PowerShell/Data/Abbr/misc.csv

1	Abbr,Description
2	0D,obvious deed
3	1AM,Air Mechanic 1st Class
4	1D,One-Dimensional
5	2AM,Air Mechanic 2nd Class
6	2D, Two-dimensional
7	2G, Second-generation mobile (cellular, wireless) telephone system
8	2LA,Two Letter Acronym
9	2Lt,2nd Lieutenant
10	3AM,Air Mechanic 3rd Class
11	3D, Three-Dimensional
12	3G, Third-generation mobile telephone system
13	3i, Investors In Industry (venture capitalists)
14	3M, Minnesota Mining and Manufacturing Company
15	4D, Four-Dimensional (usually three spatial plus one temporal dimension, sometimes four spatial ones)
16	4G, Fourth-generation mobile telephone system
17	4GL, Fourth-generation programming language
18	4WD, Four-wheel drive
19	5D,Five-Dimensional
20	6D,Six-Dimensional
21	7D,Seven-Dimensional
22	8D,Eight-Dimensional
23	9D,Nine-Dimensional
24	\a, Atto-
25	A, Ampere
26	A1C,Airman First Class
27	A4,many, including a European standard office paper size; see entry
28	A10, Atlantic 10 Conference
29	aa, Afar language (ISO 639-1 code)
30	aA, Attoampere
31	AA- achieved availability,Alcoholics Anonymous, Armed Forces Americas (postal symbol),Aruba (FIPS 10-4 territory code), assembly area,Automobile Association,avenue of approach
32	AAAI, Association for the Advancement of Artificial Intelligence, formerly American Association for Artificial Intelligence
33	AAAS, American Association for the Advancement of Science
34	AAAV, Advanced Amphibious Assault Vehicle
35	AAC- American Athletic Conference,Army Air Corps (British Army)
36	AAD- analogue-analogue-digital (CD quality),Australian Antarctic Division
37	AADD,Adult attention deficit disorder
38	AADT, annual average daily traffic
39	AADAC, Alberta Alcohol and Drug Abuse Commission
40	AADC- area air defense commander, amino acid decarboxylase, aromatic L-amino acid decarboxylase, Australian Antarctic Data Centre
41	AAFC- U.S. Army Air Corps Ferrying Command (1941-1942),All-America Football Conference (1946-1949)
42	AAFES, Army and Air Force Exchange Service
43	AAI, applied artificial intelligence
44	AAIS, advanced airborne interceptor simulator
45	AAM, air-to-air missile
46	AAMOF, as a matter of fact
47	AAN, American Academy of Nursing
48	AANEAS, Anglo-Australian Near-Earth Asteroid Survey
49	AAODL, Atmospheric Aerosols and Optics Data Library
50	AAP- advanced acquisition plan,Allied administrative publication,American Academy of Pediatrics
51	AAPC, Accounting and Auditing Policy Committee
52	aar, Afar language (ISO 639-2 code)
53	AAR- after-action review,Association of American Railroads
54	AARP,(i/s) American Association of Retired Persons (now officially known only by the initials)
55	AASPEM, advanced air-to-air system performance evaluation model
56	AAT, Australian Antarctic Territory
57	AAV, Amphibious Assault Vehicle
58	AAWC, anti-air warfare commander
59	ab, Abkhaz language (ISO 639-1 code)
60	AB- Able Seaman (both the rank and the occupation), Alberta (postal symbol)
61	ABA- Adriatic Basketball Association,American Bar Association,American Basketball Association,American Beverage Association,American Bicycle Association,American Birding Association,Australian Broadcasting Authority
62	ABB, ASEA Brown Boveri (Swiss-Swedish multinational company)
63	ABBA, Agnetha, Benny, Björn, Anni-Frid (Swedish pop group)
64	ABC- abstinence, be faithful, condoms,Active Body Control,airway, breathing, circulation (see CPR),Alcoholic Beverage Commission,alien big cat,always be careful,American Bird Conservancy,American-born Chinese,American Broadcasting Company,anti-lock brake controller,Associated British Corporation,Atanasoff-Berry Computer,Atlantic Baptist College,atomic, biological, chemical (see NBC),Australian Broadcasting Corporation
65	ABCA- American, British and Canadian Armies (originally),Army Bureau of Current Affairs
66	ABCS, (U.S.) Army Battle Command System
67	ABET, Accreditation Board for Engineering and Technology
68	ABFIST, Advanced Bradley Full Crew Interactive Skills Trainer
69	ABGI, Addington-Barker Group International
70	ABIN, Agência Brasileira de Inteligência (Brazilian Intelligence Agency)
71	abk, Abkhaz language (ISO 639-2 code)
72	ABL, American Basketball League
73	ABLE, AirBorne Law Enforcement (police air support unit)
74	ABM, anti-ballistic missile,Asynchronous Balanced Mode,automated banking machine
75	ABMC, American Battle Monuments Commission
76	ABN, Australian Business Number (a number issued by the Australian government as registration of a business and used for taxation purposes)
77	ABPI, Association of the British Pharmaceutical Industry
78	ABRSM, Associated Board of the Royal Schools of Music
79	ABS- acrylonitrile butadiene styrene,anti-lock braking system
80	ABSTRIPS, abstraction-based STRIPS
81	ABV, Alcohol by volume
82	ABW, Aruba (ISO 3166 trigram)
83	aC, Attocoulomb
84	Ac, Actinium
85	AC1,Aircraftman 1st Class
86	AC2,Aircraftman 2nd Class
87	ACARS, Aircraft Communications Addressing and Reporting System
88	ACAS- Aboriginal Children's Advancement Society,Advisory, Conciliation and Arbitration Service
89	ACC- U.S. Air Combat Command,Air Component Commander,Alpine Club of Canada,Altocumulus castellanus,Area Control Center,Atlantic Coast Conference,Automatic climate control
90	ACCA- The Association of Chartered Certified Accountants,Automatic Cloud Cover Assessment
91	ACCAC, Awdurdod Cymwysterau, Cwricwlwm ac Asesu Cymru (Qualifications, Curriculum and Assessment Authority for Wales)
92	ACCD,American Coalition of Citizens with Disabilities
93	ACCS, Air Communications and Control Squadron
94	ACDA, Arms Control & Disarmament Agency
95	ACDC- Alternating Current Direct Current,the name of an Australian rock music band,a term for a bisexual person,A/Cdre,Air Commodore
96	ACDT- Apple Certified Desktop Technician, Australian Central Daylight Time
97	ACE- Air Combat Emulator (computer game),Allied Command Europe,Armored Combat Earthmover,Automatic Computing Engine
98	ACF- Administration for Children and Families,American Car and Foundry,American Culinary Federation
99	ACHT, Average Call Hold Time
100	ACID, Atomicity, Consistency, Isolation, and Durability (in databases)
101	ACINT, Acoustic Intelligence
102	ACK, Acknowledge (telecommunications; cf. NAK)
103	ACL- Access Control List,Anterior cruciate ligament; the initialism can also refer to an injury to this ligament.,Atlantic Coast Line Railroad
104	ACLJ, American Center for Law and Justice
105	ACLOS, Automatic CLOS (missile control system)
106	ACLS, American Council of Learned Societies
107	ACLU- American Civil Liberties Union,American Communist Lawyers Union (pejorative slang for the above)
108	ACM,many, including Association for Computing Machinery; see entry
109	ACMC, (U.S.) Assistant Commandant of the Marine Corps
110	ACN- Airborne Communications Node,Australian Company Number (number issued by the Australian government as registration of a limited liability company)
111	ACNA, Anglican Church in North America
112	ACO, Airspace Control Order
113	ACOBA, Advisory Committee on Business Appointments
114	ACOG, American College of Obstetricians and Gynecologists
115	ACOM, (U.S.) Atlantic Command
116	ACORN, Association of Community Organizations for Reform Now
117	ACP- African, Caribbean and Pacific Group of States,Air Control Point
118	ACR, Advanced Concepts and Requirements
119	ACRI, African Crisis Initiative
120	ACRT, Advanced Concepts Research Tool simulator
121	ACS- Affiliated Computer Services (NYSE ACS),Alaska Communications Service,American Cancer Society,American Chemical Society,Association of Caribbean States,Australian Computer Society
122	ACSC, Army Command and Staff College (various nations)
123	ACST, Australian Central Standard Time
124	ACST, American Cooperative School of Tunis
125	ACT- Adaptive Control of Thought (cognitive model),American College Test (ing Program),Australian Capital Territory (also postal symbol),ACT UP, AIDS Coalition to Unleash Power
126	ACTD, Advanced Concept Technology Demonstration
127	ACTF- (U.S.) Army Constructive Training Federation,Australian Children's Television Foundation,ACT-R, ACT-Rational (cognitive model),ACT-R/PM, ACT-R/Perceptual-Motor (cognitive model)
128	ACTU, Australian Council of Trade Unions
129	ACU, American Conservative Union
130	ACUF- BGN Advisory Committee on Undersea Features, American Conservative Union Foundation
131	ACV, Armoured Combat Vehicle
132	ADA, Air Defence Artillery,American Dental Association,Assistant District Attorney,Americans with Disabilities Act (see also the similar but non-acronymic Ada programming language)
133	ADAGE, Air Defense Air to Ground Engagement (simulation)
134	ADAP, AIDS Drug Assistance Program
135	ADAS,(a/i) Asiago-DLR Asteroid Survey
136	ADAT, Alesis Digital Audio Tape (recording format)
137	ADatP, Automated Data Processing
138	ADATS, Agricultural Development and Training Society,Air Defence Anti-Tank System,Australian Defence Air Traffic System
139	ADB, Asian Development Bank
140	ADC, Aide De Camp,U.S. Air Defense Command (1946-1992),Apple Display Connector,Program Against Digital Counterfeiting of Currency
141	ADCTS, Advanced Distributed Combat Training System
142	ADD, Analog Digital Digital (CD quality),Attention-Deficit Disorder,Administration on Developmental Disabilities
143	ADDIE, Analyze Design Develop Implement and Evaluate
144	ADDNS, Advanced Deployable Day/Night Simulation
145	ADF, Australian Defence Force,African Development Foundation
146	ADGB,Air Defence of Great Britain
147	ADHD, Attention-Deficit Hyperactivity Disorder
148	ADHS, Attention-Deficit Hyperactivity Syndrome
149	ADI, Acceptable/Allowable Daily Intake
150	ADIZ,(a/i) Air Defence Identification Zone
151	ADL, Anti-Defamation League
152	ADM, Administrative,,Admiral, and the U.S. Public Health Service Commissioned Corps,Archer Daniels Midland,Assistant Deputy Minister
153	ADOA,(a/i) Air Defence Operations Area
154	ADP, Adenosine DiPhosphate,Army Doctrine Publication (UK, Canada, Australia),Automatic/Automated Data Processing
155	ADRG, Arc-second Raster Chart (ARC) Digitized Raster Graphics
156	ADS,(a/i) Active Denial System,Astrophysics Data System,Attention Deficit Syndrome
157	ADSR, Attack, Decay, Sustain, Release (sound envelope specification)
158	ADT, Atlantic Daylight Time (UTC−3 hours)
159	ADTB, Army Doctrine and Training Bulletin
160	ADW, Air Defence Warning
161	ae, Avestan language (ISO 639-1 code)
162	AE- Armed Forces Africa/Canada/Europe/Middle East (postal symbol),United Arab Emirates (ISO 3166 digram; FIPS 10-4 country code), Artix Entertainment,American Eagle,A&E,(a/i) Arts & Entertainment Network, the original name for the U.S. TV channel now known as A&E Network
163	AED, United Arab Emirates dirham (ISO 4217 currency code)
164	AEDT, Australian Eastern Daylight Time
165	AEF, American Expeditionary Force
166	AEGIS, Airborne Early warning Ground environment Interface Segment (fake etymology)
167	AESR, Aeronautical Equipment Service Record
168	AEST, Australian Eastern Standard Time
169	aet, After extra time (Football)
170	AEW, Airborne Early Warning,Airborne Electronic Warfare
171	af, Afrikaans language (ISO 639-1 code)
172	aF, Attofarad
173	AF- Afghanistan (FIPS 10-4 country code; ISO 3166 digram), Air Force,As f*ck
174	AFAIC, As Far As I'm Concerned
175	AFAICT, As Far As I Can Tell
176	AFAIK, As Far As I Know
177	AFAIR, As Far As I Remember/Recall
178	AFATDS, Advanced Field Artillery Tactical Data System
179	AFC- American Football Conference,Asian Football Confederation
180	AFCEA, Armed Forces Communications and Electronics Association
181	AFDB, African Development Bank
182	AFES, Automatic Fire Extinguishing System
183	AFG, Afghanistan (ISO 3166 trigram)
184	AFIS- Automated Fingerprint Identification System,American Forces Information Service
185	AFIST, Abrams Full Crew Interactive Skills Trainer
186	AFJ, April Fool's Joke
187	AFK, Away From Keyboard (Internet chat abbreviation)
188	AFL- American Federation of Labor,American Football League — either the 1960s league that merged into the National Football League, or one of several other leagues of American football,Arena Football League,Australian Football League,AFL-CIO, American Federation of Labor,Congress of Industrial Organizations
189	AFLAC, American Family Life Assurance Company of Columbus
190	AFM, Army Field Manual (UK; the U.S. more frequently uses just FM),Atomic Force Microscope,Aviation Fleet Maintenance
191	AFN, Afghani (ISO 4217 currency code)
192	AFO, Association of Field Ornithologists
193	AFOSR, U.S. Air Force Office of Scientific Research
194	AFQT, Armed Forces Qualification Test
195	afr, Afrikaans language (ISO 639-2 code)
196	AFRC, Air Force Reserve Command
197	AFRL, Air Force Research Laboratory
198	AFROTC, Air Force Reserve Officer Training Corps
199	AFRRI,(i, U.S.) Armed Forces Radiobiology Research Institute
200	AFRTS, Armed Forces Radio and Television Service
201	AFS- Active Front Steering,Air Facility Sub-System,Amniotic Fluid-derived Stem cell,AFS&A or AFSA, U.S. Air Force Studies and Analysis
202	AFSC- U.S. Air Force Staff College (obsolete; replaced with JFSC),U.S. Air Force Systems Command
203	AFSCN, U.S. Air Force Satellite Control Network
204	AFSPC, Air Force Space Command
205	AFT,American Farmland Trust
206	AFV, armoured fighting vehicle
207	AFWA- Air Force Weather Agency,Association of Fish and Wildlife Agencies,AG[edit]
208	ag, Attogram
209	Ag, Silver (Latin argentum)
210	AGARD, Advisory Group for Aerospace Research and Development
211	AGARDograph, Advanced Guidance for Alliance Research and Development publication
212	AGASA, Akeno Giant Air Shower Array (cosmic ray detector)
213	AGB, Internal Nintendo initialism (Advanced Game Boy) for Game Boy Advance
214	AGC- Apollo Guidance Computer,Automatic Gain Control
215	AGC, Adjutant General's Corps (British Army)
216	AGDC, Australian Game Developers' Conference
217	AGI, Auxiliary Group Intelligence
218	AGL, Above Ground Level
219	AGM, Annual General Meeting
220	AGN, Active Galactic Nucleus
221	AGO, Angola (ISO 3166 trigram)
222	AGP, Accelerated Graphics Port
223	AGRICOLA, Agriculture Online Access
224	AGS, Alaska Ground Station (LandSat)
225	AGTS, Advanced Gunnery Training System
226	AGU, American Geophysical Union
227	AGW, Autonomous Guided Weapon
228	aH, Attohenry
229	Ah, Ampere-hour
230	AH, Attack Helicopter
231	AHA, American Heart Association
232	AHCPR, Agency for Health Care Policy and Research (obsolete; replaced with AHRQ)
233	AHEC, Australian Health Ethics Committee
234	AHPCRC, Army High Performance Computing Research Center
235	AHQ,Air Headquarters
236	AHRQ, Agency for Healthcare Research and Quality
237	AHS, American Housing Survey
238	AI- Air Interdiction,Amnesty International,Artificial Insemination,Artificial Intelligence, Anguilla (ISO 3166 digram)
239	AIA- Aerospace Industries Association,American Institute of Architects, Anguilla (ISO 3166 trigram)
240	AIAA, American Institute of Aeronautics and Astronautics
241	AIC- African Independent Church,Animal Identification Coordinator
242	AICD, Australian Institute of Company Directors
243	AICMFP, And I Claim My Five Pounds
244	AID, U.S. Agency for International Development
245	AIDS, Acquired Immune Deficiency Syndrome
246	AIM,many, including AOL Instant Messenger, Australian Institute of Management; see entry
247	AIMP, Aurora Incremental Modernization Project
248	AIPAC, American Israel Public Affairs Committee
249	AIR, Aircraft Inventory Record
250	AIRFA, American Indian Religious Freedom Act
251	AIRS,(a/i) Aerometric Information Retrieval System (obsolete; replaced with AFS)
252	AIS- Australian Institute of Sport,Automatic Identification System
253	AISB, (British Society for the Study of) Artificial Intelligence and the Simulation of Behaviour
254	aJ, Attojoule
255	AJ, Azerbaijan (FIPS 10-4 country code)
256	Ajax, Asynchronous JavaScript And XML
257	AJD, Astronomical Julian day
258	AJP, Allied Joint Publication
259	AJPW, All Japan Pro Wrestling
260	ak, Akan languages (ISO 639-1 code)
261	aK, Attokelvin
262	AK, Alaska (postal symbol)
263	aka, Akan languages (ISO 639-2 code)
264	AKA, Above knee amputation (orthopaedic usage)
265	AKDT, Alaska Standard Daylight Saving Time (UTC−8 hours)
266	AKST, Alaska Standard Time (UTC−9 hours)
267	aL, Attolitre
268	Al, Aluminium
269	ALA, Åland Islands (ISO 3166 trigram)
270	ALAP, As Long/Late As Possible
271	ALARM, Air-Launched Anti-Radar Missile
272	ALB, Albania (ISO 3166 trigram)
273	ALD, Accounting Line Designator (nuclear weapon targeting)
274	ALERT, Advanced Linked Extended Reconnaissance and Targeting,Attack and Launch Early Reporting to Theatre
275	ALF- Africa Leadership Forum,Alien Life Form (cf. ALF (TV series)),Animal Liberation Front
276	ALG, Algeria (IOC and FIFA trigram, but not ISO 3166)
277	ALGOL, ALGOrithmic Language
278	ALL, Albanian lek (ISO 4217 currency code)
279	ALOA, Associated Locksmiths of America, Inc.
280	ALOC- Air Lines Of Communication, Average Length of Calls
281	ALPA, Air Line Pilots Association
282	ALS, Amyotrophic Lateral Sclerosis,Automatic Landing System
283	ALSHS, Abraham Low Self-Help Systems
284	ALSP, Aggregate Level Simulation Protocol
285	ALTE, Association of Language Testers in Europe
286	ALTACS, Automated decision Logic Tactical Air Combat Simulation
287	am- Amharic language (ISO 639-1 code),Attometre
288	Am, Americium
289	AM-many, including Amplitude Modulation and Ante Meridiem; see entry, Armenia (FIPS 10-4 country code; ISO 3166 digram)
290	AM1,Airman 1st class
291	AMA- American Medical Association,Australian Medical Association
292	AMAPS, Aircraft, Missile, Avionics Performance Simulation
293	AMC- Adaptive modulation and coding (digital communications),U.S. Air Mobility Command,American Motors Corporation,American Movie Classics (TV network; now known simply by the initials),U.S. Army Materiel Command
294	AMCB, U.S. Army/Marine Corps Board
295	AMD- Advanced Micro Devices,Age-related Macular Degeneration, Armenian dram (ISO 4217 currency code)
296	AMF, Afghan Military Force
297	AMFR- Age-specific Marital Fertility Rate,Amplitude Modulation Following Response
298	AMFRS- Advanced Multi-Function Radio Frequency System,Automatic Multisensor Feature-based Recognition System
299	amh, Amharic language (ISO 639-2 code)
300	AML, Acute Myeloid Leukaemia
301	AMLCD, Active Matrix Liquid Crystal Display
302	AMLO- Andrés Manuel López Obrador (Mexican politician),Anti-Money Laundering Office (Thailand government agency)
303	AMO, Atlantic Multidecadal Oscillation
304	AMOLED, Active-matrix organic light-emitting diode
305	AMOS- Advanced MOrtar System,Air Force Maui Optical and Supercomputing observatory
306	AMP- Adenosine MonoPhosphate,Automated Mission Planner
307	AMRAAM, Advanced Medium-Range Air-to-Air Missile
308	AMRDEC, U.S. Aviation & Missile Research, Development, & Engineering Center
309	AMS- Agriculture Marketing Service,American Mathematical Society
310	AMSAA,(i/a) U.S. Army Materiel Systems Analysis Activity
311	AMSO,(i/a) U.S. Army Model and Simulation Office
312	AMSU,Advanced Microwave Sounding Unit
313	AMTE, UK Admiralty Marine Technology Establishment (1977-1984)
314	an, Aragonese language (ISO 639-1 code)
315	aN, Attonewton
316	AN- Andorra (FIPS 10-4 country code),Netherlands Antilles (ISO 3166 digram)
317	ANA- Administration for Native Americans,Afghan National Army,All Nippon Airways,Anti-Nuclear Anti-body, Australian National Airways,Australian Natives' Association
318	ANC, African National Congress
319	AND, Andorra (ISO 3166 trigram)
320	ANFO, Ammonium nitrate/fuel oil (explosive)
321	ANG- Air National Guard, Angola (IOC and FIFA trigram, but not ISO 3166), Netherlands Antillian guilder (ISO 4217 currency code)
322	ANGLiCo, Air/Naval Gunfire Liaison Company
323	ANL, Argonne National Laboratory
324	ANM, Acoustic Noise Monitor
325	ANOVA, ANalysis Of VAriance
326	ANS, Applied and Natural Sciences
327	ANSI, American National Standards Institute
328	ANTM, America's Next Top Model
329	ANT- Netherlands Antilles (ISO 3166 trigram),Antigua and Barbuda (IOC trigram, but not ISO 3166 or FIFA)
330	ANTY,Acronyms, No Thank You
331	ANWR, Arctic National Wildlife Refuge /ˈænwɑr/
332	ANZ, Australia and New Zealand Banking Group
333	ANZAC, Australian and New Zealand Army Corps
334	AO, Angola (FIPS 10-4 country code; ISO 3166 digram), Approach Officer (submarine),Area of Operations
335	AOA, Air Officer in charge of Administration,Argonne National Laboratory, Angolan kwanza (ISO 4217 currency code), Award Of Arms (heraldry)
336	AOC, Air Operations Centre,Air Officer Commanding
337	AOD, Adrenalin O.D. (punk rock band)
338	AOI, Angle Of Incidence Arab Organization for Industrialization
339	AOL, America OnLine
340	AOR, Area of Responsibility
341	AOSTH, Adventures of Sonic the Hedgehog
342	AOTS, Attack of the Show!
343	AOU, American Ornithologists' Union
344	AP- Advanced Placement,Air Publication, Andhra Pradesh (Indian state code), Armed Forces Pacific (postal symbol), Associated Press,Auto Pilot
345	APA -
346	APB, All Points Bulletin (police jargon)
347	APC- Armoured Personnel Carrier,Armour Piercing Capped (ammunition)
348	APEC, Asia Pacific Economic Cooperation
349	APCNR, Armour-Piercing, Composite Non-Rigid (ammunition)
350	APCR, Armour-Piercing, Composite Rigid (ammunition)
351	APDS, Armour-Piercing, Discarding-Sabot (ammunition)
352	APEDS, AMSAA Performance Estimates Data System
353	APEX, Applied Physics Express
354	APFSDS, Armour-Piercing, Fin-Stabilised, Discarding Sabot (ammunition)
355	APHA, American Public Health Association
356	APHE, Armour-Piercing, High Explosive (ammunition)
357	APHIS, Animal and Plant Health Inspection Service
358	API, Application Programming Interface
359	APL- A Programming Language,Acute Promyeloid Leukaemia,Anti-Personnel Landmine,Applied Physics Laboratory (Johns Hopkins University)
360	APM, Advanced Power Management
361	APOD, Aerial Port (Airport) Of Debarkation
362	APOE, Aerial Port (Airport) Of Embarkation
363	APOLLO, Apache Point Observatory Lunar Laser-ranging Operation
364	APP, Allied Procedural Publication
365	APR, Annual Percentage Rate
366	APS- Advanced Photo System (cf. APS-C, an image sensor format based on the size of the original APS film frame),American Physical Society,Antiphospholipid Antibody Syndrome,AQ[edit]
367	AQ- AdventureQuest, American Samoa (FIPS 10-4 territory code),Antarctica (ISO 3166 digram), Automatic qualifier, a term used by U.S. sports media from 1998 to 2013 to refer to the six conferences whose champions automatically entered the now-defunct Bowl Championship Series of college football
368	AQIM, Al-Qaeda in the Islamic Maghreb
369	ar, Arabic language (ISO 639-1 code)
370	Ar, Argon
371	AR, Argentina (FIPS 10-4 country code; ISO 3166 digram),Arkansas (postal symbol),Armour, Arunachal Pradesh (Indian state code)
372	ara, Arabic language (ISO 639-2 code)
373	ARAG, Advanced Research and Assessment Group
374	ARB, Administrative Review Board
375	ARBA,(a/i) Army Review Boards Agency
376	ARC, Arc-second Raster Chart,Appalachian Regional Commission
377	ARCA, Automobile Racing Club of America
378	ARCENT, United States Army Central Command
379	ARDA, Advanced Research and Development Activity (became DTO 2006)
380	ARE, UK Admiralty Research Establishment (-1991), United Arab Emirates (ISO 3166 trigram)
381	ARF, ASEAN Regional Forum
382	arg, Aragonese language (ISO 639-2 code)
383	ARG, Argentina (ISO 3166 trigram)
384	ARH, Armed Reconnaissance Helicopter
385	ARI, Acute Respiratory Infection,U.S. Army Research Institute for the Behavioral and Social Sciences
386	ARL, UK Admiralty Research Laboratory (1921-1977),U.S. Army Research Laboratory,UIUC Aviation Research Laboratory
387	ARM, Anti-Radiation Missile,Adjustable-rate mortgage, Armenia (ISO 3166 trigram)
388	ARNet, Acquisition Reform Network
389	ARP, Address Resolution Protocol,Applied Research Programme
390	ARPA, Advanced Research Projects Agency
391	ARRC, ACE Rapid Reaction Corps
392	ARRF, Allied Rapid Reaction Force
393	ARRL, American Radio Relay League
394	ARS, Agricultural Research Service, Argentine peso (ISO 4217 currency code)
395	ARSC, Arctic Region Supercomputing Center
396	ARSPACE, U.S. Army Space Command
397	ART, Adaptive Resonance Theory,Anti-Retroviral Therapy
398	ARTCC, Air Route Traffic Control Center
399	as, Adult swim, Assamese language (ISO 639-1 code),Attosecond
400	aS, Attosiemens
401	As, Arsenic
402	AS, American Samoa (postal symbol; ISO 3166 digram),Australia (FIPS 10-4 country code),Assam / Asom (Indian state code)
403	AS, ActionScript
404	ASA, AcetylSalicylic Acid,American Standards Association,Army Security Agency,Atlantic Southeast Airlines
405	ASAP, As Soon As Possible
406	ASARS, Advanced Synthetic Aperture Radar System,Airborne Search and Rescue System
407	ASB, Associated Student Body,Alternative Service Book (Church of England)
408	ASBO, Anti-Social Behaviour Order
409	ASCAP, American Society of Composers, Authors, and Publishers
410	ASCC, Army Service Component Commander,Automatic Sequence Controlled Calculator,Air Standardization Coordinating Committee
411	ASCIET, All Services Combat Identification Evaluation Team
412	ASCII, American Standard Code for Information Interchange
413	ASD, (U.S.) Assistant Secretary of Defense,autism spectrum disorder
414	ASDIC, Allied Submarine Detection Investigation Committee (Sonar)
415	ASEAN, Association of Southeast Asian Nations
416	ASFAR, Americans for a Society Free of Age Restrictions
417	ASG, Area Support Group
418	ASIC, Australian Securities and Investments Commission, Aviation Security Identification Card
419	ASIO, Australian Security Intelligence Organisation, Audio stream input output
420	ASIP, Advanced System Improvement Program,Army Stationing and Installation Plan,Application-specific instruction-set processor
421	asm, Assamese language (ISO 639-2 code)
422	ASM, Air-to-Surface Missile, American Samoa (ISO 3166 trigram), American Society for Metals, American Society for Microbiology
423	ASMB, American Society for Matrix Biology,Adult Swim Message Board
424	ASME, American Society of Mechanical Engineers,American Society of Magazine ors
425	ASN, Associate of Science in Nursing
426	ASOC,(a/i) Air Sovereignty Operations Centre,Air Support Operations Centre,Airport Security and Operations Centre,Antarctic and Southern Ocean Coalition,Atlanta Symphony Orchestra Chorus,Australian Standard Offence Classification
427	ASP, Active Server Pages,American Society of Primatologists,Ammunition Supply Point,Application Service Provider (cf internet service provider),Astronomical Society of the Pacific,Association of Surfing Professionals
428	ASPI, Australian Strategic Policy Institute
429	ASR, Alkali-silica reaction,Anti Slip Regulation
430	ASRAAM, Advanced Short-Range Air-to-Air Missile
431	ASSC, Association for the Scientific Study of Consciousness
432	AST, Atlantic Standard Time (UTC−4 hours)
433	ASTIA, Armed Services Technical Information Agency
434	ASTM, American Society for Testing and Materials
435	ASTREA, Aerial Support To Regional Enforcement Agencies (sheriff's air support unit)
436	ASUW, AntiSUrface Warfare
437	ASVAB,Armed Services Vocational Aptitude Battery(taken by juniors in high school in the USA)
438	ASW, AntiSubmarine Warfare
439	ASWORG, (U.S.) AntiSubmarine Warfare Operations Research Group
440	ASX, Advanced Stream Redirector,Australian Securities Exchange
441	aT, Attotesla
442	At, Astatine
443	AT, Anti-Tank, Ashmore and Cartier Islands (FIPS 10-4 territory code),Austria (ISO 3166 digram), Advanced Technology (IBM Personal Computer/AT)
444	ATA, Advanced Technology Attachment (IBM Personal Computer),Afghan Transitional Authority,Allen Telescope Array, Antarctica (ISO 3166 trigram)
445	ATAC, Air Transportable Acoustic Communications
446	ATACMS, Army TACtical Missile System
447	ATAPI, Advanced Technology Attachment Packet Interface
448	ATAS, Air-To-Air Stinger (missile)
449	ATAT, Aiken Tactical Airsoft Team / Star Wars vehicle
450	ATB, Active Time Battle, British Antarctic Territory (ISO 3166 trigram; merged with AQ in 1979)
451	ATC, Air Traffic Control,Air Training Corps,U.S. Air Transport Command (1942-1948)- Athletic Trainer, Certified (www.nata.org)
452	ATCCIS, Army Tactical Command and Control Information System
453	ATESS, Aerospace and Telecommunications Engineering Support Squadron
454	ATG, Antigua and Barbuda (ISO 3166 and FIFA trigram)
455	ATGM, Anti-Tank Guided Missile
456	ATGW, Anti-Tank Guided Weapon
457	ATI, Allied Telesyn International, Inc., Array Technologies Incorporated. (ATI Technologies)
458	Atisbo,a Local Government Area in Nigeria named for constituent communities (Ago-Are, Tede, Irawo, Sabe, Baasi, Ofiki and Owo)
459	ATK, Attack
460	ATL, Atlanta, Georgia, the largest city and capital of Georgia
461	ATLAS, All-Terrain Lifter Army System, Assessment Tool for LAnd Systems
462	ATM, Automated Teller Machine,Asynchronous Transfer Mode,At The Moment
463	ATN, Dronning Maud Land (ISO 3166 trigram; merged with AQ in 1983)
464	ATO, Air Tasking Order,Australian Taxation Office
465	ATP, Adenosine TriPhosphate,Allied Tactical Publication,Ammunition Transfer Point
466	ATSD, (U.S.) Assistant Secretary of Defense
467	ATSDR, Agency for Toxic Substances and Disease Registry
468	ATV, All-Terrain Vehicle
469	ATWA, Air, Trees, Water, Animals
470	Au, Gold (Latin Aurum)
471	AU, African Union (was OAU before 2000),American University, Astronomical Unit,Australia (ISO 3166 digram),Austria (FIPS 10-4 country code)
472	AUD, Australian dollar (ISO 4217 currency code)
473	AUS, Australia (ISO 3166 trigram)
474	AUSCANNZUKUS, Australia, Canada, New Zealand, United Kingdom, United States (security designation)
475	Auslan, Australian Sign Language
476	AUT, Austria (ISO 3166 trigram)
477	AUTL, Army Universal Task List
478	av, Avar language (ISO 639-1 code)
479	aV, Attovolt
480	Av, Aperture value (photographic mode)
481	AV- Anguilla (FIPS 10-4 territory code), Audio-Visual, Aviation
482	ava, Avar language (ISO 639-2 code)
483	AVA, American Viticultural Area
484	AVB, Audio Video Bridging
485	AVDLR, Aviation Depot Level Repair
486	ave, Avestan language (ISO 639-2 code)
487	AVGP, Armoured Vehicle, General Purpose
488	AVI, Audio Video Interleave
489	AVIM, Aviation Intermediate Maintenance
490	AVLB, Armoured Vehicle Launched Body
491	AVM- Air Vice-Marshal, Arteriovenous malformation
492	AVO, Apprehended Violence Order
493	AVP, Arubaanse Volkspartij
494	AVP, Association of Volleyball Professionals
495	AVRE, Armoured Vehicle Royal Engineers
496	AVTB- Armoured Vehicle Test Bed, Aviation Test Bed
497	AVUM, Aviation Unit Maintenance
498	AVVO, Acute Vaginal Venereal Outbreak
499	aW, Attowatt
500	AW, Aruba (ISO 3166 digram)
501	AWA, American Wrestling Association
502	AWACS, Airborne Warning And Control System
503	AWC, Air Warfare Centre
504	AWD,many, including All Wheel Drive; see entry
505	AWE,(i/a) Advanced Warfighting Experiment
506	AWG, Aruban guilder (ISO 4217 currency code)
507	AWOL, Absent Without Official Leave / Absent WithOut Leave (military jargon)
508	AWP, Awaiting Parts (SM&R code)
509	AWSIM, Air Warfare SIMulation
510	AWST, Australian Western Standard Time
511	AWW, Above Water Warfare
512	AX, Åland Islands (ISO 3166 digram)
513	AXP, Ambulance eXchange Point
514	ay, Aymara language (ISO 639-1 code)
515	AY, Antarctica (FIPS 10-4 territory code)
516	AYBABTU, All Your Base Are Belong To Us
517	aym, Aymara language (ISO 639-2 code)
518	AYU, As Yet Unknown
519	az, Azerbaijani language (ISO 639-1 code)
520	AZ- Arizona (postal symbol),Azerbaijan (ISO 3166 digram), Alkmaar Zaanstreek (Dutch football club)
521	aze, Azerbaijani language (ISO 639-2 code)
522	AZE, Azerbaijan (ISO 3166 trigram)
523	AZN, Azerbaijani manat (ISO 4217 currency code)
524	AZUR, Actions en zone urbaine (French, Urban Operations)
525	BAR- Barbados (IOC trigram, but not FIFA or ISO 3166), British American Racing,Browning Automatic Rifle,Buy-American Restrictions,BARD - Binational Agricultural Research and Development fund (between the US and Israel),BARDA - Biomedical Advanced Research and Development Agency,BART - Bay Area Rapid Transit,BAS - Battalion Aid Station,BASE - Building, Antenna, Span, Earth (parachute from),BASF - Badische Anilin und Soda Fabrik (Baden Aniline and Soda Factory, a German chemicals company),BASIC - Beginner's All-purpose Symbolic Instruction Code (acronym was added later, originally it was simply Basic),BAT - (a/i) Basic Aid Training,BATF - U.S. Bureau of Alcohol, Tobacco, and Firearms,BATS - Behavior Analysis Training System - Bradley Advanced Training System,BATTeRS - Bisei Asteroid Tracking Telescope for Rapid Survey,BB[edit]
526	BB- Barbados (ISO 3166 digram; FIPS 10-4 country code), Boys' Brigade (Christian youth organization),Brigitte Bardot (actress),Bumblebee
527	BBB- Better Business Bureau,Blood-brain barrier
528	BBC- Breeding Bird Census,British Broadcasting Corporation, Bumper to Back of Cab (trucking measurement)
529	BBD- Barbadian dollar (ISO 4217 currency code), Bowel Bladder Dysfunction
530	BBL- Be Back Later,Bird Banding Laboratory,British Basketball League,BBN - Bolt, Beranek and Newman,BBQ - Barbecue[1]
531	BBS- Breeding Bird Survey (North America),Brigade/Battalion Battle Simulation,Bulletin Board System,BBSRC - U.K. Biotechnology and Biological Sciences Research Council,BBVA - Banco Bilbao Vizcaya Argentaria (Spanish bank)
532	BBYO,B'nai B'rith Youth Organization
533	BC- Before Christ,Blind Copy (in emailers),Boston College, Botswana (FIPS 10-4 country code; from Bechuanaland),British Columbia (postal symbol)
534	BCA- Bachelor of Computer Application,Black Coaches & Administrators,BCC - Blind Carbon Copy
535	BCCI- Bank of Credit and Commerce International,Board of Control for Cricket in India,BCD - Binary-Coded Decimal
536	BCS- Bachelor of Computer Science,Bardeen, Cooper, and Schrieffer superconduction theory,Bowl Championship Series (US college football),BCT - Brigade Combat Team,BD[edit],BD - Bangladesh (ISO 3166 digram) - Bermuda (FIPS 10-4 territory code),BDA - British Dental Association,BDD - Body Dysmorphic Disorder - British Defence Doctrine,Bde - Brigade,BDFL - Benevolent Dictator For Life,BDI - Burundi (ISO 3166 trigram),BDNF - Brain-Derived Neurotrophic Factor,BDO - Battle Dress Overgarment,BDOS - Basic Disk Operating System; part of CP/M,BDS -  - Bachelor of Dental Surgery,BDSM - Bondage and Discipline, Domination and Submission, Sadism and Masochism,BDT - Bangladeshi taka (ISO 4217 currency code) - Bureau de développement des télécommunications (Telecommunication Development Bureau, became ITU-D),BDTA - British Dental Trade Association,BDU - Battle-Dress Uniform,BE[edit],be - Belarusian language (ISO 639-1 code),Be - Beryllium,BE - Belgium (FIPS 10-4 country code; ISO 3166 digram)
537	BEA- Banque extérieure d'Algérie,British European Airways (ancestor of British Airways),British Electricity Authority,bel - Belarusian language (ISO 639-2 code),BEL - Belgium (ISO 3166 trigram),BEM - British Empire Medal - Bug-Eyed Monster,ben - Bengali language (ISO 639-2 code),BEN - Benin (ISO 3166 trigram),BEO - Banquet Event Order,BERC - Business Environmental Resource Center,BER - Bit Error Rate
538	BH- Bahrain (ISO 3166 digram),Belize (FIPS 10-4 country code),BHD - Bahraini dinar (ISO 4217 currency code),BHR - Bahrain (ISO 3166 trigram)
539	BNF- Backus-Naur Form (computing),British National Formulary,BNICE - Biological, Nuclear, Incendiary, Chemical, and Explosive Agents
540	BNP- British National Party,Banque Nationale de Paris, a predecessor to today's BNP Paribas,BNS - Bank of Nova Scotia,BNSF - (i/s) Burlington Northern Santa Fe (also AAR reporting mark),BO[edit],bo - Tibetan language (ISO 639-1 code)
541	BO- Back Orifice, Belarus (FIPS 10-4 country code), Biarritz Olympique (French rugby union club), Bolivia (ISO 3166 digram), Body odor,BO2k - Back Orifice 2000,BOAC - British Overseas Airways Corporation (predecessor of British Airways)
542	BoAML,Bank of America Merrill Lynch
543	BOC- British Orthodontic Society,British Oxygen Company,BÖC - Blue Öyster Cult,bod - Tibetan language (ISO 639-2 code),BOD - Biochemical Oxygen Demand,BODMAS - Brackets, Orders, Division, Multiplication, Addition, Subtraction,BOFH - Bastard Operator From Hell,BOGA - Bend Over and Grab Ankles,BOGOF - Buy One, Get One Free
544	BOGs, Bunch of Guys
545	BOI- Balance Of Investment,Basis Of Issue,BOL - Bolivia (ISO 3166 trigram)
546	BOM- Base Object Model,Bill Of Materials,Block of the Month quilting term,Business opportunity meeting,BOP - Balance of Payments,BOPB - Biarritz Olympique Pays Basque (the complete name of the rugby club),BOPD - Barrel of Oil Per Day
547	BOQ- Bill Of Quotations,Bachelor Officers' Quarters,Bank Of Queensland,bos - Bosnian language (ISO 639-2 code),BOS - Battlefield Operating System
548	BOT- Balance of Trade, Botswana (IOC and FIFA trigram, but not ISO 3166), Build Operate Transfer, Bank of Thailand,BP[edit]
549	BP- Battle Position,British Petroleum (today, BP does not officially stand for anything), Solomon Islands (FIPS 10-4 country code; from British Protectorate of the Solomon Islands),Bp - Bishop,BPD - Bipolar Personality Disorder,BPM - Beats Per Minute,BPMo - Business Process Mobility
550	BPV- Battlefield Planning Visualization,Bovine papillomavirus,BQ[edit]
551	BQ- British Antarctic Territory (former ISO 3166 digram; merged with AQ in 1979),Caribbean Netherlands (current ISO 3166 digram; based on the entity's alternate name of Bonaire, Sint Eustatius and Saba),Navassa Island (FIPS 10-4 territory code),BR[edit],br - Breton language (ISO 639-1 code),Br - Bromine
552	BR- Brazil (ISO 3166 digram; FIPS 10-4 country code) - Bihar (Indian state code), British Rail,Break Ranks (marching band term),BRA - Brazil (ISO 3166 trigram),BRAG - Bicycle Ride Across Georgia,BRASS - Breathe, Relax, Aim, Sight, Squeeze (Acronym for using a rifle)
553	BRN- Bahrain (IOC trigram, but not FIFA or ISO 3166), Brunei (ISO 3166 trigram),BRSB - Battlefield Reasoning System Brianna,BRU - Brunei (IOC and FIFA trigram, but not ISO 3166),BS[edit],bs - Bosnian language (ISO 639-1 code)
554	BS- The Bahamas (ISO 3166 digram),Bassas da India (FIPS 10-4 territory code),Bachelor of Science degree,British subject
555	Bullshit-
556	BSA- Birmingham Small Arms (motorcycles company),Boy Scouts of America,Brigade Support Area
557	BSatCoP,Benjamin Sniddlegrass and the Cauldron of Penguins
558	BSD- Bahamian dollar (ISO 4217 currency code), Berkeley Software Distribution (distinct from BSoD)
559	BSE, Bovine Spongiform Encephalopathy, better known as mad cow disease
560	BSNL-Bharat Sanchar Nigam Limited, Bachelor of Science in Nursing,BSoD - Blue Screen of Death (distinct from BSD)
561	BSP- Between-Show Promotion,Binary Space Partitioning,Board Support Package,British Standard Pipe (screw thread), Business-sponsored,Bone sialoprotein
562	BST- Binary search tree,Blended Sales Tax, Bovine somatotropin, British Summer Time,BSW - British Standard Whitworth (screw thread),BSX - Bendigo Stock Exchange,BT[edit]
563	Bt- Baronet,Bacillus thuringiensis
564	c, Centi
565	C, Carbon,Coulomb,One Hundred (in Roman numerals)
566	c2c, the British rail company formerly known as LTS Rail
567	C2C, Consumer-To-Consumer electronic commerce,Cam-To-Cam internet chat
568	ca, Catalan language (ISO 639-1 code)
569	Ca, Calcium
570	CA- California (postal symbol),Canada (FIPS 10-4 country code; ISO 3166 digram),Catalonia, Civil Affairs,Close Armour,Cocaine Anonymous,Computer Associates,Counter-Air,Cricket Australia
571	CAA- Canadian Automobile Association,(NORAD) Center for Aerospace Analysis,(U.S.) Center for Army Analysis,(U.S.) Clean Air Act,(U.S. Army) Concepts Analysis Agency,Civil Aviation Authority,Colonial Athletic Association
572	CAAT- or Campaign Against Arms Trade,Center for Alternatives to Animal Testing
573	CAC- California Association of Criminalists,Chronic Asymptomatic [Disease] Carrier,CACM Central American Common Market
574	CACM, Communications of the ACM
575	CAD- Canadian dollar (ISO 4217 currency code), Computer-Aided Design,Computer-Aided Dispatch,Cpplint Anxiety Disorder, Condition suffered by software developers who worry about whether they've left any whitespace on the end of a line
576	CADCAM, Computer-Aided Design/Computer-Aided Manufacturing
577	CADPAT, CAnadian Disruptive PATtern
578	CADMID, Concept, Assessment, Demonstration, Manufacture, In service, Disposal (life cycle mnemonic)
579	CAE- Canadian Aviation Electronics (originally),Certificate in Advanced English
580	CAEn,(i/a) Close Action Engagement (constructive simulation)
581	CAF- Central African Republic (ISO 3166 trigram), Confederation of African Football (or French Confédération Africaine de Football)
582	CAFAD, Combined Arms For Air Defence
583	CAFDE- Canadian Association of Film Distributors and Exporters,Computer Aided Federation Development Environment
584	CAFE, Corporate Average Fuel Economy standard
585	CAI, Computer Assisted Instruction
586	CAIR, Council on American-Islamic Relations
587	CALABARZON, A region in the Philippines: CAvite, LAguna, BAtangas, Rizal, queZON
588	CALL, (U.S.) Center for Army Lessons Learned
589	CALM, Communications, Air-interface, Long and Medium range
590	CalPERS, California Public Employees' Retirement System
591	Caltrans, California Department of Transpotation
592	CAM- Chemical Agent Monitor,Complementary and alternative medicine,Computer-Aided Manufacturing,Crassulacean acid metabolism (type of photosynthesis)
593	CAMRA, CAMpaign for Real Ale
594	CAN, Canada (ISO 3166 trigram)
595	CANA, Convulsive Antidote, Nerve Agent
596	CANDU, CANada Deuterium Uranium (nuclear reactor design)
597	Canola, Canadian oil, low acid (referring to a specific cultivar of rapeseed bred to have a low erucic acid content)
598	CAP- Combat Air Patrol,Civil Air Patrol,Common [Operating/Operational] Air Picture,Crisis Action Procedures,Common Agricultural Policy (European Union)
599	CAPES- CAPability Evaluation System, Combined Arms Planning and Execution System
600	CARE- Citizens Association for Racial Equality (former New Zealand organisation), Community database on Accidents on the Roads in Europe, Cooperative for Aid and Relief Everywhere (originally Cooperative for American Remittances to Europe)
601	CARMONETTE, Computerized Monte Carlo Simulation
602	CARP, Computed Air Release Point
603	CART, Championship Auto Racing Teams (now defunct)
604	CAS- Chemical Abstracts Service,Chief of the Air Staff,Close Air Support
605	CASA, Civil Aviation Safety Authority
606	CASE- Cellular ammunition storage equipment,Computer-Aided Software Engineering
607	CASS, Command Activated Sonobuoy System
608	CASTFOREM, Combined Arms and Support Task FORce Evaluation Model
609	CASTOR, Canadian Automatic Small Telescopes for Orbital Research
610	cat, Catalan language (ISO 639-2 code)
611	CAT- Community Acceptance Testing,Computer-Assisted (or Axial) Tomography
612	CATK, Counterattack
613	CATS, Computer Active Technology Suspension
614	CATT,(a/i) Combined Arms Tactical Trainer
615	CAV, Cavalry
616	CAW, Canadian Auto Workers (trade union)
617	CB- Citizens' Band radio, Cambodia (FIPS 10-4 country code)
618	CBC- Canadian Broadcasting Corporation,Christmas Bird Count,Cipher-Block Chaining,Cornering Brake Control
619	CBE- Commander of the Order of the British Empire,Cab Beside Engine (see truck)
620	CBGB, Country, Blue Grass, and Blues (former New York City nightclub)
621	CBLA, Comparative bullet lead analysis
622	CBN,CardsApp Brand Number
623	CBM,many, including Canadian Baptist Ministries and Commodore Business Machines; see entry
624	CBML, Coalition Battle Management Language
625	CBOL, Consortium for the Barcode of Life
626	CBOT, Chicago Board of Trade
627	CBR, Case-Based Reasoning
628	CBRN, Chemical, Biological, Radiological, or Nuclear (weapon or event)
629	CBRNE, Chemical, Biological, Radiological, Nuclear or [high-yield] Explosive (weapon or event)
630	CBS- Columbia Broadcasting System,Corps Battle Simulation
631	CBT- Cognitive Behaviour Therapy, Combat
632	CBUS, Columbus, Ohio
633	CC,many, including carbon copy; see entry
634	CCA, Counter Command Activity
635	CCC- Canterbury Clothing Company,Civilian Conservation Corps (U.S., 1930s and 1940s),Corpus Christi College, Oxford
636	CCCP- Central Committee of the Communist Party,Cyrillic for SSSR (Soyuz Sovetskikh Sotsialisticheskikh Respublik, Russian Союз Советских Социалистических Республик, Union of Soviet Socialist Republics)
637	CCD- Charge-Coupled Device,Confraternity of Christian Doctrine (Catechism)
638	CCF, Cartoon Cartoon Fridays
639	CCG- Canadian Coast Guard,Collectible Card Game
640	CCGC- Canadian Coast Guard Cutter,Canadian Coast Guard College
641	CCGH, Canadian Coast Guard Hovercraft
642	CCGS- Canadian Coast Guard Ship,Christ Church Grammar School
643	CCH, Computer-Controlled Hostile
644	CCIF, Comité consultatif international des communications téléphoniques à grande distance (French for International Telephone Consultative Committee, merged with the CCIT in 1956 to form the CCITT)
645	CCII- Command and Control Information Infrastructure,Community Capital Investment Initiative
646	CCIR- Comité consultatif international pour la radio (French for Consultative Committee on International Radio, became the ITU Radiocommunication Sector, ITU-R, in 1992),Commander's Critical Information Requirements
647	CCIT, Comité consultatif international télégraphique (French for International Telegraph Consultative Committee, merged with the CCIF in 1956 to form the CCITT)
648	CCITT, Comité consultatif international téléphonique et télégraphique (French for International Telegraph and Telephone Consultative Committee, became the ITU Telecommunication Standardization Sector, ITU-T, in 1992)
649	CCK- Cholecystokinin, Cocos (Keeling) Islands (ISO 3166 trigram)
650	CCM- Canada Cycle & Motor Co. Ltd. (now split into two separate companies bearing the CCM name, one manufacturing bicycles and the other ice hockey equipment),Contemporary Christian music
651	CCOC- Canadian Children's Opera Chorus,Crosley Car Owners Club
652	CCOP, Coalition Common Operating/Operational Picture
653	CCP- Casualty Collection Point,Communications Checkpoint,Contingency Communications Package
654	CCPA, Consumer Credit Protection Act
655	CCR, Creedence Clearwater Revival
656	CCRAp, Canadian Conservative Reform Alliance party
657	CCRP, Command and Control Research Program
658	CCRTS, Command and Control Research and Technology Symposium
659	CCSCS, Coordinadora de Centrales Sindicales del Cono Sur
660	CCSCS, Consultative Committee for Space Data Systems
661	CCSK, Cyclic Code Shift Keying
662	CCT, Current Commitments Team
663	CCTT, Close Combat Tactical Trainer
664	cd, Candela
665	Cd, Cadmium
666	CD,many, including Compact Disc; see entry
667	CD1, Cluster of Differentiation 1 (a small gene family)
668	CDA, UK Centre for Defence Analysis
669	CDC- Centers for Disease Control and Prevention (originally (U.S.) Communicable Disease Center),Control Data Corporation,Cult of the Dead Cow
670	CDD, Capabilities Development Document
671	CDE, Chemical Defence Equipment
672	CDEC, U.S. Combat Development Experimentation Center
673	CDF- California Department of Forestry [and Fire Protection],Common Data Format, Democratic Republic of Congo franc congolais (ISO 4217 currency code)
674	CDipAF, Certified Diploma in Accounting and Finance
675	CDL, Commercial driver's license
676	CDM- Clean Development Mechanism (Kyoto protocol),Cold Dark Matter (astronomy)
677	CDMA, Code Division Multiple Access
678	CDMSII, Cryogenic Dark Matter Search II
679	Cdr, Commander
680	CDS- Chief of the Defence Staff,Credit default swap
681	Cdt, Commandant
682	CDT, Central Daylight Time (UTC−5 hours)
683	ce, Chechen language (ISO 639-1 code)
684	Ce, Cerium
685	CE,many, including Christian/Common Era (cf. AD); see entry
686	CEA, Campaign Effectiveness Analysis
687	CECOM, U.S. Army Communications and Electronics Command
688	CEI, Competitive Enterprise Institute
689	CENTCOM, United States Central Command
690	CENTO, Central Treaty Organization (Baghdad Pact)
691	CEO, Chief Executive Officer
692	CEP, Circular Error Probable
693	CERCLA, U.S. Comprehensive Environmental Response, Compensation, and Liability Act (Superfund)
694	CERDEC,U.S. Communications-Electronics Research, Development and Engineering Center
695	CERT, Computer Emergency Response Team
696	ces, Czech language (ISO 639-2 code)
697	CESS, Centre for Earth Science Studies (India)
698	CEWC,(a/i) Council for Education in World Citizenship
699	Cf, Californium
700	CF- Canadian Forces, Central African Republic (ISO 3166 digram),Republic of the Congo (FIPS 10-4 country code)
701	CFA- Cat Fanciers' Association,Chartered Financial Analyst,Colour Filtering Array,County Fire Authority,Covering Force Area
702	CFAR- Christine's,Federal Acquisition Regulation
703	CFC- ChloroFluoroCarbon,Canadian Fish Company
704	CFES, Continuous Flow Electrophoresis System
705	CFFZ, Call For Fire Zone
706	CFG- Context-free grammar,Control flow graph
707	CFHT, Canada-France-Hawaii Telescope
708	CFI, Center for Inquiry (CSICOP)
709	CFL- Canadian Football League,Co-ordinated Fire Line
710	CFLCC, Coalition Forces Land Component Command
711	CFM, Certified Facilities Manager [(IFMA)]http://www.ifma.org/
712	CFO, Chief Financial Officer
713	CFP- Call for papers,College Football Playoff,Common Fisheries Policy (EU)
714	CFRP, Carbon fibre reinforced plastic
715	CFS, Chronic Fatigue Syndrome
716	CFSP, Common Foreign and Security Policy
717	CFU, Colony Forming Unit in Microbiology
718	CFV, Cavalry Fighting Vehicle
719	CFZ, Critical Friendly Zone
720	CG, Client Group,Computer Graphics,Controls Group, Democratic Republic of the Congo (FIPS 10-4 country code),Republic of the Congo (ISO 3166 digram)
721	CGDC, Computer Game Developers Conference (became GDC in 1998)
722	CGF, Computer-Generated Forces (Simulation)
723	CGH, Comparative Genomic Hybridisation
724	CGIG, Cross-Government Implementation Group
725	CGM, Computer Graphics Metafile
726	CGO, Republic of the Congo (IOC and FIFA trigram, but not ISO 3166)
727	CGS, Chief of the General Staff
728	CGT, Capital Gains Tax
729	ch, Chamorro language (ISO 639-1 code)
730	ch,ch(L) is used to denote the Chern character of a line bundle
731	CH, Chieftain tank, China (FIPS 10-4 country code),Switzerland (ISO 3166 digram; from Latin Confoederatio Helvetica)
732	cha, Chamorro language (ISO 639-2 code)
733	CHAMPUS, (U.S.) Civilian Health and Medical Program of the Uniformed Services (now known as TRICARE)
734	CHAOS, Cambridge Heart Anti-Oxidant Study
735	CHAPS, Clearing House Automated Payment System
736	CHDK, Canon Hack Development Kit (Canon camera firmware hack)
737	che, Chechen language (ISO 639-2 code)
738	CHE, Switzerland (ISO 3166 trigram; from Latin Confoederatio Helvetica)
739	CHF, Swiss franc (ISO 4217 currency code)
740	CHI, Columbia Helicopters, Inc
741	CHI, Computer-Human Interaction
742	CHiP, California Highway Patrol
743	CHIPS, Cosmic Hot Interstellar Plasma Spectrometer
744	CHL, Chile (ISO 3166 trigram)
745	CHLA, Core Historical Literature of Agriculture
746	CHN, China (ISO 3166 trigram)
747	CHOGM, Commonwealth Heads of Government Meeting
748	CHP, California Highway Patrol,Combined Heat and Power
749	CHPSO, California Hospital Patient Safety Organization
750	CHS, Combat Health Support
751	CHT, Certified Hand Therapist
752	chu, Old Church Slavonic language (ISO 639-2 code)
753	chv, Chuvash language (ISO 639-2 code)
754	CREN, Christian Real Estate Network Real Estate Association
755	Ci, Curie
756	CI- Chile (FIPS 10-4 country code),Côte d'Ivoire (ISO 3166 digram), Counter-Intelligence,101 (in Roman numerals)
757	CIA- Cairo International Airport,Central Intelligence Agency,Culinary Institute of America
758	CIAO- Critical Infrastructure Assurance Office,Component-Integrated ACE ORB
759	CIB, Complete In Box (Internet auction/trading listings)
760	CIBC, Canadian Imperial Bank of Commerce
761	CID- Combat Identification, Criminal Investigation Division,Criminal Investigations Department
762	CID,Certified Interior Designer,A Certified Interior Designer (CID) licensed in New York (USA) plans, designs, supervises and/or consults on various aspects of interior spaces.
763	CIEF, Comité international d'enregistrement des fréquences (International Frequency Registration Board)
764	CIF, Cost, Insurance, and Freight (Paid) (shipping)
765	CIMIC, Civil-Military Co-operation
766	CINC, Commander in Chief
767	CINEOS, Campo Imperatore Near-Earth Object Survey
768	CIO- Chief information officer,Congress of Industrial Organizations
769	CIP, Combat Identification Panel
770	CIPE, (European) Centre for International Political Economy
771	CIR, (Commander's) Critical Information Requirements
772	CIR, Corotating Interaction Region
773	CIS- Canadian Interuniversity Sport,Commonwealth of Independent States,Command and Information System,Communication and Information System
774	CISA, (U.S.) C4I Integration Support Activity
775	CISB, Complete In Sealed Box (Internet auction/trading listings)
776	CISPR, Comité international spécial des perturbations radioélectriques (Special International Committee on Radio Interference)
777	CISSP, Certified Information Systems Security Professional
778	CITS, Combat Identification Training System
779	CIV, Côte d'Ivoire (ISO 3166 trigram)
780	CIVETS, Colombia, Indonesia, Vietnam, Egypt, Turkey, South Africa (economics)
781	CIVPOP, Civilian Population
782	CIWS, Close-In Weapon System
783	CHRS,Canadian Heart Rhythm Society
784	CJ, Cayman Islands (FIPS 10-4 country code), Criminal Justice
785	CJC, Canadian Jewish Congress,Cold Junction Compensation
786	CJD, Chronological Julian Day,Creutzfeldt-Jakob Disease
787	CJCS, Chairman of the Joint Chiefs of Staff
788	CJO, Chief of Joint Operations
789	CJTF, Combined Joint Task Force
790	CK, Cocos (Keeling) Islands (FIPS 10-4 country code),Cook Islands (ISO 3166 digram)
791	CKA, commonly known as, Canada Kicks Ass
792	CKND,Codename: Kids Next Door
793	Cl, Chlorine
794	CL, Chile (ISO 3166 digram), Co-ordination Line,One Hundred and Fifty (in Roman numerals)
795	CLA, Clutterers Anonymous
796	CLEC, Competitive Local Exchange Carrier
797	CLEMARS, California Law Enforcement Mutual Aid Radio System
798	CLI, Command Line Interface/Interpreter
799	CLIC, Compact LInear Collider
800	CLO, Cornell Lab of Ornithology
801	CLOB, Character Large OBject
802	CLOS, Command to Line-Of-Sight (missile control system)
803	CLOS, Common Lisp Object System
804	CLP, Chilean peso (ISO 4217 currency code), Common [Operating/Operational] Land Picture
805	CLPFC, CentroLateral PreFrontal Cortex
806	CLRP, College Loan Repayment Program
807	Cm, Curium
808	CM- Cameroon (FIPS 10-4 country code; ISO 3166 digram), Cruise Missile, Nine Hundred (in Roman numerals)
809	CMA- U.S. Chemical Materials Agency,Country Music Association (also used to refer to the organization's annual awards),Crystal Meth Anonymous
810	CMB, Cosmic Microwave Background
811	CMBR, Cosmic Microwave Background Radiation
812	CME, Coronal Mass Ejection (usually Sun)
813	CMHC, Canada Mortgage and Housing Corporation
814	CMIIAW, Correct me if I am wrong
815	CMIS- Content Management Interoperability Services,Common management information service
816	CMJ, Christopher Martin-Jenkins (BBC sports commentator)
817	CML- Chemical, Chronic Myelogenous Leukemia (formerly Chronic Myeloid Leukemia)
818	CMM, Capability Maturity Model
819	CMMC, Corps Materiel Management Centre
820	CMML- Chronic MyeloMonocytic Leukemia,Continuous Media Markup Language
821	CMO, Civil-Military Operations
822	CMOC, Civil-Military Operations Centre
823	CMOS- Canadian Meteorological and Oceanographic Society,(The) Chicago Manual of Style,Complementary Metal Oxide Semiconductor
824	CMP, Common [Operating/Operational] Maritime Picture
825	CMP, Canadian Military Pattern truck (World War II)
826	CMPD, Chronic Myeloproliferative Disease
827	CMPD, Charlotte Mecklenburg Police Department
828	CMR- Cameroon (ISO 3166 trigram), Coaxial Main Rotors (helicopter type)
829	CMS- Centers for Medicare and Medicaid Services,The Chicago Manual of Style
830	CMT, Country Music Television
831	CMU- Carnegie Mellon University,Central Michigan University,Concrete Masonry Unit
832	CMW- Marconi's Wireless Telegraph Company of Canada,Canadian Manufacturing Week,Canadian Music Week,Catherine McAuley Westmead (school in New South Wales, Australia),Chicago, Missouri and Western (Railway),Compartmented Mode Workstation,Compton's Most Wanted,Continuous Microwave (processing technology),Custom Maintenance Wizard (Microsoft Office Resource Kit)
833	CMYK, Cyan Magenta Yellow Key/blacK (colour model)
834	CN-(i/s) Canadian National (railway; also the AAR reporting mark for said company), China (ISO 3166 digram),Comoros (FIPS 10-4 country code)
835	CNA- Center for Naval Analyses,Certified Network Administrator,Computer Network Attack,Continental (Casualty Company), National (Fire Insurance Company), and American (Casualty Company), the three companies that merged to form what is now known as CNA Financial
836	CNBC,(a/i) Consumer News and Business Channel
837	CND- Campaign for Nuclear Disarmament,Computer Network Defence
838	CNE- Canadian National Exhibition,Computer Network Exploitation,Certified Network Engineer
839	CNF, Cost and Freight
840	CNI, Communications, Navigation and Identification
841	CNI, Clinical Nursing Intern
842	CNN- Cable News Network,Cellular Nonlinear Network
843	CNO, Computer Network Operations
844	CNR- Canadian National Railway,Combat Net Radio
845	CNV, Copy-Number Variable (genetics)
846	CNY, Chinese yuan renminbi (ISO 4217 currency code)
847	co, Corsican language (ISO 639-1 code)
848	Co, Cobalt
849	CO,many, including Central Office (phone company); see entry, Colorado (postal symbol), Commanding Officer (military)
850	COA, Certificate/Concept Of Analysis,Course Of Action (military)
851	COB, Close Of Business [day]
852	COBRA,Consolidated Omnibus Budget Reconciliation Act of 1985
853	COCOM, Combatant Command (military)
854	COD, Cash On Delivery, Democratic Republic of the Congo (ISO 3166 trigram)
855	CoDA, Co-Dependents Anonymous
856	codec, Coder-Decoder / Compressor-Decompressor / Compression-Decompression algorithm
857	COE, Cab Over Engine (see truck),Common Operating Environment (military)
858	COEA, Cost Operational Effectiveness Analysis (military)
859	COEIA, Combined Operational Effectiveness and Investment Appraisal (military)
860	COFT, Conduct Of Fire Trainer (military)
861	COG, Centre Of Gravity,Current Operations Group (military), Republic of the Congo (ISO 3166 trigram)
862	COGENT, Cognitive Objects within a Graphical EnviroNmenT
863	COIL, Chemical Oxygen Iodine Laser
864	COIN, Counter-Insurgency (military)
865	COK, Cook Islands (ISO 3166 trigram)
866	COL, Colombia (ISO 3166 trigram)
867	COLA, comp.os.linux.announce,Cost Of Living Adjustment
868	COLT, Combat Observation and Lasing Team (military)
869	COM, Comoros (ISO 3166 trigram), Component Object Model
870	COMECON, Council for Mutual Economic Assistance (economic counterpart of the Warsaw Pact, 1949-1991)
871	COMMZ, Communications Zone (military)
872	COMSEC, Communications Security (military)
873	CONAD, U.S. Continental Air Defense Command
874	CONCACAF, Confederation Of North, Central American and Caribbean Association Football
875	CONOPS, Concept of Operations (military)
876	CONUS, Continental United States
877	COO, Chief Operating Officer
878	COP, Colombian peso (ISO 4217 currency code), Common Operating/Operational Picture
879	COPE, U.K. Committee On Publication Ethics
880	COPUS, U.K. Committee on the Public Understanding of Science
881	cor, Cornish language (ISO 639-2 code)
882	CORBA, Common Object Request Broker Architecture
883	CORD,(i/a) Common Operational Requirements Document
884	CORE, Consortium for Oceanographic Research and Education
885	CORG, (U.S.) Combat Operations Research Group
886	COROT, COnvection, ROtation and planetary Transits
887	cos, Corsican language (ISO 639-2 code),Cosine
888	COS, Cooper Ornithological Society
889	COSCOM, Corps Support Command (military)
890	COSER, COoperative SERvice
891	CoT, Car of Tomorrow (former NASCAR race car design)
892	COTS, Commercial Off The Shelf
893	Coy, Company (military unit)Cow
894	CP, Canadian Pacific,Check Point,Command Post,Club Penguin
895	CPA, Certified Public Accountant
896	CPCU,Certified Property Casualty Underwriter
897	CPD, Capabilities Production Document
898	CPE, Certificate of Proficiency in English
899	CPE, Certified Professional Ergonomist
900	CPF, Calibration Parameter File,Canadian Patrol Frigate
901	CPG, Clinical Practice Guideline
902	CPI, CERDEC Command, Power and Integration
903	CPIM, Certification on Production and Inventory Management
904	CPIR,Computationally-Private Information Retrieval
905	CPON, Certified Pediatric Oncology Nurse
906	CPPCC, Chinese People's Political Consultative Conference
907	CPR, Canadian Pacific Railway
908	CPR, Cardiopulmonary resuscitation
909	CPSM, Continuous Phase Shift Modulation
910	CPSU, Communist Party of the Soviet Union
911	CPT, Contingency Planning Team
912	CPU,Contract Postal Unit
913	CPV, Cape Verde (ISO 3166 trigram)
914	CPX, Command Post eXercise
915	CQ, Carrier Qualification,Central Queensland,Charge of Quarters,Congressional Quarterly,Constellation Airlines (IATA airline designator),Northern Mariana Islands (FIPS 10-4 territory code)
916	cr, Cree language (ISO 639-1 code)
917	Cr, Chromium
918	CR- Coral Sea Islands (FIPS 10-4 territory code),Costa Rica (ISO 3166 digram)
919	CRAM, Combined Radiometric Correction Model
920	CRC- Central RTI Component,Chemical Rubber Company,Christian Reformed Church,Control and Reporting Centre,Cyclic Redundancy Check, Costa Rican colón (ISO 4217 currency code),Costa Rica (IOC and FIFA trigram, but not ISO 3166)
921	CRD, Capstone Requirements Document
922	cre, Cree language (ISO 639-2 code)
923	CREB, Cyclic AMP-response Element Binding (protein)
924	CREEP, Committee for the Re-Election of the President, a pejorative nickname used by opponents
925	CRI- China Radio International, Costa Rica (ISO 3166 trigram)
926	CRIPL, Consolidated Remain-In-Place List
927	CRM, Cardiac Rhythm Management,Customer Relationship Management
928	CRO, Croatia (IOC and FIFA trigram, but not ISO 3166)
929	CRP- Committee for the Re-Election of the President,Control and Reporting Post
930	CRT- Cardiac Resynchronization Therapy,Cathode Ray Tube,Chinese Remainder Theorem
931	CRTC, Canadian Radio-television and Telecommunications Commission
932	cs, Czech language (ISO 639-1 code)
933	Cs, Caesium
934	CS- Combat Support,Computer Scientist, Costa Rica (FIPS 10-4 country code),Serbia and Montenegro (ISO 3166 digram; obsolete since 2006)
935	CSA- Canadian Soccer Association,Canadian Space Agency,Canadian Standards Association,Child Support Agency,Command Staff Advisor,Community-supported agriculture,Confederate States of America,Corps Storage Area, Czech Airlines,C/S/A, CINC, Service, and Agency
936	CSC- Closed Spacelike Curve (relativity),Compact system camera,Computer Sciences Corporation,Computer Security Centre,CSCC Canadian Society of Clinical Chemists
937	CSERIAC, (U.S. DoD) Crew Systems Ergonomics Information Analysis Center
938	CSG, Corps Support Group
939	CSI,see entry
940	CSICOP, Committee for the Scientific Investigation of Claims of the Paranormal (became the Committee for Skeptical Inquiry in 2006)
941	CSIP, Commercial Stable Image Platform (AMD)
942	CSK, Czechoslovakia (ISO 3166 trigram; obsolete since 1993)
943	CSL, U.K. Central Science Laboratory
944	CSPI, Center for Science in the Public Interest
945	CSR, Control Supply Rate
946	CSR, Corporate Social Responsibility [1]
947	CSRC, Conflict Studies Research Centre
948	CSRF, Cross-Site Request Forgery
949	CSS- Cascading Style Sheets,Catalina Sky Survey,Central Security Service,Combat Service Support,Confederate States Ship,Content-scrambling system,Cross-site scripting
950	CSSCS, Combat Service Support Control System
951	CST, Central Standard Time (UTC−6 hours)
952	CT, Computed tomography (medical scan also known as a CAT scan),Central Time zone,Chrono Trigger (Computer/Video games), Connecticut (postal symbol),Canterbury (postal symbol),Chhattisgarh (Indian state code)
953	CTBT, Comprehensive [Nuclear] Test Ban Treaty
954	CTC, Closed Timelike Curve (relativity),(U.S.) Combat Training Center
955	CTDB, Compact Terrain Data Base (file format)
956	CTE- Canton and Enderbury Islands (ISO 3166 trigram; obsolete 1984), Chronic traumatic encephalopathy
957	CTGF, connective tissue growth factor
958	CTI, Co-operative Target Identification
959	CTIL, Critical Tracked Items List
960	CTIS, Central Tire Inflation System
961	CTMS, Clinical Trial Management System
962	CTO, Chief Technical Officer,Chief Technology Officer
963	CTS, Clear-To-Send,Collective Training Standards,Communications Technology Service,Contract Technical Services,Conversation Time Sharing,COSMIC Top Secret
964	CTSS, Compatible Time-Sharing System
965	CTU, Counter Terrorist Unit (fictional branch of the Central Intelligence Agency in the television action series 24)
966	CTVT, Canine Transmissible Venereal Tumour
967	cu, Old Church Slavonic language (ISO 639-1 code)
968	Cu, Copper (Latin Cuprum)
969	CU, Carrie Underwood,Cuba (FIPS 10-4 country code; ISO 3166 digram)
970	CUB, Cuba (ISO 3166 trigram)
971	CUCV, Commercial Utility Cargo Vehicle
972	CUP, Cuban peso (ISO 4217 currency code)
973	CUPS, Common Unix Printing System
974	CUPW, Canadian Union of Postal Workers
975	CUREA, Consortium for Undergraduate Research and Education in Astronomy
976	CuW, Copper-tungsten pseudo-alloy (from the chemical symbols of the two component elements)
977	CUW, Curaçao (ISO 3166 trigram)
978	cv, Chuvash language (ISO 639-1 code)
979	CV,many, including curriculum vitae (résumé); see entry
980	CVCC- Combat Vehicle Command and Control,Compound Vortex Controlled Combustion (1970s Honda automobile engine technology)
981	CVE, Cape Verde escudo (ISO 4217 currency code)
982	CVI, Combat Vehicle Identification
983	CVLL, Crypto Variable Logic Label
984	CVR, Cockpit Voice Recorder,Combat Vehicle Reconnaissance
985	CVS, Concurrent Versions System
986	CVSD, Continuous Variable Slope Delta (modulation)
987	CVT, Continuously Variable Transmission
988	CW, Continuous Wave,Clothes Washer, Cook Islands (FIPS 10-4 territory code)
989	CWC, Chemical Weapons Convention
990	CWS, Canadian Wildlife Service
991	CWRU, Case Western Reserve University
992	CX, Christmas Island (ISO 3166 digram),One Hundred and Ten (in Roman numerals)
993	CXR, Christmas Island (ISO 3166 trigram)
994	cy, Welsh language (ISO 639-1 code)
995	CY, Calendar year, Cyprus (ISO 3166 and FIPS 10-4 country code digram)
996	cym, Welsh language (ISO 639-2 code)
997	CYM, Cayman Islands (ISO 3166 trigram)
998	CYP, Cyprus (ISO 3166 trigram),Cyprus pound (ISO 4217 currency code)
999	CZ, Combat Zone, Czech Republic (ISO 3166 and FIPS 10-4 country code digram)
1000	CZE, Czech Republic (ISO 3166 trigram)
1001	CZK, Czech koruna (ISO 4217 currency code)
1002	CZF, (Christian Zombie Fan)
1003	CZMA, (US) Coastal Zone Management Act
1004	d, Deci
1005	D, Deuterium
1006	da, Danish language (ISO 639-1 code),deca
1007	DA, Denmark (FIPS 10-4 country code), Debtors Anonymous, U.S. Department of the Army,District Attorney
1008	DAB,Digital Audio Broadcasting
1009	DACT, Data Automated Communications Terminal,Dissimilar Air Combat Training
1010	DAES, Defence Acquisition Executive Summary,(UK MoD) Directorate of Analysis, Experimentation and Simulation
1011	DAF, Dissolved Air Flotation, a technique used in water treatment
1012	DAFIF, Digital Aeronautical Flight Information File
1013	DAK, Disney's Animal Kingdom
1014	dan, Danish language (ISO 639-2 code)
1015	DAO, Division Ammunition Officer
1016	DAQ, Data acquisition, Delivered Audio Quality
1017	DARE, Drug Abuse Resistance Education
1018	DARO,(i/a) (U.S.) Defense Airborne Reconnaissance Office
1019	DARPA, U.S. Defense Advanced Research Projects Agency
1020	DART, Disaster Assistance Response Team,Dublin Area Rapid Transit
1021	DAS, Defensive Aids Suite
1022	DASD, (U.S.) Deputy Assistant Secretary of Defense
1023	DASL, Datapoint's Advanced Systems Language
1024	DAU, (U.S.) Defense Acquisition University
1025	DAWN, (U.S.) Drug Abuse Warning Network
1026	dB, Decibel
1027	Db, Dubnium
1028	DB, Database,Deutsche Bahn
1029	DBA, De Bellis Antiquitatis (miniature wargaming rules)
1030	DBBL, (U.S. Army Simulation Center) Dismounted Battlespace Battle Laboratory
1031	DBCS, Double Byte Character Set
1032	DBDO, Desert BDO
1033	DBE, Dame Commander of the Order of the British Empire
1034	DBF, Detection By Fire (weapon launch signature)
1035	DBM, De Bellis Multitudinis (miniature wargaming rules),Detection By Movement (military target)
1036	DBR, De Bellis Renationis (miniature wargaming rules)
1037	DBRA, Davis-Bacon Related Acts
1038	DBS, Direct Broadcast Services (television)
1039	DC, da capo,Italian Democrazia Cristiana,Digital Compass,Direct Current, District of Columbia (postal symbol), Douglas Aircraft Company,Dublin Core,Duty Cycle
1040	DCA, Defensive Counter Air,Drum Corps Associates, DiChloroAcetate, Ronald Reagan Washington National Airport (IATA code)
1041	DCAA, (U.S.) Defense Contract Audit Agency
1042	DCAS, Devon and Cornwall Archery Society
1043	DCC, Dallas Christian College
1044	DCC, Digital Command Control (model railroading),Direct Client-to-Client (Internet Relay Chat),Dismounted Close Combat
1045	DCCP, Datagram Congestion Control Protocol
1046	DCD, [Organ] Donation after Cardiac Death
1047	DCE, Data Communication Equipment
1048	DCFC, Death Cab for Cutie
1049	DCI, Detection, Classification and Identification,Drum Corps International,Duellists' Convocation International, now known simply by the initials
1050	DCIM, Digital Camera Images
1051	DCIMS, Dental Classification Information Management System,Dismounted Combat Identification Marking System
1052	DCL,Disney Cruise Line
1053	DCN,Deacon
1054	DCOM,Disney Channel Original Movie
1055	DCOP, Desktop Communication Protocol
1056	DCSOPS, Deputy Chief of Staff for Operations and plans
1057	DCW, Digital Chart of the World
1058	DCYSC, Discovery Channel Young Scientist Challenge
1059	DD,many, including due diligence and dear daughter (increasingly prevalent on social mailing lists, blogs, and bulletin boards); see entry
1060	DDA- Digital Differential Analyzer (graphics algorithm),Digital Differential Analyzer,Deputy District Attorney
1061	DDD- Data Display Debugger,Digital Digital Digital (CD mastering)
1062	DDL, Digital Data Link
1063	DDN, U.S. Defense Data Network
1064	DDoS, Distributed Denial of Service
1065	DDS, Doctor of Dental Surgery
1066	DDT- Dichloro-Diphenyl-Trichloroethane (insecticide),Dynamic Debugging Tool (computing),DE[edit]
1067	de, German language (ISO 639-1 code)
1068	DE, Delaware (postal symbol),Germany (ISO 3166 digram)
1069	DEA, Drug Enforcement Administration
1070	DEA, Drug Enforcement Agency
1071	DEC,(a/i) Department of Environmental Conservation,Digital Equipment Corporation,Disasters Emergency Committee
1072	DeCA, (U.S.) Defense Commissary Agency
1073	DECSIM, Model DEComposition and SIMulation algorithm,Directed Energy Combat SIMulation
1074	DECT, Digital European Cordless Telephone
1075	DEFCON, Defence readiness condition
1076	DEFRA, (UK) Department for Environment, Food and Rural Affairs
1077	DELT, Dual Ended Line Test (ing)
1078	DEM, Data Exchange Mechanism,Digital Elevation Model
1079	DEN, Denmark (IOC and FIFA trigram, but not ISO 3166)
1080	DEPSECDEF, (U.S.) Deputy Secretary of Defense
1081	DERA, British Defence Evaluation and Research Agency (1995-2001)
1082	DES, Deep Ecliptic Survey
1083	deu, German language (ISO 639-2 code)
1084	DEU, Germany (ISO 3166 trigram)
1085	DFAS, (U.S.) Defense Finance and Accounting Service
1086	DFCB, Data Format Control Book
1087	DfID, UK Department for International Development
1088	DFM, Dynamic Flowgraph Methodology
1089	DFM,(ii) Discrete Field Model see Superluminal motion
1090	DFSP, Dermatofibrosarcoma protuberans
1091	DfT, UK Department for Transport
1092	DFTBA, Don't Forget To Be Awesome- a term commonly used by the Vlogbrothers
1093	DGPS, Differential GPS
1094	DGZ, Desired Ground Zero
1095	DH, dear husband (increasingly prevalent on social mailing lists, blogs, and bulletin boards),Designated hitter
1096	DHA, DocosaHexaenoic Acid
1097	DHHS, (U.S.) Department of Health and Human Services
1098	DHL, Dalsey, Hillblom, and Lynn (courier service)
1099	DHRA, (U.S.) DoD Human Resources Activity
1100	DHS, U.S. Department of Homeland Security
1101	DHSS, UK Department of Health and Social Security
1102	DHTFYSS, U.S. Don't Have Time For You Silly S****
1103	DHY, Dahomey (ISO 3166 trigram; became BEN for Benin in 1977)
1104	DIA, U.S. Defense Intelligence Agency
1105	DIAC, Department of Immigration and Citizenship (Australia) [1]
1106	DiC,Design Island Centre (computing usually used in a teaching situation)
1107	DICASS, DIrectional Command Activated Sonobuoy System
1108	DILLIGAD, Do I Look Like I Give A Damn? (military shorthand, slightly less offensive than the following)
1109	DILLIGAF, Do I Look Like I Give A Fuck? (military shorthand)
1110	DIF, Data Interchange Format
1111	DIFAR, DIrectional Frequency Analysis and Recording
1112	DIME, Dense Inert Metal Explosive
1113	DIMM, Dual In-line Memory Module (computing)
1114	DINKY, Double Income, No Kids Yet
1115	DIP, Dual In-line Package (electronics)
1116	DIPS, Defense independent pitching statistics
1117	DIR, Defence Industrial Research
1118	DIS- Defence Intelligence Staff,(U.S.) Defense Investigative Service,Distributed Interactive Simulation,Draft International Standard (ISO)
1119	DISA- U.S. Defense Information Systems Agency,Distinguished Individual Service Award
1120	DISCOM, Division Support Command
1121	DISE, Deployable Intelligence Support Element
1122	DISSTAF, DIS Search and Target Acquisition Fidelity experiment
1123	DITY,(i/a) Do-It-Yourself
1124	div, Dhivehi language (ISO 639-2 code)
1125	DIVAD, Division Air Defence
1126	DIY, Do It Yourself
1127	DJ, Disc Jockey,Dinner Jacket, Djibouti (ISO 3166 digram; FIPS 10-4 country code)
1128	DJD, Degenerative Joint Disease,Dublin Julian Day,Discoveries in the Judaean Desert
1129	DJF, Djibouti franc (ISO 4217 currency code)
1130	DJI, Djibouti (ISO 3166 trigram)
1131	DJS, Director, Joint Staff
1132	DK, Denmark (ISO 3166 digram)
1133	DKK, Danish krone (ISO 4217 currency code)
1134	DL,Dexter's Laboratory
1135	DLA, U.S. Defense Logistics Agency, Dental Laboratories Association
1136	DLIC, Detachment Left-In-Contact
1137	DLIR, Depot-Level Inspection and Repair
1138	DLL, Dynamic Link Library
1139	DLPMC, DorsoLateral PreMotor Cortex
1140	DLR, Deutsches Zentrum für Luft- und Raumfahrt (German, German Aerospace Centre),Docklands Light Railway
1141	DLRP, Data Link Reference Point
1142	DLS, Deep Lens Survey
1143	DLSA, (U.S.) Defense Legal Services Agency
1144	DLSc, Diploma in Library Science
1145	DLSC, U.S. Defense Logistics Services Center,U.S. Defense Logistics Support Command,Department of Library Special Collections (Western Kentucky University Libraries),Direct Loan Servicing Center,Directorate of Land Strategic Concepts (Canada),Dominican Lay Scholars Community
1146	DLTBGYD,Don't let the bastards grind you down
1147	DM- Dominica (ISO 3166 digram), Dungeon Master (role-playing games)
1148	DMA- Designated market area (primarily a U.S. term),U.S. Defense Mapping Agency (became NIMA, then NGA),Direct Memory Access (computing), Dominica (ISO 3166 trigram)
1149	DMC, (U.S.) Defense Management Council
1150	DMCA,Digital Millennium Copyright Act
1151	DMI, Desktop Management Interface (computing)
1152	DMM,Digital Multimeter
1153	DMOC, Distributed Mission Operations Centre
1154	DMPA, (U.S.) Defense Medical Programs Activity
1155	DMPFC, DorsoMedial PreFrontal Cortex
1156	DMPK, Drug Metabolism and Pharmacokinetics
1157	DMRB, Design Manual for Roads and Bridges
1158	DMS, U.S. Defense Message System
1159	DMSP, U.S. Defense Meteorological Satellite Program
1160	DMT, Dimethyltryptamine
1161	DMU, Diesel Multiple Unit, a method of connecting self-propelled railway vehicles together to form a train under the control of one driver.
1162	DMV, Department of Motor Vehicles
1163	DMZ, DeMilitarized Zone
1164	DN, Deacon
1165	DNA, U.S. Defense Nuclear Agency,DeoxyriboNucleic Acid,Douglas Noël Adams
1166	DNAW, Day Night All Weather
1167	DND, Department of National Defence (Canada),Do Not Disturb
1168	DNDi, Drugs for Neglected Diseases initiative
1169	DNDO, U.S. Domestic Nuclear Detection Office
1170	DNM, Defence Nuclear Material
1171	DNK, Denmark (ISO 3166 trigram)
1172	DNR, Do Not Resuscitate
1173	DNS, Domain Name System
1174	DO, Dominica (FIPS 10-4 country code),Dominican Republic (ISO 3166 digram), Doctor of Osteopathic Medicine
1175	DOA, Dead On Arrival,Dead or Alive
1176	DOB, Date Of Birth
1177	DOD, U.S. Department of Defense
1178	DODAF, U.S. Department of Defense Architectural Framework
1179	DoDD, U.S. Department of Defense Directive
1180	DoDEA, (U.S.) Department of Defense Education Activity
1181	DOE,(i/a) U.S. Department of Energy
1182	DOHC, Dual-OverHead-Cam engine
1183	DOI, Digital Object Identifier,U.S. Department of the Interior
1184	DOMS, (U.S.) Director of Military Support
1185	DOP, Dominican peso (ISO 4217 currency code)
1186	DORA, Defence of the Realm Act
1187	DOS, Denial of Service (DoS, cf. DDoS),Density of State,Disk Operating System
1188	DOT, Department of Transportation (U.S. federal or state),Damage Over Time (common in World of Warcraft)
1189	DOTA,short-form for DEFENSE OF THE ANCIENTS a popular online epic game
1190	DotD, Deal of the Day (marketing gimmick)
1191	DOTMLPF, Doctrine, Organization, Training, Materiel, Leadership, Personnel, and Facilities (mnemonic)
1192	DOW, Died of Wounds
1193	DP, Division de production (Algerian petroleum company)
1194	DP, Decision Point,Dynamic Programming
1195	DPA, UK Defence Procurement Agency
1196	DPCO, Double-Pole Change Over
1197	DPDT, Double-Pole Double-Throw
1198	DPICM, Dual-Purpose Improved Conventional Munition
1199	DPKO, UN Department for Peacekeeping Operations
1200	DPMO, (U.S.) Defense Prisoner of War/Missing Personnel Office
1201	DPPDB, Digital Point Positioning Database
1202	DPRE, Displaced Person or Refugee (plural Displaced Persons and Refugees) (originally Displaced Persons, Refugees, Evacuees)
1203	DPRK, Democratic People's Republic of Korea
1204	DPST, Double-Pole Single-Throw
1205	DQ, Dairy Queen, Jarvis Island (FIPS 10-4 country code)
1206	DR, Dead Reckoning, Dominican Republic (FIPS 10-4 country code), Danmarks Radio (Danish Broadcasting Corporation)
1207	DRA, Defence Research Agency (UK, 1991-1995),Democratic Republic of America
1208	DRC, Democratic Republic of the Congo
1209	DRDC, Defence Research & Development Canada
1210	DREA,(i/a) Defence Research Establishment Atlantic (obsolete 2002)
1211	DRES,(i/a) Defence Research Establishment Suffield (obsolete 2002)
1212	DRET,(i/a) Defence Research Establishment Toronto (obsolete 2002)
1213	DREV,(i/a) Defence Research Establishment Valcartier (obsolete 2002)
1214	DRI, Detection, Recognition, Identification,Dietary Reference Intake
1215	DRIC,(i/a) (U.S.) Defense Research Information Center
1216	DRL, Daytime Running Lights,Dorman Roberts Ltd.
1217	DRM, Digital Rights Management
1218	DRMS, (U.S.) Defense Revitalization and Marketing Service
1219	DRPR, Drawing Practices
1220	DRT, Document Related Technologies
1221	Ds, Darmstadtium
1222	DS- Dear son (increasingly prevalent on social mailing lists, blogs, and bulletin boards),Defence Scientist,Direct Support, Dust Storm (METAR Code)
1223	DSA- (U.S.) Defense Support Activities,Division Support Area
1224	DSAA- (U.S.) Defense Security Assistance Agency,Driving Schools Association of the Americas,DECT Standard Authentication Algorithm
1225	DSAS, Disney Sing Along Songs
1226	DSB, (U.S.) Defense Science Board
1227	DSC- Differential Scanning Calorimeter,Digital Selective Calling,Digital Still Camera,Distinguished Service Cross,Doctor of Surgical Chiropody (obsolete),Document structure convention (PostScript programming),Dynamic Stability Control
1228	DSCS, U.S. Defense Satellite Communications System
1229	DSCSOC, DSCS Operations Center
1230	DSD, Defence Studies Department (King's College, London)
1231	DSE, Dry Sheep Equivalent
1232	DSG,Direct-Shift Gearbox
1233	DSID, Dismounted Soldier Identification System
1234	DSL, Digital Subscriber Line
1235	DSLR, Digital single-lens reflex (camera)
1236	DSM, Diagnostic and Statistical Manual of Mental Disorders
1237	DSN, Deep Space Network
1238	DSO, Distinguished Service Order (British military decoration)
1239	DSP- Defense Standardization Program,Defense Support Program,Digital Signal Processing
1240	DSPL, Design Specialists and Plans Language
1241	DSR, Deformed Special Relativity
1242	DSRV- Deaf Sports Recreation Victoria,Deep Submergence Rescue Vehicle
1243	DSS- Digitized Sky Survey,Discarding-Sabot Shell (ammunition)
1244	DST, Daylight saving time
1245	DSTL, British Defence Science and Technology Laboratory
1246	DSWA, (U.S.) Defense Special Weapons Agency
1247	DTA, Dental Technologists Association
1248	DTD, Digital Terrain Data
1249	DTE, Data Terminal Equipment,Down To Earth
1250	DTG, Date-Time Group
1251	DTH, Direct To Home (television)
1252	DTI, UK Department of Trade and Industry
1253	DTIC, (U.S.) Defense Technical Information Center
1254	DTL, Diode-Transistor Logic (electronics)
1255	DTMF, Dual-tone multi-frequency signaling
1256	DTLOMS, Doctrine, Training, Leader development, Organization, Materiel, and Soldier (mnemonic)
1257	DTO, Disruptive Technology Office (was ARDA)
1258	DTOMLS, Doctrine, Training, Organization, Materiel, Leader and Soldier development (mnemonic)
1259	DTR, Determine The Relationship
1260	DTSA, (U.S.) Defense Technology Security Administration
1261	DU- Depleted Uranium, Dust (METAR Code)
1262	DUI- Data Use Identifier,Data Use Institute,Davis Unified Ignition,Diving Unlimited International,Documento Único de Identidad,Documento Unico de Importación,Driving Under the Influence,Duke University Improv
1263	DUMBO, Down Under the Manhattan Bridge Overpass (Brooklyn neighborhood)
1264	DUSD, (U.S.) Deputy Under-Secretary of Defense
1265	dv, Dhivehi language (ISO 639-1 code)
1266	DVD, Digital Versatile Disk (was Digital Video Disk)
1267	DVLC, UK Driver and Vehicle Licencing Centre
1268	DVM, Doctor of Veterinary Medicine
1269	DVO, Direct View Optics
1270	DVOM,Digital Volt-Ohm Meter
1271	DVP,various meanings (disambiguation page)
1272	DW, Drum Workshop
1273	DWG, Divisional Wargame (military simulation)
1274	DWI, Dance With Intensity,Danish West Indies,Diffusion-weighted imaging,Direct water injection,Disaster Welfare Inquiry,Drinking Water Inspectorate,Driving While Intoxicated/Impaired
1275	DWM, Doctor Who Magazine
1276	DWIM, Do What I Mean
1277	DWTS, Dancing with the Stars
1278	DWW, Down with Webster
1279	DX- Dexterity (role-playing games), DeXtrorphan,Distant (radio), D-Generation X (professional wrestling stable)
1280	DXA, Dual-energy X-ray Absorptiometry
1281	DXM, DeXtroMethorphan
1282	Dy, Dysprosium
1283	DY, Dahomey (ISO 3166 digram; obsolete since 1977)
1284	dz, Dzongkha language (ISO 639-1 code)
1285	DZ, Algeria (ISO 3166 digram),Drizzle (METAR Code), Drop Zone
1286	DZA, Algeria (ISO 3166 trigram)
1287	DZD, Algerian dinar (ISO 4217 currency code)
1288	dzo, Dzongkha language (ISO 639-2 code)
1289	E, East
1290	EA, Electronic Attack,Emotions Anonymous,Engagement Area,Electronic Arts,Enrolled Agent,Environmental Assessment,Enterprise Architect, Exaampere
1291	EABU, Explain Acronyms Before Use
1292	EAC, Echelons Above Corps
1293	EAPC, Euro-Atlantic Partnership Council
1294	EASA, European Aviation Safety Agency
1295	EAST, Experimental Advanced Superconducting Tokamak
1296	EBD, Electronic Brake Distribution
1297	EBE, Extraterrestrial Biological Entity
1298	EBO,(i/a) Effects Based Operations,Encyclopædia Britannica Online,European Board of Ophthalmology
1299	EBSA, Employee Benefits Security Administration
1300	EBW, Electron Beam Welding
1301	EBW, Exploding BridgeWire
1302	EC- Ecuador (ISO 3166 digram; FIPS 10-4 country code), Electronic Combat,European Community (see EEC), Exacoulomb
1303	ECB- England (and Wales) Cricket Board,European Central Bank
1304	ECBR, European Coalition for Biomedical Research
1305	ECASS, European Centre for Analysis in the Social Sciences [1]
1306	ECCM, Electronic Counter-Counter-Measures
1307	ECFS, Electronic Case Filing System
1308	ECG, Electrocardiogram
1309	ECHO- Each Community Helps Others (EPA programme),Educational Concerns for Hunger Organization,European Commission Host Organization,European Commission Humanitarian aid Office, Exchange Clearing House,Expanded Characteristic Option, Explanatory Coherence by Harmony Optimization
1310	ECHR, European Convention on Human Rights
1311	ECJ, European Court of Justice
1312	ECL, Emitter Coupled Logic (electronics)
1313	ECM- Electronic Counter-Measures,Enterprise Content Management
1314	ECommHR, European Commission on Human Rights
1315	ECS- Emergency Contact System,Enhanced Chip Set (computing),EOSDIS Core System,Extended Chip Set (computing)
1316	ECSC, European Coal and Steel Community (distant ancestor of the EU)
1317	ECT, ElectroConvulsive Therapy
1318	ECtHR, European Court of Human Rights
1319	ECU- Ecuador (ISO 3166 trigram), European Currency Unit (ancestor of the euro)
1320	ECW- Eastern Championship Wrestling/Extreme Championship Wrestling,ED[edit]
1321	EDA, European Defence Agency
1322	EDAC, Error Detection And Correction
1323	EDCS, Environmental Data Coding Specification
1324	EDD- Earliest due date,Electron-detachment dissociation,Elena Delle Donne (American basketball player),Employment Development Department (California state agency),End-diastolic dimension,Expected Date of Delivery (pregnancy)
1325	EDECSIM, Extended Directed Energy Combat Simulation
1326	EDGAR, Electronic Data Gathering, Analysis, and Retrieval (U.S. Securities and Exchange Commission filings database)
1327	EDH, Eastman Dental Hospital
1328	EDS- Electronic Data Systems,Electronic Differential System
1329	EDSA, Epifanio de los Santos Avenue (a major thoroughfare in Manila with great significance to post-1980 Philippines history)
1330	EDT, Eastern Daylight Saving Time (UTC−4 hours)
1331	EDTA- Electric Drive Transportation Association, EthyleneDiamineTetraAcetic acid,EE[edit]
1332	ee, Ewe language (ISO 639-1 code)
1333	EE- Estonia (ISO 3166 digram; from the country's native name of Eesti), Electrical engineering,Electrical Engineer,E&E, Escape and Evasion (training)
1334	EEC, European Economic Community (predecessor of the EU)
1335	EEG, ElectroEncephaloGram
1336	EEK, Estonian kroon (ISO 4217 currency code)
1337	EENT, End Evening Nautical Twilight
1338	EEO, Equal Employment Opportunity
1339	EEOC, (U.S.) Equal Employment Opportunity Commission
1340	EEZ, Economic Exclusion Zone or Exclusive Economic Zone
1341	EF- Electro-focus (Canon lens mount),Entry Foyer, Exafarad
1342	EFF, Electronic Frontier Foundation
1343	EFL,English as a Foreign Language
1344	EFM, Enterprise Feedback Management
1345	EFOA, European Fuel Oxygenates Association
1346	EFSA, European Food Safety Authority
1347	EFT, Electronic Fund Transfer
1348	EFTA- European Free Trade Area, European Free Trade Association
1349	EFV, Expeditionary Fighting Vehicle
1350	EG, Egypt (ISO 3166 digram; FIPS 10-4 country code)
1351	EGBUS, External Genitalia, Bartholin's glands, Urethra & Skene's glands
1352	EGCG, EpiGalloCatechin-3-Gallate
1353	EGIS, Erieye Ground Interface Segment
1354	EGP, Egyptian pound (ISO 4217 currency code)
1355	EGRET, Energetic Gamma-Ray Experiment Telescope
1356	EGY, Egypt (ISO 3166 trigram)
1357	EH, Exahenry,Western Sahara (ISO 3166 digram)
1358	EHA- Education for All Handicapped Children Act (U.S. federal legislation; since superseded by the Individuals with Disabilities Education Act), Emotional Health Anonymous
1359	EHF, Extremely High Frequency
1360	EHR, Equipment History Record
1361	Ei, Exbi
1362	EI, Ireland (FIPS 10-4 country code; from Éire)
1363	EIA, Environmental Impact Assessment
1364	EIAH,Environnements Informatiques pour l'Apprentissage Humain
1365	EIAH,Encyclopedia of Iranian Architectural History
1366	EIC,East India Company
1367	EICS,East India Company's Service
1368	eID,electronic ID
1369	EIRP, Effective Isotropic Radiated Power
1370	EIS, Environmental Impact Statement
1371	EJ, Exajoule
1372	EK, Equatorial Guinea (FIPS 10-4 country code),Exakelvin
1373	EKG, Electrocardiogram (from German Elektrokardiogramm)
1374	EKMS, Electronic Key Management System
1375	el, Greek language (ISO 639-1 code)
1376	EL, Exalitre
1377	ELF-(a/i) Earth Liberation Front,Endangered Language Fund,Eritrean Liberation Front,Executable and Linkable Format,Extremely Low Frequency
1378	ELINT, Electronic Intelligence
1379	ell, Greek language (ISO 639-2 code)
1380	ELL, English Language Learner
1381	ELM, Edge-Localised Mode (plasma physics)
1382	ELO, Electric Light Orchestra
1383	ELP- Emerson, Lake & Palmer,European Left Party
1384	ELSS, Emergency Life Support Stores
1385	ELT, Emergency Locator Transmitter
1386	Em, Exametre
1387	EM, ElectroMagnetism/ElectroMagnetic
1388	EMA,(i/a) European Medicines Agency
1389	EMC- Electric Membership Corporation,Electromagnetic Compatibility,Electro-Motive Corporation,European Muon Collaboration,Evergreen Marine Corporation
1390	EMCON, (Electromagnetic) Emissions Control
1391	EMD- General Motors Electro-Motive Division,Engineering and Manufacturing Development,European Missile Defence
1392	EMDG, Euro-Missile Dynamics Group
1393	EMDR, Eye Movement Desensitisation and Reprocessing
1394	EMEA, Europe, Middle East and Africa
1395	EMF- Electromotive force,Epsom Mad Funkers (1990s-2000s indie dance band)
1396	EMG, ElectroMyoGraph
1397	EMO, Emergency Measures Organisation- Emotional
1398	EMP, ElectroMagnetic Pulse
1399	EMS, Emergency Medical Services
1400	EMT, Emergency Medical Technician
1401	EMU, Electric Multiple Unit,a method of connecting self-propelled railway vehicles together to form a train under the control of one driver.
1402	en, English language (ISO 639-1 code)
1403	EN- Corps of Engineers, Estonia (FIPS 10-4 country code),Exanewton
1404	ENCODE, Encyclopedia of DNA Elements (human genome data project)
1405	ENE, East North-East
1406	eng, English language (ISO 639-2 code)
1407	ENG, England (FIFA trigram; not eligible for an ISO 3166 or IOC trigram)
1408	ENT, Ear, Nose and Throat
1409	ENTEC, Euro NATO Training Engineer Centre
1410	ENVL, Envelope
1411	ENY, Enemy
1412	eo, Esperanto language (ISO 639-1 code)
1413	EO- Electro-Optics,Engagement Operations
1414	EOD, Explosive Ordnance Disposal
1415	EOG, ElectroOculoGraphy
1416	EOS- Earth Observation Satellite,(a/i) Electro-Optical System, Canon's autofocusing system for film and digital SLR cameras, Electrophoresis Operations in Space, a space manufacturing project of the McDonnell Douglas Astronautics Company
1417	EOSAT, Earth Observation Satellite
1418	EOSDIS,(a/i) Earth Observation Satellite Data and Information System
1419	EOTS- Electro-Optical Tactical Sensor,(a/i) Eye Of The Storm (World of Warcraft)
1420	EOM, End of Message
1421	EP, European Parliament
1422	EP, Extended play
1423	EPA- EicosaPentaenoic Acid, Environmental Protection Agency
1424	EPCOT, Experimental Prototype Community Of Tomorrow
1425	EPCR- Endothelial protein C receptor,European Professional Club Rugby
1426	EPGS, EOS Polar Ground Sites
1427	EPIRB,(a/i) Emergency Position Indicating Radio Beacon
1428	EPL, English Premier League
1429	epo, Esperanto language (ISO 639-2 code)
1430	EPOS, Electronic Point Of Sale
1431	EPPA, Employee Polygraph Protection Act
1432	EPR, European Pressurised [Nuclear] Reactor
1433	EPW- Earth Penetrator Weapon/Warhead,Economic and Political Weekly (Indian publication),Enemy Prisoner of War,EQ[edit]
1434	EQ, Emotional Quotient
1435	EQG, Equatorial Guinea (FIFA trigram, but not IOC or ISO 3166)
1436	Er, Erbium
1437	ER- Emergency Room, Eritrea (ISO 3166 digram; FIPS 10-4 country code)
1438	ERA- Earned run average,Engineering Research Associates,Equal Rights Amendment,English Racing Automobiles,European Railway Agency
1439	ERCIM,(a/i) European Research Consortium for Informatics and Mathematics
1440	ERI, Eritrea (ISO 3166 trigram)
1441	ERLAWS, Eastern Ruapehu Lahar Alarm and Warning System
1442	ERN, Eritrean nakfa (ISO 4217 currency code)
1443	EROS, Earth Resources Observation System
1444	ERP, Engineer Regulating Point
1445	ERR, Eesti Rahvusringhääling
1446	ERS, Earth Resources Survey
1447	ERTS, Earth Resources Technology Satellite (became Landsat)
1448	ERV, Endogenous RetroVirus
1449	es, Spanish language (ISO 639-1 code)
1450	Es- Einsteinium,Exasecond
1451	ES- El Salvador (FIPS 10-4 country code), Electronic warfare Support, Exasiemens,Spain (ISO 3166 digram; from the country's native name of España)
1452	ESA- Electro-Spark Alloying,Endangered Species Act,European Space Agency
1453	ESC- Embryonic Stem Cell,Electronic Stability Control
1454	ESD, ElectroStatic Discharge
1455	ESDP, European Security and Defence Policy
1456	ESE, East South-East
1457	ESH, Western Sahara (ISO 3166 trigram)
1458	ESL, English as a Second Language
1459	ESM, Electronic warfare Support Measures
1460	ESO, European Southern Observatory
1461	ESOL, English for Speakers of Other Languages
1462	ESP- Electronic Stability Program,Extra-sensory perception, Spain (ISO 3166 trigram)
1463	ESPGHAN,European Society for Paediatric Gastroenterology, Hepatology and Nutrition
1464	ESPN, Entertainment and Sports Programming Network
1465	est, Estonian language (ISO 639-2 code)
1466	EST- Eastern Standard Time (UTC−5 hours), Estonia (ISO 3166 trigram)
1467	ESU, Emergency Services Unit
1468	ESV, Engineer Support Vehicle
1469	et, Estonian language (ISO 639-1 code)
1470	ET- Ethiopia (ISO 3166 digram; FIPS 10-4 country code)
1471	Exatesla- Extra Terrestrial
1472	ETB, Ethiopian Birr (ISO 4217 currency code)
1473	ETF, Emergency Task Force (a special police unit, also jocularly said to stand for Extra-Thick Fuzz)
1474	ETH, Ethiopia (ISO 3166 trigram)
1475	ETI, Extra-Terrestrial Intelligence
1476	ETLA, Extended TLA
1477	ETM- Electronic Technical Manual,Enhanced Thematic Mapper
1478	ETOPS, Extended-range Twin-engine Operational Performance Standards (aviation)
1479	ETT, Embedded Training Team
1480	eu, Basque language (ISO 639-1 code)
1481	Eu, Europium
1482	EU- Europa Island (FIPS 10-4 country code), European Union
1483	EUCOM, (U.S.) European Command
1484	EUR, euro (ISO 4217 currency code)
1485	eus, Basque language (ISO 639-2 code)
1486	EUUSA, European Union and United States of America
1487	EV, Exavolt
1488	EVA- Earned Value Analysis,Economic value added,Ethylene-Vinyl Acetate,Extra-Vehicular Activity
1489	EVIL, Electronic viewfinder (with) interchangeable lens (a type of digital camera)
1490	EW, Electronic Warfare, Exawatt
1491	ewe, Ewe language (ISO 639-2 code)
1492	EWR, Newark Liberty International Airport (IATA airport code)
1493	EWTN, Eternal Word Television Network
1494	EXFOR, Experimental Force (military)
1495	EXREP, Expeditious Repair (SM&R code)
1496	EZ, Czech Republic (FIPS 10-4 country code), Extraction Zone
1497	f, Femto
1498	F, Farad,Fluorine
1499	fa, Persian language (ISO 639-1 code)
1500	FA,Food Addicts in Recovery Anonymous
1501	fA, Femtoampere
1502	FA, Field Artillery,Financial Aid,Football Association (England)
1503	FAA, U.S. Federal Aviation Administration,Financial Aid Administrator,Fleet Air Arm,Functional Area Analysis
1504	FAAD, Forward Area Air Defence
1505	FAADEZ, Forward Area Air Defence Engagement Zone
1506	FAAN, Fellow of the American Academy of Neurology
1507	FAAFP,Fellow of the American Academy of Family Physicians
1508	FAAN, Fellow of the American Academy of Nursing
1509	FAAQ,(a/i) Frequently Asked and Anticipated Questions (cf. FAQ)
1510	FAASV, Field Artillery Ammunition Supply Vehicle
1511	FAB, Feline Advisory Bureau (UK feline charity)
1512	FAC, Forward Air Controller,Front of Allies for Change,Frontal Affinity Chromatography,Full Aperture Calibrator
1513	FACA, (US) Federal Advisory Committee Act
1514	FACH, Fuerza Aérea de Chile
1515	FACN, Fellow of the American College of Nutrition
1516	FACP, Fellow of the American College of Physicians
1517	FACS, Fellow of the American College of Surgeons, Formal Aspects of Computing Science,Fluorescent-activated cell sorting
1518	FACTS, Flexible Alternating Current Transmission System
1519	FAD, Flavin Adenine Dinucleotide,Fuck A Duck, Funding Authorization Document
1520	FAH, Federation of American Hospitals,Fine Arts and Humanities,Foreign Affairs Handbook
1521	FAM, Foreign Affairs Manual
1522	fao, Faroese language (ISO 639-2 code)
1523	FAO, Food and Agriculture Organization
1524	FAPA,Fellow of the American Psychological Association
1525	FAPHA,Fellow of the American Public Health Association
1526	FARP, Forward Arming and Refuelling Point / Forward Area Rearm/refuel Point
1527	fas, Persian language (ISO 639-2 code)
1528	FAS, Federation of American Scientists,Fetal Alcohol Syndrome
1529	FASCAM, Family of Scatterable Mines[1]
1530	FASD, Fetal Alcohol Spectrum Disorder
1531	FASEB,(a/i) Federation of American Societies for Experimental Biology
1532	FAT, Field Artillery Tractor,File Allocation Table
1533	FAVS, Future Armoured Vehicle System
1534	FAW, Football Association of Wales
1535	FB,Facebook, An on-line social network
1536	FBCS, Fellow of the British Computer Society
1537	FBI, Federal Bureau of Investigation
1538	FBIS, Foreign Broadcast Information Service
1539	FBIDST, Fellow of the British Institute of Dental and Surgical Technologists
1540	FBM, Board foot
1541	FBR- Fast Breeder Reactor,Foundation for Biomedical Research,Friedman, Billings, Ramsey (now known as Arlington Asset Investment)
1542	FBS-Federal Bureau of Statistics (Pakistan),Fetal bovine serum,Football Bowl Subdivision (U.S. college football),Fukuoka Broadcasting Corporation,FC[edit]
1543	fC, Femtocoulomb
1544	FC- Fire Control,Football Club, Funnel Cloud (METAR Code)
1545	FCA- Fellowship of Christian Athletes,Fiat Chrysler Automobiles,Fraction of Combat Active forces
1546	FCC, U.S. Federal Communications Commission
1547	FCE, First Certificate in English
1548	FCF, Financial Free Cash Flow
1549	FCLA,Fraud Claims Law Associate
1550	FCM- Federation of Canadian Municipalities,Fogarty's Cove Music
1551	FCO, UK Foreign and Commonwealth Office
1552	FCS- Football Championship Subdivision (U.S. college football),Future Combat System
1553	FCW, Florida Championship Wrestling
1554	FCZ, Forward Combat Zone
1555	FD, Falun Dafa
1556	FDA, Food and Drug Administration (U.S.)
1557	FDC, Federal Detention Center (U.S.),Fire Direction Centre
1558	FDDI, Fibre Distributed Data Interface
1559	FDBK,(I) Feedback
1560	FDR, Flight Data Recorder,Franklin Delano Roosevelt
1561	Fe, Iron (Latin Ferrum)
1562	FE, Fully Exposed (armoured vehicle target, as opposed to Hull-Down)
1563	FEAR, First Encounter Assault Recon,False Evidence Appears Real
1564	FEAST,(a/i) Forum for European-Australian Science and Technology Cooperation
1565	FEATS, Festival of European Anglophone Theatrical Societies link title
1566	FEBA, Forward Edge of the Battle Area
1567	FED,(a/i) Field emission display
1568	FEDEP, Federation Development Process (Simulation)
1569	FEF, Frontal Eye Field (neurophysiology)
1570	FEMA-(a/i) Farm Equipment Manufacturers Association,(a/i) U.S. Federal Emergency Management Agency,Fire Equipment Manufacturers' Association
1571	FENS,(a/i) Federation of European Neuroscience Societies
1572	FEP, Firepower Enhancement Program,Fleet satellite (FLTSAT) Extremely high frequency (EHF) Package
1573	FES, Flywheel Energy Storage
1574	FEST, Frankfurt English Speaking Theatre link title
1575	FET, Field-effect transistor
1576	FEZ,(a/i) Fighter Engagement Zone
1577	ff, Fula language (ISO 639-1 code)
1578	fF, Femtofarad
1579	FF- Final Fantasy, Firefox (Web browser)
1580	FFA- Football Federation Australia,Pacific Islands Forum Fisheries Agency,Free-Fire Area,Fusiform Face Area,Future Farmers of America (today the National FFA Organization)
1581	FFB, Frum From Birth (referring to an observant Jew born into a religiously observant family)
1582	FFC, Free For Chat
1583	FFE, Fukuoka Futures Exchange
1584	FFG, Guided Missile Frigate (hull classification symbol)
1585	FFOV, Forward Field Of View
1586	FFS, For Fuck's Sake
1587	FFT- Fast Fourier Transform,Final Fantasy Tactics,FG[edit]
1588	FG, Falun Gong
1589	fg, Femtogram
1590	FG, Fog (METAR Code),French Guiana (FIPS 10-4 territory code)
1591	FGR, Flickr Group Roulette
1592	fH, Femtohenry
1593	FHFIF, Foster's Home for Imaginary Friends
1594	FHI, Family Health International, Fuji Heavy Industries, Ltd.
1595	fi, Finnish language (ISO 639-1 code)
1596	FI, Finland (ISO 3166 digram; FIPS 10-4 country code)
1597	FIB, Fucking Illinois Bastard (Wisconsin slang, variants exist)
1598	FIBUA,(i/a) Fighting In Built-Up Areas
1599	FIC, Fellowship for Intentional Community
1600	FID, Foreign Internal Defence
1601	FIE, Fly-In Echelon
1602	FIFO, First In, First Out
1603	FIFRA, Federal Insecticide, Fungicide, and Rodenticide Act
1604	FIGJAM, Fuck I'm Good, Just Ask Me
1605	fij, Fijian language (ISO 639-2 code)
1606	FILO, First In, Last Out (see also LIFO)
1607	FIMPT, Fellow of the Institute of Maxillofacial Prosthetists and Technologists
1608	fin, Finnish language (ISO 639-2 code)
1609	FIN, Finland (ISO 3166 trigram)
1610	FIPS, Federal Information Processing Standard
1611	FIRES,Fever Induced Refractory Epilepsy Syndrome or Febrile Infection-Related Epilepsy Syndrome
1612	FISH, Fluorescence In-Situ Hybridisation
1613	FiST, Fire Support Team
1614	FITS, Flexible Image Transport System
1615	FIU, Florida International University
1616	fj, Fijian language (ISO 639-1 code)
1617	fJ, Femtojoule
1618	FJ, Fiji (ISO 3166 digram; FIPS 10-4 country code)
1619	FJD, Fiji dollar (ISO 4217 currency code)
1620	FJI, Fiji (ISO 3166 trigram)
1621	FJN, Financial Job Network
1622	fK, Femtokelvin
1623	FK, Falkland Islands (ISO 3166 digram; FIPS 10-4 territory code)
1624	FKP, Falkland Islands pound (ISO 4217 currency code)
1625	FKSM, Fort Knox Supplemental Manual
1626	FKT, Fastest Known Time
1627	fL, Femtolitre
1628	FL, Florida (postal symbol)
1629	FLA, Florida, Front Line Assembly,Future Large Aircraft
1630	FLAB, Four-letter abbreviation
1631	FLAC,(a/i) Free Lossless Audio Codec
1632	FLAC,(a/i) Free Legal Advice Centres
1633	FLB, Forward Logistics Base
1634	FLET,(a/i) Forward Line of Enemy Troops
1635	FLG, Falun Gong
1636	FLIP, Flight Information Publication
1637	FLIR, Forward Looking InfraRed (sensor)
1638	FLK, Falkland Islands (ISO 3166 trigram)
1639	FLOT,(a/i) Forward Line of Own Troops
1640	FLSA, Fair Labor Standards Act
1641	FLQ, Free Legal Questions
1642	FLTSAT, Fleet Satellite
1643	FLTSATCOM, Fleet Satellite Communication System
1644	FLUBOS, Fat, Lazy, Useless, Bag Of Shit
1645	FM, Factory Mutual http://fmglobal.com
1646	fm, Femtometre
1647	Fm, Fermium
1648	FM- Federal Magistrate (Australian post-nominal), Federated States of Micronesia (postal symbol; ISO 3166 digram; FIPS 10-4 territory code), Field Manual,Flight Manager,Frequency Modulation (electronics)
1649	FMC- Federal Magistrates' Court (an Australian federal court, formerly FMS),Food Machinery Corporation (original name of the company now known as FMC Corporation)
1650	FMCA, Federal Magistrates' Court of Australia (used for citing decisions of the FMC other than family law decisions)
1651	FMCAfam, Federal Magistrates' Court of Australia: family (used for citing family law decisions of the FMC)
1652	FME, Formal Methods Europe
1653	FMECA, Failure Modes and Effect Criticality Analysis
1654	FMJD, Fédération Mondiale du Jeu de Dames[2]
1655	FMLA, Family Medical Leave Act
1656	fMRI, Functional Magnetic Resonance Imaging
1657	FMS- Federal Magistrates Service (an Australian federal court, now FMC), Flight Management System,Foreign Military Sales
1658	FMSF, False Memory Syndrome Foundation
1659	FMTV, Family of Medium Tactical Vehicles
1660	FMCG, (Fast Moving Consumer Goods)
1661	fN, Femtonewton
1662	FNA, Functional Needs Analysis
1663	fo, Faroese language (ISO 639-1 code)
1664	FO, Faroe Islands (ISO 3166 digram; FIPS 10-4 territory code), Force Operations (military),Forward Observer,Frame Optional (military symbology)
1665	FOAD, Fuck Off And Die
1666	FOAF, Friend Of A friend
1667	FoB, Free On Board (shipping)
1668	FOB,(i/a) Forward Operating Base
1669	FOC, Full Operational Capability,First of Class
1670	FoE, Friends of the Earth
1671	FOGC, Federal Oil and Gas Council
1672	FOH, Front Of House
1673	FOIA, Freedom of Information Act
1674	FOM, Federation Object Model
1675	FONSI, Finding of No Significant Impact
1676	FOO, Forward Observation Officer
1677	FOR, Field Of Regard,Frame Of Reference
1678	Fortran, The IBM Mathematical FORmula TRANslating System (programming language)
1679	FOS, Florida Ornithological Society,Full Operational Status
1680	FoS, Family of Systems
1681	FOSE, Fallout 3 Script Extender
1682	FOSE, Federal Office Systems Expo
1683	FOT, Free on truck
1684	FOTA, Fellow of the Orthodontic Technicians Association
1685	FOTC,Flight of the Conchords
1686	FOUO, For Official Use Only
1687	FOV, Field Of View
1688	FP, French Polynesia (FIPS 10-4 territory code)
1689	fps, frames per second (motion pictures, television, computer graphics)
1690	FPS- Fire Prevention System,First Person Shooter (computer/video games)
1691	FOOP, Friends Of Organ Pipes (Volunteer group)
1692	FQ, Baker Island (FIPS 10-4 territory code),French Southern and Antarctic Territories (ISO 3166 digram; obsolete 1979)
1693	FQDN, Fully Qualified Domain Name
1694	fr, French language (ISO 639-1 code)
1695	Fr, Francium
1696	FR, France (FIPS 10-4 country code; ISO 3166 digram)
1697	fra, French language (ISO 639-2 code)
1698	FRA- Federal Railroad Administration, France (ISO 3166 trigram)
1699	FRAGO, Fragmentary Order (military)
1700	FRAND, Fair, reasonable, and non-discriminatory (concept in standards-setting and intellectual property law)
1701	FRCP- Federal Rules of Civil Procedure,Fellow of the Royal College of Physicians
1702	FRICBM, Full Range ICBM
1703	frr, North Frisian language (ISO 639-2 code)
1704	FRO, Faroe Islands (ISO 3166 trigram)
1705	FRS- Fellow of the Royal Society,U.S. Federal Reserve System
1706	FRSA, Fellow of the Royal Society of Art
1707	fry, West Frisian language (ISO 639-2 code)
1708	FRY, Federal Republic of Yugoslavia
1709	fs, Femtosecond
1710	fS, Femtosiemens
1711	FS- Fire Support (military), French Southern and Antarctic Territories (FIPS 10-4 territory code)
1712	FSA- Fire Support Area,UK Food Standards Agency,Functional Solution Analysis
1713	FSC- Federal Supply Classification, Forest Stewardship Council (ecological pressure group
1714	FSCL, Fire Support Co-ordination Line
1715	FSE, Fire Support Element
1716	FSF, Free Software Foundation
1717	FSH, Follicle Stimulating Hormone
1718	FSI, Fuel Stratified Injection
1719	FSM- Federated States of Micronesia (ISO 3166 trigram), Flying Spaghetti Monster (satirical religion)
1720	FSO- Fire Support Officer,Flotilla Staff Officer,Foreign Service Officer
1721	FSS, Fire Support Station
1722	FSSP, Families of Structurally Similar Proteins
1723	FST- Finance Support Team,Finlands Svenska Television (Finland's Swedish-language television),Future Soviet Tank (Cold War era)
1724	FSTC, Foreign Science Technology Center (now NGIC)
1725	fT, Femtotesla
1726	FTC, Federal Trade Commission
1727	FTE, Full Time Equivalent
1728	FTL, Faster Than Light
1729	FTP, File Transfer Protocol
1730	FTW, For The Win (a commonly used phrase used online to indicate success) F@#K The World, Forever Together Where ever (gang slogan)
1731	FTS, Flight Termination System used during some rocket launches
1732	FTS, Fuck That Shit
1733	FU, Smoke (METAR Code)
1734	FUBAR, Fucked/Fouled Up Beyond All Recognition/Repair
1735	FUCK, For, Unlawful, Carnal, Knowledge (Van Halen album title)
1736	FUD, Fear, Uncertainty & Doubt (marketing strategy)
1737	ful, Fula language (ISO 639-2 code)
1738	fV, Femtovolt
1739	fW, Femtowatt
1740	FW, Forward
1741	FWC, Football World Cup
1742	FWF, Fixed Word Format
1743	FWI, French West Indies
1744	FWIW, For What It's Worth
1745	FWS, U.S. Fish and Wildlife Service
1746	FWT, Fresh Water Tank
1747	FX, Firefox,Fox Extended, Metropolitan France (ISO 3166 digram; obsolete 1997),Special effect
1748	FXX, Metropolitan France (ISO 3166 trigram; obsolete 1997)
1749	fy, West Frisian language (ISO 639-1 code)
1750	FY, Fiscal Year, Former Yugoslav Republic of Macedonia (NATO country code)
1751	FYA, For Your Agenda
1752	FYDP, Five-Year Defense Plan (U.S.)
1753	FYI, For Your Information
1754	FYROM, Former Yugoslav Republic of Macedonia
1755	FZDZ, Freezing Drizzle (METAR Code)
1756	FZFG, Freezing Fog (METAR Code)
1757	FZRA, Freezing Rain (METAR Code)
1758	g, Gram
1759	G, Gauss, General Audiences (movie rating)
1760	G1, Assistant Chief-of-Staff, Personnel
1761	G2, Assistant Chief-of-Staff, Intelligence
1762	G3,many, including Heckler & Koch G3; see entry, Assistant Chief-of-Staff, Operations and Plans
1763	G4, Generation Four PowerPC microprocessor, Assistant Chief-of-Staff, Logistics
1764	G5, Generation Five PowerPC microprocessor, Assistant Chief-of-Staff, Public Affairs
1765	G6, Assistant Chief-of-Staff, Information Technology, Group of 6 (France, Germany, United States, Japan, United Kingdom, Italy) (1975)
1766	G7, Assistant Chief-of-Staff, Training, Group of 7 (G6 + Canada) (1976)
1767	G8, Assistant Chief-of-Staff, Finance, Group of 8 (G7 + Russia) (1998)
1768	G9, Assistant Chief-of-Staff, Civil-Military Co-operation (CIMIC)
1769	G10, Group of 10 (G7 + Belgium, Netherlands, Sweden, Switzerland; numbering 11 in fact)
1770	G15, Group of 15 (subset of G77, formed 1989: Algeria, Argentina, Brazil, Chile, Egypt, India, Indonesia, Jamaica, Kenya, Nigeria, Malaysia, Mexico, Peru, Senegal, Sri Lanka, Venezuela and Zimbabwe; currently numbers 17)
1771	G20, Group of 20 (G8 + Argentina, Australia, Brazil, China, India, Indonesia, Mexico, Saudi Arabia, South Africa, South Korea, Turkey + current European Union presiding country) (1999)
1772	G24, Group of 24 (subset of G77, formed 1971: Algeria, Argentina, Brazil, Colombia, Côte d'Ivoire, Democratic Republic of the Congo, Egypt, Ethiopia, Gabon, Ghana, Guatemala, India, Iran, Lebanon, Mexico, Nigeria, Pakistan, Peru, Philippines, South Africa, Syria, Sri Lanka, Trinidad and Tobago and Venezuela)
1773	G77, Group of 77 (issued from the United Nations Conference on Commerce and Development, 1964; currently numbers 133)
1774	Ga, Gallium,Gigaannum
1775	GA, Gabon (ISO 3166 digram),The Gambia (FIPS 10-4 country code), Gamblers Anonymous,Georgia (postal symbol),Gigaampere,Goa (Indian state code)
1776	GAAR, General Anti-Avoidance Rule (tax evasion)
1777	GAB, Gabon (ISO 3166 trigram)
1778	GABA, Gamma-AminoButyric Acid
1779	GAD, Generalized Anxiety Disorder
1780	GAF, Garfield and Friends
1781	GALCIT, Guggenheim Aeronautical Laboratory, California Institute of Technology
1782	GAO, U.S. Government Accountability Office
1783	GAW, Global Atmospheric Watch
1784	GB, Gabon (FIPS 10-4 country code),United Kingdom of Great Britain and Northern Ireland (ISO 3166 digram) [glamour boy 7-9/10]
1785	GBBC, Great (Global) Backyard Bird Count
1786	GBE, Knight/Dame Grand Cross of the Order of the British Empire
1787	GBH- Great Bash Heel (Japanese professional wrestling stable),Gregory Bonner Hale (British design and advertising agency),Grievous bodily harm
1788	GBP, United Kingdom pound sterling (ISO 4217 currency code)
1789	GBR, United Kingdom of Great Britain and Northern Ireland (ISO 3166 trigram)
1790	GBU, Glide-Bomb Unit,Global Business Unit
1791	GC- East Germany (NATO country code; obsolete 1990), General classification (cycling),General counsel,George Cross (British civil decoration), Gigacoulomb [Grindr cruise]
1792	GCA, Graduate in Claims Administration
1793	GCD,see entry
1794	GCF, Greatest Common Factor
1795	GCI, Ground-controlled interception
1796	GCN, Gamma-ray burst Coordination Network
1797	GCS, Global Coordinate System
1798	GCSE, General Certificate of Secondary Education (UK)
1799	gd, Scottish Gaelic language (ISO 639-1 code)
1800	Gd, Gadolinium
1801	GD, Grenada (ISO 3166 digram)
1802	GDC, Game Developers Conference,General Dental Council
1803	GDL, Game Definition Language
1804	GDP, General Dental Practitioner (UK),Gross Domestic Product
1805	GDR, German Democratic Republic (cf. DDR)
1806	GDR, General Distribution Release (Microsoft Term for a software service release; between Hotfix and Service Pack)
1807	GDW, Game Designers Workshop
1808	Ge, Germanium
1809	GE, General Electric,Genetic Engineering (cf. GM), Georgia (ISO 3166 digram)
1810	GEBCO, General Bathymetric Chart of the Oceans
1811	GEC, Great Engineering Challenge
1812	GED, General Educational Development (high school equivalency credential in the U.S. and Canada)
1813	GEEP, Geophysical Equipment Exploration Platform
1814	GEL, Georgian lari (ISO 4217 currency code),Gilbert and Ellice Islands (ISO 3166 trigram; obsolete 1977)
1815	GEMA, Gas and Electricity Markets Authority,Georgia Emergency Management Agency, Gesellschaft für musikalische Aufführungs- und mechanische Vervielfältigungsrechte (German performance rights organisation), Global Engine Manufacturing Alliance
1816	GEN, Full General (four stars) in the U.S. Army
1817	GEO, Geostationary Earth Orbit, Georgia (ISO 3166 trigram)
1818	GEOS, Graphical Environment Operating System
1819	GEQ, Equatorial Guinea (IOC trigram, but not FIFA or ISO 3166)
1820	GER, Germany (IOC and FIFA trigram, but not ISO 3166)
1821	GeV, Gigaelectron-volt
1822	GEV, Ground Effect Vehicle
1823	GF- French Guiana (ISO 3166 digram),Gigafarad
1824	GFCF- Gluten-free, casein-free diet,Gross fixed capital formation
1825	GFCI, Ground Fault Circuit Interruptor (aka GFI)
1826	GFDL, GNU Free Documentation License
1827	GFE- Girlfriend experience (used in escort services),Good Faith Estimate,Government Furnished Equipment
1828	GFI, Ground Fault Interruptor (aka GFCI)
1829	GFL, German Football League (Germany's Bundesliga for American football; the English-language name is used in German without translation)
1830	GFN, Global Footprint Network
1831	GG, Georgia (FIPS 10-4 country code)
1832	GGK,Good God Karma
1833	GGP- General Game Playing,General Growth Properties (U.S. shopping center owner),GH[edit]
1834	GH, Ghana (ISO 3166 digram; FIPS 10-4 country code),Gigahenry
1835	GHA, Ghana (ISO 3166 trigram)
1836	GHB, gamma-Hydroxybutyric acid
1837	GHC, Ghanan cedi (ISO 4217 currency code)
1838	Gi, Gibi
1839	GI, Galvanised Iron,Gastro-Intestinal,General Issue, Gibraltar (ISO 3166 digram; FIPS 10-4 territory code), Government Issue
1840	GIB, Gibraltar (ISO 3166 trigram)
1841	GIF, Graphics Interchange Format
1842	GIG, Global Information Grid
1843	GIGO, Garbage In Garbage Out (computing)
1844	GIMP, GNU Image Manipulation Program
1845	GIN, Guinea (ISO 3166 trigram), Guidelines International Network
1846	GINK,Going Insane Not Knowing,orig. Colorado 2010 M.Kalfas
1847	GINO, Godzilla In Name Only
1848	GIP, Gibraltar pound (ISO 4217 currency code)
1849	GIS, Geographic Information System, Google Image Search
1850	GISS,(a/i) General Impression of Size and Shape,Goddard Institute for Space Studies
1851	GJ, Gigajoule,Grenada (FIPS 10-4 country code),Gujarat (Indian state code)
1852	GJD, Geocentric Julian Day
1853	GK, Gigakelvin,Guernsey (FIPS 10-4 territory code)
1854	gl, Galician language (ISO 639-1 code)
1855	GL- Gigalitre, Graphics Language, Greenland (ISO 3166 digram; FIPS 10-4 territory code), Grenade Launcher
1856	gla, Scottish Gaelic language (ISO 639-2 code)
1857	GLAAD, Gay and Lesbian Alliance Against Defamation
1858	GLAC, General Ledger Accounting Code
1859	GLAST, Gamma-ray Large Area Space Telescope
1860	GLBA, Gramm-Leach-Bliley Act
1861	GLC, Gas-liquid chromatography
1862	gle, Irish language (ISO 639-2 code)
1863	glg, Galician language (ISO 639-2 code)
1864	GLINT- Gallium-arsenide Laser Illuminator for Night TV,Gated Laser Illuminator for Narrow Television, Gated Laser Intensifier (tape),Gospel Literature International,Graphical Linux Installation Tool
1865	GLP, Guadeloupe (ISO 3166 trigram)
1866	GLUT,(a/i) OpenGL Utility Toolkit
1867	glv, Manx language (ISO 639-2 code)
1868	GLV, Gained Life Value
1869	Gm, Gigametre
1870	GM- The Gambia (ISO 3166 digram), GameMaster (role-playing),General Motors,Genetically Modified, Germany (FIPS 10-4 country code), Guru Meditation (computing)
1871	GMAC- General Motors Acceptance Corporation, the original name of the company now known as Ally Financial,Graduate Management Admission Council,G-MAC, Great Midwest Athletic Conference
1872	GMB- The Gambia (ISO 3166 trigram), General, Municipal, Boilermakers (and Allied Trade Union)
1873	GMC- U.K. General Medical Council,Gospel Music Channel
1874	GMD, Gambian dalasi (ISO 4217 currency code)
1875	GMFSC, Ground Mobile Forces Satellite Communications
1876	GMI- Generic Model Interface,Geometry Model Instance
1877	GML-Generalized Markup Language,Geography Markup Language,Game Maker Language,Graph Modelling Language,Graphical Motion Language,GUI Markup Language
1878	GMO, Genetically Modified Organism
1879	GMPCS, Global Mobile Personal Communications by Satellite
1880	GMT- Giant Magellan Telescope,Greenwich Mean Time,GN[edit]
1881	gn, Guaraní language (ISO 639-1 code)
1882	GN- Giganewton,Guinea (ISO 3166 digram)
1883	GNAS, Grand National Archery Society
1884	GNB, Guinea-Bissau (ISO 3166 trigram)
1885	GNF, Guinean franc (ISO 4217 currency code)
1886	GNOME, GNU Network Object Model Environment
1887	GNP, Gross National Product
1888	GNQ, Equatorial Guinea (ISO 3166 trigram)
1889	GnRH, Gonadotropin-Releasing Hormone
1890	GNU, GNU's Not Unix
1891	GO, Glorioso Islands (FIPS 10-4 territory code)
1892	GOA- General of the Army (United States only), Gun Owners of America
1893	GOAT, Greatest of all time (LL Cool J album title)
1894	GOC, General Officer Commanding
1895	GOES, Geostationary Operational Environmental Satellite
1896	GOP, Grand Old Party
1897	gorp, granola, oats, raisins, peanuts (another name for trail mix), probably a backronym
1898	GOSC,(a/i) General Officer Steering Committee
1899	GOSH, Great Ormond Street Hospital
1900	GOSP, Gas/Oil Separation Plant
1901	GOTS, Government off-the-shelf
1902	GOYADIN, Get Off Your Arse, Do It Now (anti-procrastination mantra)
1903	GP, General Practitioner,General Purpose,Grand Prix, Guadeloupe (ISO 3166 digram; FIPS 10-4 territory code)
1904	GPA, Grade Point Average
1905	GPC, Global Path Cache
1906	GPG, GNU Privacy Guard
1907	GPIB, General-Purpose Instrumentation/Interface Bus
1908	GPL, GNU General Public License
1909	GPMP, General Purpose Macro Processor
1910	GPO, General Post Office
1911	GPPC, Genetics and Public Policy Center
1912	GPR, Ground-Penetrating Radar
1913	GPS, General Problem Solver,Global Positioning System
1914	GPT, GEC-Plessey Telecommunications,General Purpose Technology,Get Paid To website
1915	GQ- Equatorial Guinea (ISO 3166 digram), Gentlemen's Quarterly (the original name of the magazine now known simply as GQ), Guam (FIPS 10-4 territory code),GR[edit]
1916	GR, Greece (FIPS 10-4 country code; ISO 3166 digram),Hail (METAR Code)
1917	GRAIL, Gravity Recovery and Interior Laboratory
1918	GRAS, Generally recognized as safe (FDA list)
1919	GRB, Gamma-Ray Burst
1920	GRC, Greece (ISO 3166 trigram)
1921	GRD, Grenada (ISO 3166 trigram)
1922	GRE- Graduate Record Examination, Greece (IOC and FIFA trigram, but not ISO 3166)
1923	grep, [search] Globally for Regular Expression, Print [lines]
1924	GRid,Global Release Identifier, a music industry identifier from the RIAA and IFPI
1925	GRID, Gay-Related Immune Deficiency (original name of AIDS)
1926	GriT, Girl raised in Texas (Woman presenting firm southern traits/beliefs)
1927	GRL, Greenland (ISO 3166 trigram)
1928	GRN- Grenada (IOC and FIFA trigram, but not ISO 3166), Goods Received Note
1929	grn, Guaraní language (ISO 639-2 code)
1930	GRP, Graphite-reinforced plastic, see Carbon-fiber-reinforced polymer
1931	Gs, Gigasecond
1932	GS- General Schedule (US civil service pay scale),General Support, Gigasiemens,South Georgia and the South Sandwich Islands (ISO 3166 digram)
1933	GSR, Gun Shot Residue
1934	GSA, U.S. General Services Administration
1935	GSD, Graphical Situation Display
1936	GSGB,(God send glamour boy 9-10/10)
1937	GSK, GlaxoSmithKline [good sexual karma]
1938	GSN,(a/i) Game Show Network
1939	GSO, General Services Officer (U.S. Department of State)
1940	GSOH, Good Sense Of Humour
1941	GSP,Georges St-Pierre (Canadian MMA fighter)
1942	GSS, Generic Security Services
1943	GST, Goods and Services Tax (Australia, Canada, and other countries)
1944	GSW, Gunshot wound
1945	GT, Gigatesla, Gran Turismo,Grand Touring, Guatemala (FIPS 10-4 country code; ISO 3166 digram)
1946	GTA, Grand Theft Auto
1947	GTB, Get to bed, namely to get a new job after a long time of searching, usually following a phone call
1948	GTC, Gran Telescopio Canarias (Spanish, Canaries Great Telescope)
1949	GTD, Getting Things Done
1950	GTG, Got To Go (Internet chat)
1951	GTK, Good To Know (Internet chat)
1952	GTGN, Getty Thesaurus of Geographic Names
1953	GTM, Guatemala (ISO 3166 trigram)
1954	GTQ, Guatemalan quetzal (ISO 4217 currency code)
1955	GTV, Gross Tumor Volume quetzal (ISO 4217 currency code)
1956	gu, Gujarati language (ISO 639-1 code)
1957	GU, Guam (postal symbol; ISO 3166 digram)
1958	GUA, Guatemala (IOC and FIFA trigram, but not ISO 3166)
1959	GUF, French Guiana (ISO 3166 trigram)
1960	GUILT, Gangliated Utrophin Immuno Latency Toxin
1961	guj, Gujarati language (ISO 639-2 code)
1962	GULCR, Grupo de Usuarios de Linux de Costa Rica
1963	GUT, Grand Unification Theory
1964	gv, Manx language (ISO 639-1 code)
1965	GV, Gigavolt,Guinea (FIPS 10-4 country code)
1966	GW, Games Workshop,Germ Warfare, Gigawatt, Guided Weapon, Guinea-Bissau (ISO 3166 digram)
1967	GWARS, Ground Warfare System (simulation)
1968	GWAS, Grand Western Archery Society
1969	GWOT, Global War on Terrorism
1970	GWS, Gulf War Syndrome,Greater Western Sydney
1971	GXA, Global XML Web Services Architecture
1972	GXE, Gene-enivronment interaction
1973	GXF, General Exchange Format
1974	GXH, IATA code of Gannan Xiahe Airport
1975	GXL, Graph eXchange Language
1976	GXM, Matrox Graphics eXpansion Module
1977	GXP, Grid Exit Point, Global Xchange Programme, Indication of highest performance level on some Pontiac vehicles
1978	GxP, Good X Practice (X can mean: clinical, manufacturing, pharmaceutical, etc.)
1979	GXY, IATA code of Greeley-Weld County Airport
1980	GY, Guyana (FIPS 10-4 country code; ISO 3166 digram)
1981	GYD, Guyana dollar (ISO 4217 currency code)
1982	GYY, Gary/Chicago International Airport (IATA Airport Code)
1983	GZ, Gaza Strip (FIPS 10-4 territory code), Ground Zero
1984	GZK, Greisen-Zatsepin-Kuzmin cut-off (cosmic ray energies)
1985	h, Hecto
1986	H, Henry,Hydrogen
1987	ha, Hausa language (ISO 639-1 code),Hectare
1988	HA, Haiti (FIPS 10-4 country code), High Availability
1989	HAARP, High Frequency Active Auroral Research Program
1990	HAART, Highly Active Anti-Retroviral Therapy
1991	HAI, Human Awareness Institute
1992	HAL, Hardware Abstraction Layer
1993	HALO, High Altitude Low Opening (parachute jump)
1994	HALT- Highly Accelerated Life Test, Hungry Angry Lonely Tired
1995	HAM, Amateur radio operator
1996	HANS, Head And Neck Support (device used in many race cars)
1997	HARM, High-speed Anti-Radiation Missile
1998	hat, Haitian Creole language (ISO 639-2 code)
1999	HAT,(i/a) Highest Astronomical Tide (nautical charts), Hungarian Automated Telescope
2000	hau, Hausa language (ISO 639-2 code)
2001	HAW, Heavy Antitank Weapon
2002	HAWK, Homing All the Way Killer (air defence system)
2003	HAZ, Heat-Affected Zone
2004	HAZMAT, Hazardous Materials
2005	HBCD, HexaBromoCycloDodecane
2006	HBCI, Home Banking Computer Interface
2007	HBO, Home Box Office
2008	HBR, Harvard Business Review
2009	HBT, Heterojunction Bipolar Transistor
2010	HBV, Hepatitis B Virus
2011	HCCI, Homogeneous Charge Compression Ignition
2012	HCF, Highest Common Factor
2013	HCI, Human-Computer Interaction/Interface
2014	HCSC, Higher Command and Staff Course
2015	HCT, Higher Colleges of Technology, tertiary education institution in the United Arab Emirates (UAE)
2016	HD- Henry Draper (star catalogue),Hull-Down (armoured vehicle target, as opposed to Fully Exposed),High Definition,Huntington's Disease
2017	HDD- Hard Disk Drive,High-Density Disk
2018	HDL, High-Density Lipoprotein
2019	HDM, Human Decision-Making
2020	HDMI,High Definition Multimedia Interface
2021	HDR- Hard disk recorder,Henningson, Durham & Richardson (founders of the engineering and construction firm now known by their initials),High dynamic range, a term used in both digital imaging and 3D rendering,Hot Dry Rock (experimental geothermal technology),Human Development Report (UN publication)
2022	HDRA, Henry Doubleday Research Association
2023	HDTV, High-Definition Television
2024	he, Hebrew language (ISO 639-1 code)
2025	He, Helium
2026	HE, High Explosive
2027	HEAT, High Explosive Anti-Tank (ammunition)
2028	heb, Hebrew language (ISO 639-2 code)
2029	HEBA, Hellenic Basketball Clubs Association
2030	HEER, High-Explosive Extended Range (ammunition)
2031	HEIC, Honourable East India Company
2032	HEMP, High-Altitude Electromagnetic Pulse
2033	HEO- High Earth Orbit, Highly Elliptical Orbit
2034	HEOSS, High Earth Orbit Space Surveillance
2035	HEP, High-Explosive Plastic (ammunition)
2036	HEPA,(a/i) High-Efficiency Particulate Air (filter)
2037	her, Herero language (ISO 639-2 code)
2038	HESH, High-Explosive, Squash-Head (ammunition)
2039	HESV, Heavy Engineering Support Vehicle
2040	HETT, Heavy Equipment Transporting Truck / Heavy Equipment Truck Tractor
2041	HEU, Highly Enriched Uranium
2042	Hewitts, Hills in England, Wales and Ireland over Two Thousand feet (with topographic prominence of at least 30 m)
2043	Hf, Hafnium
2044	HF, High Frequency
2045	HFE, Human Fertilisation and Embryology (UK Act)
2046	HFE, The common-emitter current gain in a BJT transistor (also represented by βF). See: BJT
2047	HFEA, Human Fertilisation and Embryology Authority (UK)
2048	Hg, Mercury (Latin Hydrargyrum)
2049	HGC, UK Human Genetics Commission
2050	HGF, Human Growth Factor
2051	HGTV, Home & Garden Television
2052	HHB,Ha Ha Bonk,The noise made when you laugh your head off. Used instead of LOL...
2053	hi, Hindi language (ISO 639-1 code)
2054	HI, Hawaii (postal symbol)
2055	HIH, His (or Her) Imperial Highness
2056	HIM, His (or Her) Imperial Majesty
2057	HIMAD, High to Medium Altitude Air Defence (see also H/MAD)
2058	HIMEZ, High Altitude Missile Engagement Zone
2059	HIMYM,How I Met Your Mother
2060	hin, Hindi language (ISO 639-2 code)
2061	HIPAA, U.S. Health Insurance Portability and Accountability Act
2062	Hipparcos, HIgh Precision Parallax COllecting Satellite
2063	Hird, Hurd of interfaces representing depth (cf. HURD)
2064	HiRISE, High Resolution Imaging Science Experiment
2065	HIT, Health Information Technology
2066	HIV, Human Immunodeficiency Virus
2067	HIWT, Hobart Institute of Welding Technology
2068	HJD, Heliocentric Julian Day
2069	HK, Hong Kong (ISO 3166 digram; FIPS 10-4 territory code)
2070	HKD, Hong Kong dollar (ISO 4217 currency code)
2071	HKG, Hong Kong (ISO 3166 trigram)
2072	HKS, HyperKinetic Syndrome
2073	hL, Hectolitre
2074	HL, Holding Line
2075	HLA, High Level Architecture (simulation),Human Leukocyte Antigen
2076	HLL, High-Level Language
2077	HLN, Headline News
2078	HLOS, High Level Output Specification
2079	HLVW, Heavy Logistics Vehicle, Wheeled
2080	HM, Heard Island and McDonald Islands (ISO 3166 digram; FIPS 10-4 territory code)
2081	HMCE, Her/His Majesty's Customs and Excise (former UK government department; succeeded by HM Revenue and Customs)
2082	HMCS- Her/His Majesty's Canadian Ship,Her Majesty's Courts Service (former UK agency; succeeded by Her Majesty's Courts and Tribunals Service)
2083	HMD, Heard and McDonald Islands (ISO 3166 trigram)
2084	HMF, HydroxyMethyl Furfural
2085	HMM, Hidden Markov model
2086	hmo, Hiri Motu language (ISO 639-2 code)
2087	HMO, Health maintenance organization
2088	HMP, Her Majesty's Prison
2089	HMRC, Her/His Majesty's Revenue and Customs
2090	HMS- Helmet-mounted display,Her/His Majesty's Ship (Royal Navy)
2091	HMSO, Her Majesty's Stationery Office
2092	HMV, His Master's Voice
2093	HN, Honduras (ISO 3166 digram)
2094	HND, Honduras (ISO 3166 trigram)
2095	HNL, Honduran lempira (ISO 4217 currency code)
2096	ho, Hiri Motu language (ISO 639-1 code)
2097	Ho, Holmium
2098	HO, Honduras (FIPS 10-4 country code)
2099	HOLLAND, Hope Our Love Lasts And Never Dies
2100	HOMES,the Great Lakes; Huron, Ontario, Michigan, Erie, Superior
2101	HONY,Humans of New York, a photoblog.
2102	HOPI, Hybrid Optical and Packet Infrastructure (see Internet2, Abilene Network)
2103	HoReCa, Hotel, Restaurant and Catering
2104	HORIZON, Hélicoptère d'observation radar et d'investigation sur zone (French, Zone Investigation and Radar Observation Helicopter)
2105	HOSTAC, Helicopter Operations from Ships Other Than Aircraft Carriers
2106	HOT, Highly Optimised Tolerance
2107	HOTAS, Hands on throttle-and-stick
2108	HOV, High Occupancy Vehicle
2109	hp, horse power
2110	HP, Hewlett-Packard,Hindustan Petroleum, Himachal Pradesh (Indian state code)
2111	HPA, UK Health Protection Agency
2112	HPCL, Hindustan Petroleum Corporation Limited
2113	HPLC, High Performance Liquid Chromatography
2114	HPT, High[er] Payoff Target
2115	HPV, Human Papilloma Virus
2116	HQ, HeadQuarters, Howland Island (FIPS 10-4 territory code)
2117	HQDA, HeadQuarters, Department of the Army
2118	hr, Croatian language (ISO 639-1 code)
2119	HR- Croatia (FIPS 10-4 country code; ISO 3166 digram,from the country's native name of Hrvatska), Haryana (Indian state code), Harvard Revised star catalogue,Human Resources
2120	HRBL, High-level Representation of Behavior Language (original name of the Herbal language)
2121	HRD, Human Resource Development
2122	HRED, (U.S. Army Research Laboratory's) Human Research and Engineering Directorate (Aberdeen Proving Ground, Maryland)
2123	HRF, High iness Forces
2124	HRH, His (or Her) Royal Highness
2125	HRK, Croatian kuna (ISO 4217 currency code)
2126	HRM, His (or Her) Royal Majesty
2127	HRM, Human Resource Management
2128	HRT, Hormone Replacement Therapy
2129	hrv, Croatian language (ISO 639-2 code)
2130	HRV- Croatia (ISO 3166 trigram), High Resolution Visible,HS[edit]
2131	Hs, Hassium
2132	HSBC, The Hong Kong and Shanghai Banking Corporation
2133	HSC, Higher School Certificate
2134	HSM, High School Musical
2135	HSMAD, Human Science/Modeling and Analysis Data
2136	HSN, Home Shopping Network
2137	HSPH, Harvard School of Public Health
2138	HSS- Health Service Support, High-Speed Steel
2139	HSSI, High-Speed Serial Interface
2140	HST,see entry
2141	HSV- Herpes Simplex Virus,Hue Saturation Value (colour model),HT[edit]
2142	ht, Haitian Creole language (ISO 639-1 code)
2143	HTA, HyperText Application
2144	HTC-High Tech Computer Corporation, original name of the company now known simply as HTC,Horry Telephone Cooperative
2145	HTFU, Harden The Fuck Up
2146	HTG, Haitian gourde (ISO 4217 currency code)
2147	HTH, Hope That Helps
2148	HTI, Haiti (ISO 3166 trigram)
2149	HTML, HyperText Markup Language
2150	HTR, Heated Towel Rail
2151	HTS, High-Temperature Superconducting wire
2152	HTTP, HyperText Transfer Protocol
2153	HU, Hungary (ISO 3166 digram; FIPS 10-4 country code)
2154	HUD,(i/a) Head-Up Display,Housing and Urban Development
2155	HUF, Hungarian forint (ISO 4217 currency code)
2156	HUHA, Head up his/her ass (Marine salute; probably a backcronym)
2157	HUMINT, Human Intelligence (military parlance)
2158	hun, Hungarian language (ISO 639-2 code)
2159	HUN, Hungary (ISO 3166 trigram)
2160	HURD, Hird of Unix-Replacing Daemons (cf. Hird)
2161	HVU, High Value Unit (military)
2162	HV, Upper Volta (ISO 3166 digram; obsolete 1984)
2163	HVAC, Heating, ventilation and air conditioning Used in architecture, business and marketing; refers to a building's entire system of heating, moving, or cooling air.
2164	HVAP, High Velocity Armour Piercing (ammunition)
2165	HVHF,High velocity human factors
2166	HVM, High Velocity Missile
2167	HVO, Upper Volta (ISO 3166 trigram; obsolete 1984)
2168	HVP, HarborView Properties,High vacuum process,Hydrolyzed vegetable protein,Human Variome Project,High Velocity Protection,H.V.P. (rapper),High Voltage Protection,High Vapor Pressure,Hub Voice Processor,High-Velocity Projectile,High-Video Pass,High-Velocity Particle
2169	HW, Hardware, High Water (nautical charts)
2170	HWM, Hardware morphing (computer graphics rendering)
2171	HX, IATA code of Hong Kong Airlines, Medical history, Hydrogen halide, Concept automobile by HUMMER
2172	HXB, The glycoprotein Tenascian C
2173	hy, Armenian language (ISO 639-1 code)
2174	hye, Armenian language (ISO 639-2 code)
2175	HYS, Harvard, Yale, Stanford (perennially named as the top three law schools in the U.S.)
2176	hz, Herero language (ISO 639-1 code)
2177	Hz, Hertz
2178	HZ, Haze (METAR Code)
2179	I, Iodine,One (in Roman numerals)
2180	ia, Interlingua language (ISO 639-1 code)
2181	IA, Iowa (postal symbol)
2182	IAAL, I Am A Lawyer
2183	IAB, International Association for Biologicals
2184	IACREOT, International Association of Clerks, Recorders, Election Officials, and Treasurers
2185	IAD, Ion Assisted Deposition
2186	IADS, Integrated Air Defence System
2187	IAEA, International Atomic Energy Agency
2188	IAF,{i} Industrial Areas Foundation
2189	IAFG, Information Assurance Focus Group
2190	IAI, International African Institute,Israel Aircraft Industries
2191	IANA, Internet Assigned Numbers Authority
2192	IANAL, I Am Not A Lawyer
2193	IAQ, Indoor air quality,Infrequently Asked Questions
2194	IAS, Image Assessment System
2195	IASIP, It's Always Sunny in Philadelphia
2196	IATA,(a/i) International Air Transport Association
2197	IATF,International Automotive Task Force
2198	IATSE,International Alliance of Theatrical Stage Employees
2199	IAU, International Association of Universities,International Astronomical Union
2200	IAUC, International Astronomical Union Circular
2201	IAW, In Accordance With
2202	IB, International Baccalaureate
2203	IBA, Important Bird Area
2204	IBD, Inflammatory Bowel Disease
2205	IBDM, Information Based Decision Making
2206	IBDS, Integrated Biological Detection System,International Business Development Specialist
2207	IBM, International Business Machines
2208	ibo, Igbo language (ISO 639-2 code)
2209	IBRD, International Bank for Reconstruction and Development (part of the World Bank)
2210	IBS, Irritable Bowel Syndrome
2211	IC, Ice Crystals (METAR Code),Iceland (FIPS 10-4 country code), Integrated Circuit,[inner circle]
2212	ICANN, Internet Corporation for Assigned Names and Numbers
2213	ICAO, International Civil Aviation Organization
2214	ICBM, Intercontinental Ballistic Missile
2215	ICBN, International Code of Botanical Nomenclature
2216	ICC, Integrated Command and Control,International Criminal Court,International Cricket Council,Interstate Commerce Commission,International Chamber of Commerce
2217	ICD, Implantable Cardioverter-Defibrillator,Initial Capabilities Document,International Classification of Diseases
2218	ICE,(i/a) In case of emergency
2219	ICES,(a/i) International Council for the Exploration of the Sea
2220	ICF, Intelligent Community Forum
2221	ICM, Improved Conventional Munition,Integrated Collection Management,International Congress of Mathematicians,Iraq Campaign Medal
2222	ICMP, Internet Control Message Protocol
2223	ICNAF, International Commission for the Northwest Atlantic Fisheries (became NAFO in 1978)
2224	ICNI, Integrated Communication, Navigation, and Identification
2225	ICO, Intermediate Circular Orbit
2226	ICP, Inductively coupled plasma,Insane Clown Posse
2227	ICPE,(a/i) International Conference on Pharmacoepidemiology, the annual conference of the International Society for Pharmacoepidemiology
2228	ICRAF, International Centre for Research in Agroforestry (a.k.a. World Agroforestry Centre since 2002)
2229	ICRISAT,(i/a) International Crops Research Institute for the Semi-Arid Tropics
2230	ICRL, Individual Component Repair List
2231	ICRS, International Celestial Reference System
2232	ICS, In-Country Support,Intelligence and Communications Systems,Interim Contractor Support
2233	ICSI, Intracytoplasmic Sperm Injection
2234	ICT, Information and communication technologies
2235	ICTH, Island Closest to Heaven/Hell Final Fantasy VIII
2236	ICV, Infantry Carrier Vehicle
2237	ICW, In Co-ordination With,Indonesia Corruption Watch,Infectious and Chemotherapeutic Waste,Insulating Concrete Wall,Integral Crystalline Waterproofing, Interactive Courseware
2238	ICYMI, In Case You Missed It
2239	ICZN, International Code of Zoological Nomenclature,International Commission on Zoological Nomenclature
2240	id, Indonesian language (ISO 639-1 code)
2241	ID- Idaho (postal symbol), Identity, Indonesia (FIPS 10-4 country code; ISO 3166 digram), Infantry Division,Intelligent Design,ID10T Error, Idiot User Error (IT help desk inside joke)
2242	IDA- U.S. Institute for Defense Analyses,International Development Association (part of the World Bank
2243	IDC, International Data Corporation
2244	IDDI, I don't do initialisms (see irony)
2245	IDE- Integrated Development Environment,Integrated Drive Electronics
2246	IDeA, Improvement and Development Agency, the former name of Local Government Improvement and Development in the United Kingdom
2247	IDEA- Individuals with Disabilities Education Act (U.S.),International Data Encryption Algorithm,International Design Excellence Awards
2248	IDF- Israel Defense Forces,Intel Development Forum,International Dairy Federation
2249	IDGAF, I don't give a fuck
2250	IDK, I don't know
2251	IDKIBTI,I don't know, I'm black, that's it
2252	IDL, Interface Definition Language
2253	IDN, Indonesia (ISO 3166 trigram)
2254	ido, Ido language (ISO 639-2 code)
2255	IDR, Indonesian rupiah (ISO 4217 currency code)
2256	ie, Interlingue language (ISO 639-1 code)
2257	IE, Indo-European languages,Internet Explorer, Ireland (ISO 3166 digram),Iced Earth
2258	IEA, International Energy Agency
2259	IEC, International Electrotechnical Commission
2260	IED, Improvised Explosive Device
2261	IELTS, International English Language Testing System
2262	IER, Information Exchange Requirement
2263	IET, Institution of Engineering and Technology
2264	IET,(ii) Initial Entry Training
2265	IETF, Internet Engineering Task Force
2266	IEW, Intelligence and Electronic Warfare
2267	IFAB, International Football Association Board
2268	IFAH, International Federation for Animal Health
2269	IFAP, International Federation of Agricultural Producers
2270	IFC, International Finance Corporation (part of the World Bank), Independent Film Channel
2271	IFF, Identification, Friend or Foe,Individually Fresh Frozen,International Flavors and Fragrances
2272	IFFN, Identification, Friend, Foe, or Neutral
2273	IFO, Identified Flying Object (see also UFO)
2274	IFOR, UN Implementation Force, Institute for Operations Research,International Fellowship of Reconciliation
2275	IFOV, Instantaneous Field of View
2276	IFPI, International Federation of Phonographic Industries
2277	IFR, Instrument Flight Rules
2278	IFRB, International Frequency Registration Board
2279	IFV, Infantry Fighting Vehicle
2280	ig, Igbo language (ISO 639-1 code)
2281	IG, Inspector General
2282	IGNOU, Indira Gandhi National Open University
2283	IGS, International Ground Station
2284	IGY, Israeli Gay Youth,International Geophysical Year
2285	IHH, Idiopathic Hypogonadotropic Hypogonadism
2286	IHO,(i/a) International Hydrographic Organization
2287	IHR, Institute for Historical Review
2288	IHSI,Institutum Historicum Societatis Iesu (Jesuit Historical Institute)
2289	ii, Sichuan Yi language (ISO 639-1 code)
2290	II, Two (in Roman numerals)
2291	IICA, Inter-American Institute for Cooperation on Agriculture
2292	IIE, Innovative Interstellar Explorer
2293	iii, Sichuan Yi language (ISO 639-2 code)
2294	III, Three (in Roman numerals)
2295	IIRC, If I Recall/Remember Correctly
2296	IISS, International Institute for Strategic Studies
2297	IIT, Illinois Institute of Technology,Indian Institutes of Technology,Indiana Institute of Technology
2298	IJN, Imperial Japanese Navy (World War II)
2299	IJWP, Interim Joint Warfare Publication
2300	ik, Inupiaq language (ISO 639-1 code)
2301	IKEA, Ingvar Kamprad (the company's founder), Elmtaryd (the farm where he was born and raised), Agunnaryd (a village and parish near the farm)
2302	iku, Inuktitut language (ISO 639-2 code)
2303	IL, Illinois (postal symbol),Israel (ISO 3166 digram)
2304	ILC, International Law Commission,International Linear Collider
2305	ILDS, Improved Landmine Detection System
2306	ile, Interlingue language (ISO 639-2 code)
2307	ILO, International Labour Organization
2308	ILRI, International Livestock Research Institute
2309	ILS, Israeli shekel (ISO 4217 currency code)
2310	ILY, IATA code for Islay Airport (Scotland), I Love You [pronounced ILL-LEE]
2311	IM- Isle of Man (FIPS 10-4 territory code), Instant Message (internet speech)
2312	IMA- Intermediate Maintenance Activity,Institute of Mathematics and Applications
2313	IMBD, International Migratory Bird Day
2314	IMDb,Internet Movie Database
2315	IME, In My Experience
2316	IMF- id music file/id's music format (audio file format),Impossible Missions Force, the protagonist organization in the Mission: Impossible media franchise,International Monetary Fund (the most common use for the initialism)
2317	IMHO, In My Humble/Honest Opinion, cf. IMO
2318	IML, International Mister Leather
2319	IMLAST, International Movement for Leisure Activities in Science and Technology,see MILSET
2320	IMNM,,Immune-mediated necrotizing myopathy a rare, but serious ADR of statins [1]
2321	IMNSHO, In My Not So Humble Opinion
2322	IMPAC, International Merchant Purchase Authorization Card
2323	IMPACT, International Medical Products Anti-Counterfeiting Taskforce
2324	IMPATT, IMPact Avalanche Transit Time diode
2325	IMPT, Institute of Maxillofacial Prosthetists and Technologists
2326	IMRO-Internal Macedonian Revolutionary Organization,Irish Music Rights Organisation
2327	IMRL, Individual Material iness List
2328	IMS- Information Management System,International Meat Secretariat,Ion Mobility Spectrometer
2329	IMSA- Illinois Mathematics and Science Academy,International Mind Sports Association,International Motor Sports Association
2330	IMsL, International Ms. Leather
2331	IMT, Integrated Management Tool
2332	IMU, International Mathematical Union
2333	In, Indium
2334	IN, India (FIPS 10-4 country code; ISO 3166 digram),Indiana (postal symbol),Infantry
2335	ina, Interlingua language (ISO 639-2 code)
2336	INA, Immigration and Nationality Act
2337	INAS, International Near-Earth Asteroid Survey
2338	INCITS, InterNational Committee for Information Technology Standards
2339	ind, Indonesian language (ISO 639-2 code)
2340	IND, India (ISO 3166 trigram)
2341	inet, the Internet
2342	INDIGO, (U.S.) INtelligence DIvision Gaming Operation
2343	INFORMS, (U.S.) Institute for Operations Research and the Management Sciences
2344	INFOSEC, Information Security
2345	INLA, Irish National Liberation Army
2346	INMARSAT, International Maritime Satellite organization
2347	INR, Indian rupee (ISO 4217 currency code)
2348	INRIA, Institut national de recherche en informatique et en automatique
2349	INS, Immigration and Naturalization Service
2350	InSAR, Interferometric synthetic aperture radar
2351	INST, Information Standards and Technology
2352	INTSUM, Intelligence Summary
2353	INTERFET, International Force for East Timor
2354	io, Ido language (ISO 639-1 code)
2355	IO, British Indian Ocean Territory (ISO 3166 digram; FIPS 10-4 territory code)
2356	IOC- Initial Operational Capability,Intergovernmental Oceanic Commission,International Olympic Committee,International Ornithological Congress
2357	IOLTA, Interest on Lawyer Trust Accounts (charitable funding mechanism, especially for legal aid)
2358	IOM- Iowa, Ohio, Michigan (soybean origin),Institute of Medicine,International Organisation for Migration,Isle of Man
2359	IONA, Islands of the North Atlantic (alternate name for Great Britain, Ireland, the Isle of Man, and related islands)
2360	IOT, British Indian Ocean Territory (ISO 3166 trigram)
2361	IP, Clipperton Island (FIPS 10-4 territory code), Initial Point,Intellectual Property,Internet Protocol
2362	IPA, India Pale Ale,International Phonetic Alphabet,Isopropyl alcohol
2363	IPB, Intelligence Preparation of the Battlefield
2364	IPCC, Intergovernmental Panel on Climate Change,Independent Police Complaints Commission
2365	ipk, Inupiaq language (ISO 639-2 code)
2366	IPL, Inferior Parietal Lobule
2367	IPO, Initial Public Offering
2368	IPR, In Progress Review,Intellectual Property Rights,Intelligence Production Requirement
2369	IPT, Integrated Product/Project Team
2370	IPTS, Institute for Prospective Technological Studies
2371	IPTV, Internet Protocol TeleVision
2372	IPW, Interrogation of Prisoners of War
2373	IQ, Intelligence Quotient, Iraq (ISO 3166 digram)
2374	IQD, Iraqi dinar (ISO 4217 currency code)
2375	Ir, Iridium
2376	IR, Infrared,Intelligence requirement (military), Iran (FIPS 10-4 country code; ISO 3166 digram),Iran Air (IATA alpha code) see entry for more
2377	IRA, Individual Retirement Account,Irish Republican Army (see also List of organisations known as the Irish Republican Army for groups claiming descent from this organisation)
2378	IRAD, Internal Research and Development
2379	IRAN,(I) Inspect and Repair As Necessary
2380	IRAS, Infrared Astronomical Satellite
2381	IRB, International Rugby Board
2382	IRBM, Intermediate Range Ballistic Missile
2383	IRC, International Red Cross,International Reply Coupon,Internet Relay Chat
2384	IREA, Intermountain Rural Electric Association
2385	IRL, Ireland (ISO 3166 trigram),Industrial Research Limited,Indy Racing League,In real life
2386	IRN, Iran (ISO 3166 trigram)
2387	IRINN,Islamic Republic of Iran News Network
2388	IRO, International Refugee Organisation
2389	IRQ, Iraq (ISO 3166 trigram)
2390	IRR, Iranian rial (ISO 4217 currency code)
2391	IRS, U.S. Internal Revenue Service
2392	IRST, Infra-red Search and Track
2393	is, Icelandic language (ISO 639-1 code)
2394	IS- Iceland (ISO 3166 digram),Israel (FIPS 10-4 country code)
2395	ISA- Individual Savings Account,Industry Standard Architecture,Instruction Set Architecture,International Seabed Authority
2396	ISAAA, International Service for the Acquisition of Agri-biotech Applications
2397	ISAF- International Sailing Federation,International Security Assistance Force
2398	ISAR, Inverse SAR (Synthetic Aperture Radar)
2399	ISB, Intermediate Staging Base
2400	ISBN, International Standard Book Number (ISO 2108)
2401	ISCCP, International Satellite Cloud Climatology Project
2402	ISCII, Indian Standard Code for Information Interchange
2403	ISDN,Integrated Services Digital Network
2404	ISEF, Intel International Science and Engineering Fair
2405	ISEN, Internet Search Environment Number
2406	ISF, Internal Security Force
2407	ISI-Indian Standards Institute, former name of the Bureau of Indian Standards,Inter-Services Intelligence (Pakistan),Islamic State of Iraq, an umbrella organization for several Iraqi insurgent groups
2408	ISIL,(i/a) Islamic State of Iraq and the Levant
2409	ISIS-(i/a) Institute for Science and International Security,Islamic State of Iraq and Syria
2410	ISK, Icelandic krona (ISO 4217 currency code)
2411	isl, Icelandic language (ISO 639-2 code)
2412	ISL, Iceland (ISO 3166 trigram)
2413	ISLN, International Standard Lawyer Number (used initially by LexisNexis Martindale-Hubbell)
2414	ISM- Industrial, scientific or medical, Interstellar medium
2415	ISMB, International Society of Matrix Biologists
2416	ISMC, Intelligent Sounding Meaningless Conversation
2417	ISOGP, Indian Society of Orthodontics for General Practitioners [2]
2418	ISP- International Standardized Profile,Internet Service Provider,Information Systems Professional
2419	ISPE,(a/i) International Society for Pharmacoepidemiology
2420	ISR- Intelligence, Surveillance and Reconnaissance, Israel (ISO 3166 trigram)
2421	ISRO, Indian Space Research Organisation
2422	ISS- International Shorebird Survey (North America),International Space Station
2423	ISSCR, International Society for Stem Cell Research
2424	ISSN, International standard serial number (ISO 3297)
2425	IST- Information System Technology,UCF Institute for Simulation and Training
2426	ISTAR, Intelligence, Surveillance, Target Acquisition, and Reconnaissance
2427	ISTC, Institute of Scientific and Technical Communications (UK)
2428	ISTS, Intel Science Talent Search
2429	ISU- Integrated Sight Unit,International Skating Union,IT[edit]
2430	it, Italian language (ISO 639-1 code)
2431	IT- InferoTemporal (neurophysiology),Information Technology, Italy (FIPS 10-4 country code; ISO 3166 digram)
2432	ita, Italian language (ISO 639-2 code)
2433	ITA, Italy (ISO 3166 trigram)
2434	ITAG, Inertial Terrain-Aided Guidance
2435	ITALY, I'll Truly Always Love You
2436	ITAS, Improved Target Acquisition Sight
2437	ITC, InferoTemporal Cortex (neurophysiology)
2438	ITCZ,(i/p) Intertropical Convergence Zone
2439	ITEC, Information Technology Exposition & Conference
2440	ITEMS, Interactive Tactical Environment Management System
2441	ITER, International Thermonuclear Experimental Reactor
2442	ITF, International Tennis Federation
2443	ITK, In The Know
2444	ITN, Independent Television News (British)
2445	ITS- Incompatible Time-sharing System,Individual Training Standards
2446	ITT, International Telephone and Telegraph (U.S.)
2447	ITTO, International Tropical Timber Organization
2448	ITU- Intent-to-Use,International Telecommunication Union (International Telegraph Union 1865-1932),IU[edit]
2449	iu, Inuktitut language (ISO 639-1 code)
2450	IUCN, International Union for the Conservation of Nature and Natural Resources (World Conservation Union)
2451	IUSS, Integrated Undersea Surveillance System,Integrated Unit Simulation System,International Union of Soil Sciences
2452	IV, Côte d'Ivoire (FIPS 10-4 country code; from Ivory Coast),Four (in Roman numerals), IntraVenous (as in intravenous drip or intravenous therapy)
2453	IVD, Internet Video Device, intra vas device
2454	Iveco, Industrial Vehicles Corporation
2455	IVF, In Vitro Fertilisation
2456	IVI, Interchangeable Virtual Instrument
2457	IVIS,(i/a) Inter-Vehicle Information System
2458	IVL, Inter-Visibility Line
2459	IVM, In Vitro [Oocyte] Maturation
2460	IVO, In Vicinity Of
2461	IW, Information Warfare
2462	IWARS, Infantry Warrior Simulation
2463	IWC, International Whaling Commission
2464	IWW, Industrial Workers of the World
2465	IX, Nine (in Roman numerals)
2466	IXT, IntraText digital library; IntraText lexical hypertext
2467	IY, Saudi-Iraqi neutral zone (FIPS 10-4 territory code; obsolete 1993)
2468	IZ, Iraq (FIPS 10-4 country code)
2469	J, Joule
2470	J1, Joint [Manpower &] Personnel Directorate
2471	J2, Joint Intelligence Directorate
2472	J2EE, Java 2 Platform, Enterprise ion
2473	J2ME, Java 2 Platform, Micro ion
2474	J2SE, Java 2 Platform, Standard ion
2475	J3, Joint Operations Directorate
2476	J4, Joint Logistics Directorate
2477	J5, Joint Strategic Plans & Policy Directorate
2478	J6, Joint Information Technology Directorate (Command, Control, Communications & Computer Systems)
2479	J7, Joint Operational Plans & Interoperability Directorate
2480	J8, Joint Force Structure, Resources, & Assessment Directorate
2481	J9, Joint Public Affairs Directorate (Civilian-Military Cooperation)
2482	ja, Japanese language (ISO 639-1 code)
2483	JA, Japan (FIPS 10-4 country code)
2484	JAFT, Just A Field Test
2485	JAG, Judge Advocate General Corps (military law)
2486	JAL, Japan Airlines
2487	JALLC, Joint Analysis and Lessons Learned Centre (NATO)
2488	JAM, Jamaica (ISO 3166 trigram)
2489	JAMA, Journal of the American Medical Association
2490	JANET, Joint Academic Network
2491	JANUS, Joint Academic Network Using Satellites (UK),Joint Army Navy Uniform Simulation, Joint Army-Navy Staff,Just ANother Useless Simulation (Note: The U.S. Army Janus simulation is not an acronym)
2492	JATO, Jet-Assisted Take-Off
2493	jav, Javanese language (ISO 639-2 code)
2494	JB, Junior Branch
2495	JB, Jail Bait
2496	JBFSA, Joint Blue Force Situational Awareness
2497	JCDB, Joint Common Data Base
2498	JCDS, Joint Chiefs of the Defence Staff
2499	JCIDS, Joint Capabilities Integration and Development System
2500	JCIET, Joint Combat Identification Evaluation Team
2501	JCL, Job Control Language
2502	JCMOTF, Joint Civil-Military Operations Task Force
2503	JCP, Java Community Process
2504	JCPM, Java Child Process Manager,Jesus Christ Prison Ministry
2505	JCS, Joint Chiefs of Staff
2506	JCW, Juggalo Championship Wrestling
2507	JDBC, Java Data Base Connectivity
2508	JDCC, UK Joint Doctrine and Concepts Centre, now the Development, Concepts, and Doctrine Centre, DCDC
2509	JDEM, Joint Dark Energy Mission
2510	JDK, Java Development Kit
2511	JDL, Jewish Defense League
2512	JDM- Japanese domestic market, referring specifically to automobiles and parts,Java Data Mining,Joint design manufacturing,JE[edit]
2513	JE, Jersey (FIPS 10-4 territory code)
2514	JEB- James Ewell Brown (Stuart),John Ellis Bush
2515	JEDP, Jahwist, Elohist, Deuteronomist, Priestly (according to the documentary hypothesis, the sources of the Torah)
2516	JEE, Java Platform, Enterprise ion
2517	JEFX, Joint Expeditionary Force eXperiment
2518	JEPD- Jahwist, Elohist, Priestly, Deuteronomist,Jointly Exhaustive, Pairwise Disjoint
2519	JET, Joint European Torus
2520	JEZ, Joint Engagement Zone
2521	JFACC, Joint Force Air Component Commander
2522	JFACTSU, U.S. Joint Forward Air Control Training and Standards Unit
2523	JFC, Joint Force Commander
2524	JFK, John Fitzgerald Kennedy or the airport named after him.
2525	JFLCC, Joint Force Land Component Commander
2526	JFMCC, Joint Force Maritime Component Commander
2527	JFO, Journal of Field Ornithology
2528	JFSOCC, Joint Force Special Operations Component Commander
2529	JFTX, Joint Field Training Exercise
2530	JH, Japan Highway Public Corporation
2531	JH, Jharkhand (Indian state code)
2532	JI, Joint Implementation
2533	JIB, Joint Information Bureau
2534	JIC, Joint Intelligence Centre
2535	JINI, Java Intelligent Network Infrastructure
2536	JITC, Joint Interoperability Test Command
2537	JIVE, Joint Institute for VLBI (Very Long Baseline Interferometry) in Europe
2538	JJAP, Japanese Journal of Applied Physics
2539	JK, Jedi Knight,Just Kidding, Spanair (IATA airline designator),Jammu & Kashmir (Indian state code)
2540	JL, Japan Airlines (IATA airline designator)
2541	JLA, Justice League of America
2542	JM, Jamaica (FIPS 10-4 country code; ISO 3166 digram)
2543	JMD, Jamaican dollar (ISO 4217 currency code)
2544	JMS, Java Message Service
2545	JN, Jan Mayen Island (FIPS 10-4 territory code)
2546	JNI, Java Native Interface
2547	JNLP, Java Network Launch Protocol
2548	JO, Jordan (FIPS 10-4 country code; ISO 3166 digram)
2549	JOA,(a/i) Joint Operations Area
2550	JOD, Jordanian dinar (ISO 4217 currency code)
2551	JOPES, Joint Operations Planning and Execution System
2552	JOR, Jordan (ISO 3166 trigram)
2553	JOTS, Joint Operations Tactical System
2554	JSP, Joint Services Publication
2555	JP, Japan (ISO 3166 digram), Justice of the Peace
2556	JPL, Jet Propulsion Laboratory
2557	jpn, Japanese language (ISO 639-2 code)
2558	JPN, Japan (ISO 3166 trigram)
2559	JPOW, Joint Project Optic Windmill
2560	JPY, Japanese yen (ISO 4217 currency code)
2561	JQ, Jetstar Airways (IATA airline designator), Johnny Quick, Johnston Atoll (FIPS 10-4 territory code), Jonny Quest,Joshua Quagmire
2562	JRA, Japanese Red Army,Joint Rear Area
2563	JRDF, Joint Rapid Deployment Forces
2564	JRE, Java Runtime Environment
2565	JREF, James Randi Educational Foundation
2566	JROC, Joint Requirements Oversight Council
2567	JROCM, JROC Memorandum
2568	JRRF, Joint Rapid Reaction Force
2569	JRSAI,Journal of the Royal Society of Antiquaries of Ireland
2570	JSAP, Japan Society of Applied Physics
2571	JSCSC, Joint Services Command and Staff College
2572	JSEAD, Joint Suppression of Enemy Air Defence (see SEAD)
2573	JSF, Joint Strike Fighter
2574	JSIMS, Joint Simulation System
2575	JSOA, Joint Special Operations Area
2576	JSOTF, Joint Special Operations Task Force
2577	JSP, JavaServer Page
2578	JSR, Java Specification Request
2579	JSS, Joint Support Ship Project
2580	JT, Johnston Atoll (ISO 3166 digram; obsolete 1986), Junior Technician (RAF)
2581	JTC, Joint Training Confederation
2582	JTF, Joint Task Force
2583	JTFEX, Joint Task Force Exercise
2584	JTLS, Joint Theater Level Simulation
2585	JTMD, Joint Theatre Missile Defence
2586	JTN, Johnston Atoll (ISO 3166 trigram; obsolete 1986)
2587	JU, Juan de Nova Island (FIPS 10-4 territory code)
2588	JUGFET, JUnction Gate Field-Effect Transistor
2589	JUICE, JUpiter ICy Moon Explorer
2590	JUO, Joint Urban Operations
2591	jv, Javanese language (ISO 639-1 code)
2592	JV, Joint Venture,Junior Varsity
2593	JVM, Java Virtual Machine
2594	JW, Jehovah's Witnesses
2595	JWARS, Joint Warfare System (simulation)
2596	JWP, Joint Warfare Publication
2597	JWST, James Webb Space Telescope
2598	JY, Japanese Yen
2599	JZ, Joint Zone
2600	k, Kilo-
2601	K, Kelvin,Potassium (Latin Kalium),Tanker (aircraft designation code)
2602	K9, Canine Police Unit
2603	ka, Georgian language (ISO 639-1 code)
2604	kA, Kiloampere
2605	Ka, Kamov Design Bureau
2606	KA, Knowledge Acquisition, Karnataka (Indian state code)
2607	KAF,(i/a) Kandahar Air Field
2608	kal, Kalaallisut language (ISO 639-2 code)
2609	kan, Kannada language (ISO 639-2 code)
2610	KARNAC, Knowledge Aided Retrieval in Activity Context
2611	KARR, Knight Automated Roving Robot (Knight Rider character)
2612	kas, Kashmiri language (ISO 639-2 code)
2613	kat, Georgian language (ISO 639-2 code)
2614	KATUSA, Korean Augmentation To United States Army
2615	kau, Kanuri language (ISO 639-2 code)
2616	kaz, Kazakh language (ISO 639-2 code)
2617	KAZ, Kazakhstan (ISO 3166 trigram)
2618	KBE, Knight Commander of the Order of the British Empire
2619	KBO, Kuiper Belt Object
2620	KBVB, Koninklijke Belgische Voetbalbond (Dutch for Royal Belgian Football Association)
2621	kC, Kilocoulomb
2622	KCL, King's College London
2623	KCS, Kansas City Southern Railway (AAR reporting mark)
2624	KD, Kawasaki Disease,Kraft Dinner
2625	KE- Kenya (FIPS 10-4 country code; ISO 3166 digram), Kinetic Energy,Knowledge Engineering
2626	KEDO, Korean Peninsula Energy Development Organization
2627	KEN, Kenya (ISO 3166 trigram)
2628	KERA, Kentucky Education Reform Act (of 1990)
2629	kerma, Kinetic Energy Released in MAterial / in MAtter / per unit MAss
2630	KES- Kenyan shilling (ISO 4217 currency code), Killer Elite Squad (Japanese professional wrestling stable)
2631	KESR, Kent and East Sussex Railway.
2632	KET- Kentucky Educational Television, Key English Test,KF[edit]
2633	kF, Kilofarad
2634	KFC, Kentucky Fried Chicken
2635	KFOR, UN Kosovo Force
2636	KFUPM,King Fahd University of Petroleum & Minerals
2637	kg, Kilogram,Kongo language (ISO 639-1 code)
2638	KG, Kyrgyzstan (FIPS 10-4 country code; ISO 3166 digram)
2639	KGO,Knight of the Guelphic Order of Hanover
2640	KGS, Kyrgyz som (ISO 4217 currency code)
2641	KGZ, Kyrgyzstan (ISO 3166 trigram)
2642	kH, Kilohenry
2643	KH, Cambodia (ISO 3166 digram)
2644	khm, Khmer language (ISO 639-2 code)
2645	KHL, Kontinental Hockey League
2646	KHM, Cambodia (ISO 3166 trigram)
2647	KHR, Cambodian riel (ISO 4217 currency code)
2648	KHz, Kilohertz
2649	ki, Gikuyu language (ISO 639-1 code)
2650	Ki, Kibi
2651	KI, Kiribati (ISO 3166 digram)
2652	KIA, Killed In Action
2653	KIDS, Knowledge-based Integrated Design System
2654	kik, Gikuyu language (ISO 639-2 code), common typo for LOL
2655	kin, Kinyarwanda language (ISO 639-2 code)
2656	kir, Kyrgyz language (ISO 639-2 code)
2657	KIR, Kiribati (ISO 3166 trigram)
2658	KISS, Keep It Simple, Stupid / Keep It Short and Simple,Korean Intelligence Support System
2659	KITECH, Korean Institute of Industrial Technology
2660	KITT, Knight Industries Two Thousand,Knight Industries Three Thousand
2661	KIT,Keep In Touch
2662	kj, Kuanyama language (ISO 639-1 code)
2663	kJ, Kilojoule
2664	kk, Kazakh language (ISO 639-1 code)
2665	kK, Kilokelvin
2666	KKK, Ku Klux Klan
2667	kl, Kalaallisut language (ISO 639-1 code)
2668	kL, Kilolitre
2669	KL, Kuala Lumpur, Kerala (Indian state code)
2670	KLENOT, KLEť Observatory Near Earth and Other unusual objects observations Team and Telescope
2671	KLOC, Kilo Lines Of Code
2672	km, Khmer language (ISO 639-1 code),Kilometre
2673	KM, Comoros, Knowledge Management
2674	KMF, Comoro franc (ISO 4217 currency code)
2675	KMR, Kwajalein Missile Range
2676	kn, Kannada language (ISO 639-1 code)
2677	kN, Kilonewton
2678	KN, Democratic People's Republic of Korea (FIPS 10-4 country code),Saint Kitts and Nevis (ISO 3166 digram)
2679	KNA, Saint Kitts and Nevis (ISO 3166 trigram)
2680	KNVB, Koninklijke Nederlandse Voetbal Bond (Dutch for Royal Dutch Football Association)
2681	ko, Korean language (ISO 639-1 code)
2682	KO, Knocked Out
2683	kom, Komi language (ISO 639-2 code)
2684	kon, Kongo language (ISO 639-2 code)
2685	kor, Korean language (ISO 639-2 code)
2686	KOR, Republic of Korea (ISO 3166 trigram)
2687	KP, Kim Possible
2688	KPMG, Klynveld, Peat, Marwick, Goerdeler
2689	KPNO, Kitt Peak National Observatory
2690	KPW, North Korean won (ISO 4217 currency code)
2691	KQ, Kenya Airways (IATA airline designator),Kingman Reef (FIPS 10-4 territory code)
2692	kr, Kanuri language (ISO 639-1 code)
2693	Kr, Krypton
2694	KR, Kiribati (FIPS 10-4 country code),Republic of Korea (ISO 3166 digram)
2695	KRW, South Korean won (ISO 4217 currency code)
2696	ks- Kashmiri language (ISO 639-1 code),Kilosecond
2697	kS, Kilosiemens
2698	KS- Kansas (postal symbol),Republic of Korea (FIPS 10-4 country code)
2699	KSC, Kennedy Space Center
2700	KSI, Killed or Seriously Injured
2701	KSM- Korean Service Medal,Khalid Sheikh Mohammed
2702	KSU, Kansas State University
2703	kT, Kilotesla
2704	KT, Christmas Island (FIPS 10-4 territory code), Knight of the Order of the Thistle,Knights Templar
2705	KTS, Knight of the Tower and Sword (of Portugal)
2706	ku, Kurdish language (ISO 639-1 code)
2707	KU, Kuwait (FIPS 10-4 country code)
2708	kua, Kuanyama language (ISO 639-2 code)
2709	KUL, Katholieke Universiteit Leuven (Flemish, Catholic University of Leuven)
2710	kur, Kurdish language (ISO 639-2 code)
2711	KUW, Kuwait (UNDP country code, IOC and FIFA trigram, but not ISO 3166)
2712	kv, Komi language (ISO 639-1 code)
2713	kV, Kilovolt
2714	KV, Kosovo
2715	KVM, Keyboard, Video, Mouse switch
2716	KVT, Killer-Victim Table (military simulations)
2717	kw, Cornish language (ISO 639-1 code)
2718	kW, Kilowatt
2719	KW, Kuwait (ISO 3166 digram)
2720	KWB,Kids' WB!
2721	KWD, Kuwaiti dinar (ISO 4217 currency code)
2722	KWT, Kuwait (ISO 3166 trigram)
2723	KX, Cayman Airways (IATA airline designator)
2724	ky, Kyrgyz language (ISO 639-1 code)
2725	KY- Cayman Islands (ISO 3166 digram),Kentucky (postal symbol)
2726	KYD, Cayman Islands dollar (ISO 4217 currency code)
2727	KZ, Kazakhstan (FIPS 10-4 country code; ISO 3166 digram)
2728	KZN, KwaZulu-Natal
2729	KZT, Kazakh tenge (ISO 4217 currency code)
2730	L, Fifty (in Roman numerals), Label,Lap,Large,Laser (US military aircraft basic mission designation),Latin,Left, Litre, Low (transmissions)
2731	la, Latin language (ISO 639-1 code)
2732	La, Lanthanum
2733	LA- Laos (FIPS 10-4 country code; ISO 3166 digram),Louisiana (postal symbol), Los Angeles
2734	LAAS- Local Area Augmentation System,Los Angeles Astronomical Society
2735	LAB, Logistics Assault Base
2736	LabVIEW, Laboratory Virtual Instrumentation Engineering Workbench
2737	LACMA,(a/i) Los Angeles County Museum of Art
2738	LAD, Laser Aiming Device
2739	LADW, Local Air Defence Warning
2740	LAESI, Local Authority & Emergency Service Information
2741	LAK, Laotian kip (ISO 4217 currency code)
2742	LAMP,(multiple meanings)
2743	LAN, Local Area Network
2744	LANL, Los Alamos National Laboratory
2745	lao, Lao language (ISO 639-2 code)
2746	LAO, Laos (ISO 3166 trigram)
2747	LAPD, Los Angeles Police Department
2748	LAR- Light Armoured Reconnaissance,Logistics Assistance Representative
2749	LARC, Livermore Advanced Research Computer (cf. LLNL)
2750	LARP, Live-Action Role-Playing
2751	LAS, McCarran International Airport (Las Vegas, Nevada)
2752	Laser, Light Amplification by Stimulated Emission of Radiation (cf. Maser)
2753	lat, Latin language (ISO 639-2 code)
2754	LAT-(i/a) Lowest Astronomical Tide (nautical charts),Licensed Athletic Trainer (used in many of the United States; see www.oata.org)
2755	LATA, Local Access Transport Area
2756	LATCH, Lower Anchors and Tethers for Children (U.S. standard for attachment points for child safety seats in passenger cars)
2757	lav, Latvian language (ISO 639-2 code)
2758	LAV- Land Assault Vehicle,Light Armoured Vehicle,Lymphadenopathy-Associated Virus
2759	LAW, Light Antitank Weapon
2760	LAX- Los Angeles International Airport, The Latin American Xchange (professional wrestling),LB[edit]
2761	lb- pound (Latin librum),Luxembourgish language (ISO 639-1 code)
2762	LB, Lebanon (ISO 3166 digram)
2763	LBH- Light Battlefield Helicopter,Lyman-Birge-Hopfield bands
2764	LBJ- Lady Bird Johnson,LeBron James,Light Bulb Joke,Little Beagle Johnson (the dog owned by Lyndon and Lady Bird Johnson),Lyndon Baines Johnson
2765	LBN, Lebanon (ISO 3166 trigram)
2766	LBNL, Lawrence Berkeley National Laboratory
2767	LBP, Lebanese pound (ISO 4217 currency code)
2768	LBR, Liberia (ISO 3166 trigram)
2769	LBS, Location-Based Services
2770	lbs, pounds (plural form of lb, see above)
2771	LBT, Large Binocular Telescope
2772	LBW, Leg Before Wicket
2773	LBY, Libya (ISO 3166 trigram)
2774	LC, Line of Contact, Saint Lucia (ISO 3166 digram)
2775	LCA, Saint Lucia (ISO 3166 trigram)
2776	LCC, Land Component Commander
2777	LCCP, Light Contingency Communications Package
2778	LCD, Liquid Crystal Display
2779	LCE, Leaving Certificate Examination,Load Carrying Equipment,London Commodity Exchange
2780	LCM, Least/Lowest Common Multiple
2781	LCol, Lieutenant-Colonel (Canada, UK)
2782	LCS,League of Legends Championship Series
2783	LD- Laser Designator,Limited Deployment,Line of Departure
2784	LDA, Lateral Drift Apparatus (paratroops)
2785	LDC, Lesser Developing/Developed Country
2786	LDL, Low-Density Lipoprotein
2787	LDV, Local Defence Volunteers (British Home Guard)
2788	LDW,Lane Departure Warning (ADAS)
2789	LE, Lebanon (FIPS 10-4 country code)
2790	LEC, Local Exchange Carrier
2791	LED, Light-Emitting Diode
2792	Legs, level emotion gad speed
2793	LEGAD, Legal Advice
2794	LEMOSS, Long-Endurance MObile Submarine Simulator
2795	LEN, Large Extension Node
2796	LEO, Low Earth orbit
2797	LEP, Large Electron-Positron collider
2798	LER, Loss-Exchange Ratio
2799	LEU, Low-Enriched Uranium
2800	LF, Low Frequency
2801	LFO, Low Frequency Oscillation / Oscillator
2802	LFTR, Liquid fluoride thorium reactor
2803	lg, Luganda (ISO 639-1 code)
2804	LG, Latvia (FIPS 10-4 country code)
2805	LGB- Lesbian, Gay, Bisexual,Laser-guided bomb, self-explanatory
2806	LGBT, Lesbian, Gay, Bisexual, Transgender
2807	LGLO, Love God, Love Others
2808	LGM, Little Green Men
2809	LGS, Landsat Ground Station
2810	LH, Lithuania (FIPS 10-4 country code), Luteinising Hormone
2811	LHC, Large Hadron Collider
2812	LHS, Left Hand Side
2813	li, Limburgish language (ISO 639-1 code)
2814	Li, Lithium
2815	LI, Fifty-one (in Roman numerals), Liberia (FIPS 10-4 country code),Liechtenstein (ISO 3166 digram)
2816	LIBOR, London Interbank Offered Rate
2817	LIBS, Laser Induced Breakdown Spectroscopy
2818	LIE, Liechtenstein (ISO 3166 trigram)
2819	LIFO, Last In, First Out
2820	LIGO, Laser Interferometer Gravitational-Wave Observatory
2821	lim, Limburgish language (ISO 639-2 code)
2822	lin, Lingala language (ISO 639-2 code)
2823	LINEAR, Lincoln Near-Earth Asteroid Research
2824	LISA, Laser Interferometer Space Antenna
2825	lit, Lithuanian language (ISO 639-2 code)
2826	LITAS, Low Intensity Two Colour Approach System (aviation)
2827	LIVE, Liquid Inertial Vibration Eliminator
2828	LJ- La Jolla,Larry Johnson (both the American football and basketball players of that name),LaserJet (HP printer brand),Library Journal,Linux Journal,LiveJournal,Ljubljana,Lord Justice of Appeal, Sierra National Airlines (IATA code)
2829	LJJ, Lord Justices of Appeal
2830	LK, Sri Lanka (ISO 3166 digram)
2831	LKA, Sri Lanka (ISO 3166 trigram)
2832	LKR, Sri Lanka rupee (ISO 4217 currency code)
2833	LKR4, Linkwitz-Riley 4th order (audio crossover type)
2834	LL, Land Line (telephone),Last Log,Late Latin,Left Limit,Lex Luthor (Superman character),Light Line,Limited Liability,Linked List,Little League
2835	LLAD, Low Level Air Defence
2836	LLB, Legum Baccalaureus (Latin: Bachelor of Laws)
2837	LLC, Limited Liability Company
2838	LLGC, Llyfrgell Genedlaethol Cymru (National Library of Wales),London Lesbian and Gay Centre
2839	LLLTV, Low-Light Level Television
2840	LLNL, Lawrence Livermore National Laboratory
2841	LLP, Limited Liability Partnership
2842	LLTI, Limiting Long-Term Illness,Long Lead Time Item
2843	LLTR, Low-Level Transit Route
2844	LMAO, Laughing My Ass Off (Internet shorthand)
2845	LMFAO, Laughing My F**king Ass Off (Internet shorthand, electro-hop duo)
2846	LMB, Lick My Balls
2847	LMN,(a/i) Lifetime Movie Network
2848	LMS, London Mathematical Society,London, Midland and Scottish (Railway)
2849	LMS, Like My Status (Internet shorthand)
2850	LMV,() Light Motor Vehicle
2851	ln- Lingala language (ISO 639-1 code),Natural logarithm
2852	LNER, London and North Eastern Railway
2853	LNG, Liquefied Natural Gas
2854	LNO, Liaison Officer
2855	lo, Lao language (ISO 639-1 code)
2856	LO, Slovakia (FIPS 10-4 country code)
2857	LOA, Limit Of Advance
2858	LOC,(a/i) Level of Operational Capability,Limited Operational Capability,Lines Of Code,Lines Of Communication,see entry
2859	LOD,Limit of Detection,see Detection limit
2860	LoD, Lines of Development (UK)
2861	LOFAR, Low Frequency Analysis and Recording
2862	LOGPAC, Logistics Package
2863	LOL, Laughing Out Loud (Internet shorthand)
2864	LOMEZ, Low Altitude Missile Engagement Zone
2865	LONEOS, Lowell Observatory Near-Earth-Object Search
2866	LOOGY,(p/a) Lefty One-Out GuY, a sometimes pejorative nickname for the left-handed specialist in baseball
2867	LORTID, LOng Range Target IDentification
2868	LOS, Line Of Sight
2869	LOSAT, Line-Of-Sight Anti-Tank (missile)
2870	LOTA, Licentiate of the Orthodontic Technicians Association
2871	LOTIS, Livermore Optical Transient Imaging System
2872	LOTS, Logistics Over-The-Shore
2873	LP, Linkin Park,Linkup Point,Listening Post,Long Playing record,Louisiana Pacific (cf. LP Field)
2874	LPC, Linear Predictive Coding
2875	LPD, Landing Platform Dock (Navy hull classification),Low Probability of Detection
2876	LPG, Liquefied Petroleum Gas (cf. LNG)
2877	LPI, Low Probability of Intercept
2878	LPS, Landsat Processing System, LipoPolySaccharide
2879	LQ, Palmyra Atoll (FIPS 10-4 territory code)
2880	Lr, Lawrencium
2881	LR, Liberia (ISO 3166 digram)
2882	LRC, Logistics iness Center
2883	LRD, Liberian dollar (ISO 4217 currency code)
2884	LRF, Laser rangefinder, Low iness Forces
2885	LRGW, Long-Range Guided Weapon
2886	LRICBM, Limited Range ICBM
2887	LRIP, Low Rate Initial Production
2888	LRP, Logistics Release Point
2889	LRPE, Long-Range Planning Element
2890	LRS, Long Range Surveillance
2891	LRU, Line-Replaceable Unit
2892	LSE- Least Squares Estimate/Error,London School of Economics,London Stock Exchange
2893	LSI, Large-Scale Integration
2894	LSIF, Labour Sponsored Investment Fund
2895	LSL, Lesotho loti (ISO 4217 currency code)
2896	LSND, Liquid Scintillator Neutrino Detector
2897	LSO, Lesotho (ISO 3166 trigram)
2898	LSST, Large Synoptic Survey Telescope
2899	LSVW, Light Support Vehicle, Wheeled
2900	lt, Lithuanian language (ISO 639-1 code)
2901	Lt, Lieutenant
2902	LtC, Lieutenant-Colonel (U.S.)
2903	LT, Lesotho (FIPS 10-4 country code),Lithuania (ISO 3166 digram)
2904	LTC, Long-Term Costing
2905	Ltd, Limited
2906	LTDP, Long-Term Defence Plan
2907	LTG, Lieutenant General, Lightning (METAR Code)
2908	LTI, Linear Time-Invariant
2909	LTM,Acronym for Laughing To Myself
2910	LTL, Lithuanian litas (ISO 4217 currency code)
2911	LTP, Long-Term Potentiation
2912	LTU, Lithuania (ISO 3166 trigram)
2913	ltz, Luxembourgish language (ISO 639-2 code)
2914	lu, Tshiluba language (ISO 639-1 code)
2915	Lu, Lutetium
2916	LU, Acronym Love You
2917	LU,Loonatics Unleashed
2918	lub, Tshiluba language (ISO 639-2 code)
2919	LUCA, Last Universal Common Ancestor
2920	lug, Luganda (ISO 639-2 code)
2921	LUG, Linux User Group
2922	LULU, Locally Unwanted Land Use (urbanism)
2923	LUT, Limited User Test (ing),Local User Terminal
2924	LUVW, Light Utility Vehicle, Wheeled
2925	LUX, Luxembourg (ISO 3166 trigram)
2926	lv, Latvian language (ISO 639-1 code)
2927	LV- Las Vegas, Latvia (ISO 3166 digram), Launch Vehicle,Leading Vehicle, Leave, Left Ventricle,Level Valve,Linking Verb,Liverpool Victoria
2928	LVA, Latvia (ISO 3166 trigram)
2929	LVAD- Left Ventricular Assist Device, Low-Velocity Airdrop
2930	LVEF, Left Ventricular Ejection Fraction
2931	LVL, Latvian lats (ISO 4217 currency code)
2932	Lw, Lawrencium (obsolete 1963)
2933	LW, Land Warrior,Low Water (nautical charts)
2934	LWR, Laser warning receiver
2935	LWRC, Land Warfare Resources Corporation
2936	LWS, Land Warrior System
2937	LX, Luxembourg (amateur radio ITU prefix),Swiss International Air Lines (IATA code)
2938	LX, Electrics (theatrical term)
2939	LY, Libya (FIPS 10-4 country code; ISO 3166 digram),Lithuania (amateur radio ITU prefix)
2940	LYAO,Laugh Your Ass Off
2941	LYD, Libyan dinar (ISO 4217 currency code)
2942	LYLAS, Love You Like A Sister
2943	LZ, Bulgaria (amateur radio ITU prefix), Landing Zone
2944	m, Metre,Milli
2945	M, Mega-,One thousand (in Roman numerals)
2946	mA, Milliampere
2947	Ma, Megaannum
2948	MA- Madagascar (FIPS 10-4 country code), Marijuana Anonymous, Master of Arts,Massachusetts (postal symbol),Megaampere,Morocco (ISO 3166 digram)
2949	MAA, Mathematical Association of America
2950	MAAC, Metro Atlantic Athletic Conference
2951	MAC- Macau (ISO 3166 trigram), U.S. Military Airlift Command (1966-1992),Mid-American Conference
2952	MACA, Military Aid to the Civil Authorities
2953	MACE, Multi-Agent Computing Environment
2954	MACHO, MAssive Compact Halo Object
2955	MAD- Magnetic Anomaly Detector, Moroccan dirham (ISO 4217 currency code), Mutual Assured Destruction
2956	MADD- Mothers Against Drunk Driving,MyoAdenylate Deaminase Deficiency, Multiply-Add
2957	MAF, Maintenance Action Form
2958	MAFF, Ministry of Agriculture, Forestry and Fisheries (various countries)
2959	MAGIC, Major Atmospheric Gamma-ray Imaging Cherenkov (telescope)
2960	MAGNETAR, Metaprogrammable AGent NETwork ARchitecture
2961	MAGTF, Marine Air-Ground Task Force
2962	mah, Marshallese language (ISO 639-2 code)
2963	mal, Malayalam language (ISO 639-2 code)
2964	MALD, Miniature Air-Launched Decoy
2965	MANPADS, MAN-Portable Air Defence System
2966	MANPRINT, MANpower and PeRsonnel INTegration
2967	MAO-(i/a) Molėtų astronomijos observatorija (Moletai Astronomical Observatory), MonoAmine Oxidase
2968	MAOI, Monoamine oxidase inhibitor
2969	MAPS, Monitoring Avian Productivity and Survivorship
2970	mar, Marathi language (ISO 639-2 code)
2971	MAR, Morocco (ISO 3166 trigram)
2972	MarBEF, Marine Biodiversity and Ecosystem Functioning
2973	MARC- MAchine able Cataloging (often also defined as MAchine able Code),Mailing list ARChive,Massachusetts Animal Rights Coalition,Mid-America Regional Council
2974	MARCENT, United States Marine Forces Central Command
2975	MARFORCC, Marine Force Component Commander
2976	MARRS, Martyn Young, Alex Ayuli, Rudy Tambala, Russell Smith, and Steve Young (British electronic music act)
2977	MAS, NATO Military Agency for Standardization
2978	MASAS, Monte Agliale Supernovae and Asteroid Survey
2979	Maser, Microwave Amplification by Stimulated Emission of Radiation
2980	MASH, Mobile Army Surgical Hospital
2981	MASINT, Measurement And Signature Intelligence
2982	MATREX, Modeling Architecture for Technology, Research & EXperimentation
2983	MATS, U.S. Military Air Transport Service (1948-1966)
2984	MAVS,(a/i) Mobile Artillery Vehicle System
2985	MAW, Malawi (IOC trigram, but not FIFA or ISO 3166)
2986	MB, Manitoba (postal symbol),Martinique (FIPS 10-4 territory code),Medal of Bravery (Canada)
2987	MBA, Main Battle Area,Main Belt Asteroid,Masters of Business Administration
2988	MBI, Moody Bible Institute
2989	MBBL, (U.S. Armor Center) Mounted Battlespace Battle Laboratory
2990	MBCC, Migratory Bird Conservation Commission (U.S.)
2991	MBCS, Multi-Byte Character Set
2992	MBE, Member of the Order of the British Empire, Multistate Bar Examination (U.S.)
2993	MBIDST, Member of the British Institute of Dental and Surgical Technologists
2994	MBM, Meat and Bone Meal
2995	mbsf,metres below sea floor,[1][2] a depth convention used in paleontology and oceanography
2996	MBT, Main Battle Tank
2997	MBTA, Massachusetts Bay Transportation Authority,Migratory Bird Treaty Act (U.S.)
2998	MBTI, Myers-Briggs Type Indicator
2999	mC, Millicoulomb
3000	MC- Macau (FIPS 10-4 territory code), Master of Ceremonies, Megacoulomb, Military Cross (bravery award), Monaco (ISO 3166 digram), Mortar Carrier, Eleven Hundred (in Roman numerals)
3001	MCA- Master of Computer Applications,Micro Channel Architecture,MultiChannel Analyzer,Music Corporation of America, the original name of the now-defunct MCA Inc.
3002	MCC- Marylebone Cricket Club,Mission Control Center,Motor Control Center,Movement Control Centre
3003	MCD- Minimal Cerebral Dysfunction,Minor civil division (U.S. Census term)
3004	MCDL, Model Composition Definition Language
3005	MCFT, Modified Compression Field Theory
3006	MCG, Melbourne Cricket Ground
3007	MCI, Microwave Communications, Inc.
3008	MCIS, Mellon Collie and the Infinite Sadness
3009	MCM, Mine Counter-Measures
3010	MCMV, Mine Counter-Measure Vessel
3011	MCNC- Microelectronics Center of North Carolina, Mixing Condensation Nucleus Counter
3012	MCO- Major Combat Operation, Monaco (ISO 3166 trigram), Movement Control Officer
3013	MCP- Maintenance Collection Point,Male Chauvinist Pig
3014	MCR, My Chemical Romance
3015	MCSF, Marine Corps Security Forces
3016	MCT, Movement Control Team
3017	MCTIS, Mounted Co-operative Target Identification System
3018	MCU- Marine Corps University,Marvel Cinematic Universe,Medium close-up (camera direction in British TV scripts), Microcontroller unit, Milk clotting units,Ming Chuan University,Minimum coded unit (digital imaging),Multipoint control unit,Municipal Credit Union (New York),MD[edit]
3019	Md, Mendelevium
3020	MD- Fifteen Hundred (in Roman numerals),Maryland (postal symbol), Medicinae Doctor (Doctor of Medicine/Medical Doctor),Mentioned in Dispatches (military), Moldova (FIPS 10-4 country code; ISO 3166 digram)
3021	MDA- Main Defensive Action/Area, Moldova (ISO 3166 trigram),Muscular Dystrophy Association
3022	MDF- Main distribution frame,Medium-density fiberboard
3023	MDG- Madagascar (ISO 3166 trigram), UN Millennium Development Goal
3024	MDL, Moldovan leu (ISO 4217 currency code)
3025	MDM- Michigan Dartmouth MIT telescope consortium,Master data management
3026	MDNA, Madonna's 12th studio album title (2012)
3027	MDO, Membership Driven Organisation
3028	MDP, Markov Decision Process
3029	MDT, Mountain Daylight Time (UTC-6 hours)
3030	MDV, Maldives (ISO 3166 trigram)
3031	MDW- Chicago Midway International Airport in Chicago (IATA airport code), Military District of Washington, Minnesota, Dakota and Western Railway (AAR reporting mark),ME[edit]
3032	Me, Messerschmitt
3033	ME, Maine (postal symbol), Mechanical engineer[ing],Medical examiner,Middle East, Middle East Airlines (IATA code), Memory Effect,Myalgic Encephalomyelitis
3034	MEA, Maine Educational Assessment,Middle East Airlines,Millennium Ecosystem Assessment,Minimum en route altitude,Mono-ethanol Amine,Multilateral Environmental Agreement
3035	MEAC, Mid-Eastern Athletic Conference (ME-ac)
3036	MEC- Maine Central Railroad,Manta, Ecuador (IATA location identifier), Model European Council,Mountain East Conference,Mountain Equipment Co-op
3037	MECC, Minnesota Educational Computing Consortium (later Corporation, dissolved 1999)
3038	MECCA, Milwaukee Exposition Convention Center and Arena, a former name for the sports venue now known as UW-Milwaukee Panther Arena
3039	MECO, Main engine cutoff (NASA code for point in Space Shuttle assent when three main engines are shut down prior to External Tank (ET) separation)
3040	MEDEVAC, Medical evacuation
3041	MEDLI, Mars Science Laboratory Entry, Descent, and Landing Instrumentation, Medical & Scientific Libraries of Long Island, Model for Effluent Disposal using Land Irrigation
3042	MEDS, Mission Essential Data Set
3043	MEF, U.S. Marine Expeditionary Force,Minimum essential facility,Mission essential force
3044	MEG, MagnetoEncephaloGraphy
3045	MEI, Matsushita Electric Industrial Co., Ltd.
3046	MEK, Magyar Elektronikus Konyvtar,Message encryption key,Methyl ethyl ketone, Mujahideen al-Khalq
3047	MEL, Maya Embedded Language,Michigan Electronic Library
3048	MELT, Metallic Line/Loop Test (ing)
3049	MEM, Message Exchange Mechanism, Microelectromechanical
3050	MEMS, Microelectromechanical System
3051	MEO, Medium earth orbit,Most efficient organization
3052	MER, Mars Exploration Rover
3053	MERL, Mitsubishi Electric Research Laboratories
3054	MES, Marconi Electronic Systems,Medium Edison screw
3055	MESSENGER, MErcury Surface, Space ENvironment, GEochemistry and Ranging
3056	MET, Meteorological, Middle European Time
3057	METAR, [Meteorological] Aviation Routine weather report
3058	METOC, Meteorological and Oceanographic
3059	MEU, U.S. Marine Expeditionary Unit,Maximum Expected Utility
3060	MeV, Megaelectronvolt
3061	MEV, Medical Evacuation Vehicle,Musica Elettronica Viva
3062	MEX, Mexico (ISO 3166 trigram)
3063	MEZ, Missile Engagement Zone
3064	MES, Manufacturing Execution Systems
3065	mF, Millifarad
3066	MF, Mayotte (FIPS 10-4 territory code),Megafarad
3067	MFSB, Mother, Father, Sister, Brother (1970s Philadelphia studio musicians collective)
3068	mg, Malagasy language (ISO 639-1 code),Milligram
3069	Mg, Magnesium,Megagram
3070	MG, Machine Gun, Madagascar (ISO 3166 digram), Major General, Mongolia (FIPS 10-4 country code), Morris Garage
3071	MGA, Malagasy ariary (ISO 4217 currency code)
3072	MGB, Medium Girder Bridge, Motor Gun Boat
3073	MGM, Metro Goldwyn Mayer, Montgomery, Alabama (Airport Code)
3074	MGPAM,My Gym Partner's a Monkey
3075	MGS, Mobile Gun System
3076	mh, Marshallese language (ISO 639-1 code)
3077	mH, Millihenry
3078	MH, Marshall Islands (postal symbol; ISO 3166 digram),Megahenry,Montserrat (FIPS 10-4 territory code)
3079	MHC, Major Histocompatibility Complex
3080	MHHW, Mean Higher High Water (nautical charts)
3081	MHL, Marshall Islands (ISO 3166 trigram)
3082	MHLW, Mean Higher Low Water (nautical charts)
3083	MHRA, (UK) Medicines and Healthcare products Regulatory Agency
3084	MHW, Mean High Water (nautical charts)
3085	MHWN, Mean High Water Neaps (nautical charts)
3086	MHWS, Mean High Water Springs (nautical charts)
3087	MHz, Megahertz
3088	mi, Māori language (ISO 639-1 code)
3089	Mi, Mebi
3090	MI- Malawi (FIPS 10-4 country code),Michigan (postal symbol),Midway Islands (ISO 3166 digram; obsolete 1986), Military Intelligence
3091	MIA, Missing In Action
3092	MIAA- Maryland Interscholastic Athletic Association,Massachusetts Interscholastic Athletic Association,Michigan Intercollegiate Athletic Association,Mid-America Intercollegiate Athletics Association
3093	MIB- Men In Black,Mint In Box (Internet auction/trading listings)
3094	MIC, Military Industrial Complex
3095	MICLIC, Mine Clearing Line Charge
3096	MICOM, Missile Command
3097	MICV, Mechanised Infantry Combat Vehicle
3098	MID, Midway Islands (ISO 3166 trigram; obsolete 1986)
3099	MIDI, Musical Instrument Digital Interface
3100	MIDAS, Man-machine Integration Design and Analysis System
3101	MIDS, Multi-Function Information Distribution System
3102	MIFC, Military Industrial Financial Complex
3103	MIFG, Shallow Fog (METAR Code)
3104	MIFPC, Military Industrial Financial Pharmaceutical Complex
3105	MIKE, Monitoring of Illegal Killing of Elephants
3106	MIL, Man-In-the-Loop
3107	MILC, Mirrorless interchangeable-lens camera
3108	MILES, Multiple Integrated Laser Engagement System (live combat simulation)
3109	MILF- Moro Islamic Liberation Front, Mother I'd Like to Fuck
3110	MILSATCOM, Military Satellite Communications
3111	MILSTRIP, Military Standard Requisitioning and Issue Procedure DLMSO MILSTRIP Manual
3112	MIMAROPA, Mindoro, Marinduque, Romblon, Palawan (a region in the Philippines)
3113	MIMOSA, MIcroMeasurements Of Satellite Acceleration
3114	MIMPT, Member of the Institute of Maxillofacial Prosthetists and Technologists
3115	MIP- Multilateral Interoperability Programme,Multiple Identity Poster
3116	MIPC, Military Industrial Pharmaceutical Complex
3117	MIRA, MILAN Infra-Red Acquisition (thermal sight)
3118	MIRV, Multiple Independent Reentry Vehicle
3119	MIS- Management Information Systems,Museum Information System
3120	MISREP, Mission Report
3121	MISSI, Multilevel Information System Security Initiative
3122	MIT- Massachusetts Institute of Technology,methylisothiazoline,Milli Istihbarad Teskilati (Intelligence service of Turkey)
3123	MITL, Man-In-The-Loop
3124	MITS,see entry
3125	mJ, Millijoule
3126	MJ- Megajoule, Michael Jordan
3127	MJD, Modified Julian Day
3128	MJP, Military Judgement Panel
3129	mk, Macedonian language (ISO 639-1 code)
3130	mK, Millikelvin
3131	MK- Air Mauritius (IATA code),Macedonia (ISO 3166 digram; FIPS 10-4 country code), Mandalskameratene (Norwegian football club), Megakelvin, Milton Keynes,Missionary Kids,Mortal Kombat (1992 video game),Mortal Kombat (2011 video game)
3132	mkd, Macedonian language (ISO 639-2 code)
3133	MKD- Macedonian denar (ISO 4217 currency code),Republic of Macedonia (ISO 3166 trigram)
3134	MKG, Michael Kidd-Gilchrist (American basketball player)
3135	MKS- Metre-Kilogram-Second (system of units), MKS Inc. software company
3136	MKSA, Metre-Kilogram-Second-Ampere (system of units)
3137	MKT- Missouri-Kansas-Texas Railroad (1865-1989),Mortal Kombat Trilogy,ML[edit]
3138	ml, Malayalam language (ISO 639-1 code)
3139	mL, Millilitre
3140	ML- Mali (FIPS 10-4 country code; ISO 3166 digram), Maximum Likelihood, Megalitre
3141	MLA- Martial Law Administration of Bangladesh,Master of Landscape Architecture,Medical Library Association,Member of Legislative Assembly,Modern Language Association,Mutual legal assistance treaty,Myelosis Leucemica Acuta
3142	MLB, Major League Baseball
3143	MLC, Member of the Legislative Council (in India)
3144	MLE, Maximum likelihood estimation
3145	mlg, Malagasy language (ISO 639-2 code)
3146	MLHW, Mean Lower High Water (nautical charts)
3147	MLI, Mali (ISO 3166 trigram)
3148	MLK, Martin Luther King, Jr.
3149	MLL, Major League Lacrosse
3150	MLLW, Mean Lower Low Water (nautical charts)
3151	MLP,My Little Pony
3152	MLRS, Multiple-Launch Rocket System
3153	MLS- Major League Soccer,Multiple Listing Service
3154	MLSE- Maple Leaf Sports & Entertainment (owner of several Toronto-based sports teams),Maximum likelihood sequence estimation
3155	MLSR, Missing, Lost or Stolen Report
3156	mlt, Maltese language (ISO 639-2 code)
3157	MLT, Malta (ISO 3166 trigram)
3158	MLVW, Medium Logistics Vehicle, Wheeled
3159	MLW, Mean Low Water (nautical charts)
3160	MLWN, Mean Low Water Neaps (nautical charts)
3161	MLWS, Mean Low Water Springs (nautical charts)
3162	mm, Millimetre
3163	Mm, Megametre
3164	MM, Military Medal, Myanmar (ISO 3166 digram),Two Thousand (in Roman numerals)
3165	MMA, Mixed martial arts,Moving Mechanical Assembly
3166	MMC, Machinist's Mate, Chief (USN rating), Materiel Management Centre
3167	MMCM, Machinist's Mate, Master Chief (USN rating), Magnetic Mine Counter Measure
3168	MMCS, Machinist's Mate, Senior Chief (USN rating)
3169	MMEV, Multi-Mission Effects Vehicle
3170	MMI, Man-Machine Interface
3171	MMI, McLean Meditation Institute
3172	MMIC, Mindfulness & Meditation Instructor, Certified
3173	MMIC, McLean Meditation Institute Certified
3174	MMI, Magical MonkeyZ Inc.
3175	MMK, Burmese kyat (ISO 4217 currency code)
3176	MMO, Massively Multiplayer Online (computer game)
3177	MMOR, Master of Management in Operations Research
3178	MMORPG, Massively multiplayer online role-playing game
3179	MMPR,Mighty Morphin Power Rangers
3180	MMR, Measles, Mumps and Rubella vaccine, Myanmar (ISO 3166 trigram)
3181	MMS, Multimission Modular Spacecraft
3182	MMU, Manchester Metropolitan University, Manned Manoeuvring Unit
3183	mn, Mongolian language (ISO 639-1 code)
3184	mN, Millinewton
3185	Mn, Manganese
3186	MN, Meganewton,Minnesota (postal symbol),Monaco (FIPS 10-4 country code),Mongolia (ISO 3166 digram)
3187	MNB, Multinational Brigade
3188	MND, Motor Neurone Disease, Multinational Division
3189	MNE, Montenegro (ISO 3166 trigram)
3190	MNG, Multiple-image Network Graphics, Mongolia (ISO 3166 trigram)
3191	MNMF, Multi-National Maritime Force
3192	MNP, Northern Mariana Islands (ISO 3166 trigram)
3193	MNS, Mission Needs Statement
3194	MNT, Molecular nanotechnology, Mongolian tugrik (ISO 4217 currency code)
3195	mo, Moldovan language (ISO 639-1 code)
3196	Mo, Molybdenum
3197	MOA,Museum of Art (Brigham Young University)
3198	MOAB, Massive Ordnance Air Blast (official),Mother Of All Bombs (slang)
3199	MOB, Man Over Board,Marching Owl Band,Movable Object Block
3200	MOC, Macedonian Orthodox Church,Measure Of Capability,Mission Operations Centre,My Own Creation (Lego)
3201	MOCAS, Mechanization Of Contract Administration Services
3202	MoD, Ministry of Defence (United Kingdom) and various other countries
3203	MOD, Magneto-optical disc,Masters of Deception,Minimum Object Distance,Multiple Organ Dysfunction
3204	modem, Modulator-Demodulator
3205	ModSAF, Modular Semi-Automated Forces (military simulation)
3206	Moe, Marvel of entertainment
3207	MOE, Measure Of Effectiveness
3208	MOF,(a/i) Ministry of Finance (Japan)
3209	MOFA,(a/i) Ministry of Foreign Affairs (Japan)
3210	MOH,(a/i) Medal of Honor,Music On Hold
3211	MOID, Minimum Orbital Intersection Distance
3212	MOJWA, Movement for Oneness and Jihad in West Africa
3213	mol, Moldovan language (ISO 639-2 code),mole (unit)
3214	MOLO, Mobile Other Licensed Operator (UK)
3215	MoM, Multiple of the median
3216	MOM, Message Oriented Middleware
3217	MOM, Master's Degree in Oriental medicine
3218	MoMA, Museum of Modern Art (NYC)
3219	mon, Mongolian language (ISO 639-2 code)
3220	MOND, Modified Newtonian Dynamics
3221	MOO, Measure Of Outcome
3222	MOP, Macau pataca (ISO 4217 currency code), Measure Of Performance
3223	MOPE, Ministry of Population and Environment (Nepal),Most Oppressed People Ever (politics)
3224	MOPP,(i/a) Mission-Oriented Protective Posture
3225	MORP, Meteorite Observation and Recovery Project
3226	MORS, Military Operations Research Society
3227	MOS, Military Occupational Specialty, Mit Out Sound / Motor Only Sync, Mobile Object System,Model Output Statistics,Multiplayer Online Services, Mean Opinion Score
3228	MOSFET, Metal-Oxide-Semiconductor Field-Effect Transistor
3229	MOSS, MObile Submarine Simulator, Moving Object Support System
3230	MOT, Ministry of Transport (UK)
3231	MOTA, Member of the Orthodontic Technicians Association
3232	MOTESS, Moving Object and Transient Event Search System
3233	MOTO, Mail Order / Telephone Order,Master of the obvious
3234	MOU, Memorandum Of Understanding
3235	MOUT, Military Operations in Urban[ized] Terrain
3236	MOVES, Modeling, Virtual Environments, and Simulation Institute
3237	MOW, Maintenance of way (also MW)
3238	MOZ, Mozambique (ISO 3166 trigram)
3239	MP, Magic points, Mauritius (FIPS 10-4 country code), Member of Parliament,Military Police,Missouri Pacific, Northern Mariana Islands (postal symbol; ISO 3166 digram)
3240	mPa, Millipascal
3241	MPa, Megapascal
3242	MPA, Maritime Patrol Aircraft,Master of Public Administration
3243	MPAA, Motion Picture Association of America
3244	MPC, Minor Planet Center,Minor Planet Circular
3245	MPC, Military Payment Certificate
3246	MPEC, Minor Planet Electronic Circular
3247	MPEG, Motion Pictures (Coding) Experts Group
3248	MPEV, Multi-Purpose Engineering Vehicle
3249	MPF, Maritime Prepositioning Force
3250	MPFC, Medial PreFrontal Cortex
3251	MPG, Miles Per Gallon
3252	MPMC, Medial PreMotor Cortex
3253	MPSI, Member of the Pharmaceutical Society of Ireland
3254	MPSoC, MultiProcessor System-on-Chip
3255	MPSRON, Maritime Propositioning Ship Squadron
3256	MQ, Martinique (ISO 3166 digram),Midway Islands (FIPS 10-4 territory code)
3257	mr, Marathi language (ISO 639-1 code)
3258	MR, Mauritania (FIPS 10-4 country code; ISO 3166 digram)
3259	MRAV, Multi-Role Armoured Vehicle
3260	MRBM, Medium Range Ballistic Missile
3261	MRC, Maintenance Requirements Card
3262	MRD, Motorized Rifle Division
3263	MRE, Meal y to Eat (U.S. military rations)
3264	MRGW, Medium-Range Guided Weapon
3265	mri, Māori language (ISO 639-2 code)
3266	MRI, Magnetic Resonance Imaging
3267	MRL, Multiple Rocket Launcher
3268	MRO- Maintenance, Repair and Operating,Mars Reconnaissance Orbiter, Mauritanian ouguiya (ISO 4217 currency code)
3269	MRPharmS, Member of the Royal Pharmaceutical Society (Great Britain)
3270	MRR- Maximum Rock and Roll,Minimum-Risk Route,My Restaurant Rules
3271	MRS, Magnetic Resonance Spectroscopy
3272	MRSA, Methicillin-resistant Staphylococcus aureus
3273	MRT- Mass Rapid Transit — used as either an official or unofficial name for metro systems in Singapore, Kaoshiung, Bangkok, Taipei, Chennai, and Delhi, Mauritania (ISO 3166 trigram)
3274	MRTFB, U.S. Major Range and Test Facility Base
3275	ms- Malay language (ISO 639-1 code),Millisecond
3276	mS, Millisiemens
3277	Ms, Megasecond
3278	msa, Malay language (ISO 639-2 code)
3279	MSB- Main Support Battalion,Most Significant Bit (or Byte)
3280	MSD, Minimum Safe Distance
3281	MSDB, Multi Source Data Base
3282	MSDE- Maryland State Department of Education, Microsoft Data[base] Engine,Microsoft SQL Server 2000 Desktop Engine, Military Scenario Development Environment,Mission Simulation Dynamic Engine
3283	MSDL, Military Scenario Definition Language
3284	MSE, Multiple Subscriber Element
3285	MSG- MonoSodium Glutamate,Madison Square Garden (either the 1879, 1890, 1925, or current versions of the venue)
3286	MSH- Medium Support Helicopter,Mount Saint Helens
3287	MSI- Micro-Star International, Multispectral imagery
3288	MSIE- Microsoft Internet Explorer,Master of Science in Industrial Engineering
3289	MSL- Mars Science Laboratory,Mean Sea Level, Missile
3290	MSLP, Mean Sea Level Pressure
3291	MSM- Mainstream media, Men who have sex with men,Mount St Mary's School
3292	MSN- Microsoft Network,Master of Science in Nursing
3293	MSNBC, Microsoft National Broadcasting Company Cable news channel (see also msnbc.com)
3294	MSO, Multiple System Operator
3295	MSPA- Migrant and Seasonal worker Protection Act, MS Paint Adventures
3296	MSPB, Merit Systems Protection Board
3297	MSR- Main Supply Route,Module Service Record, Montserrat (ISO 3166 trigram), Motor Schlepp Regulung,Mountain Safety Research (outdoor supplies manufacturer)
3298	MSSA, Methicillin-susceptible Staphylococcus aureus
3299	MST- Madison Symmetric Torus,Mountain Standard Time (UTC-7 hours),MST3K or MST3k, Mystery Science Theater 3000
3300	MSU- Michigan State University,Montana State University,Mountain State University,Lomonosov Moscow State University (Russia, a.k.a. MGU),MT[edit]
3301	mt, Maltese language (ISO 639-1 code)
3302	mT, Millitesla
3303	Mt, Meitnerium
3304	MT- Malta (FIPS 10-4 country code; ISO 3166 digram),Megatesla,Montana (postal symbol), Motor Transport (military)
3305	MTA- Metropolitan Transportation Authority (Boston) (now Massachusetts Bay Transportation Authority),Metropolitan Transportation Authority (New York)
3306	MTBF, Mean time between failures
3307	MtF, Male-to-female transsexual
3308	MTF- Magnetized target fusion,Medical Treatment Facility,Message Text Format,Modulation transfer function (optics)
3309	MTG, Magic: The Gathering
3310	MTL- Maltese lira (ISO 4217 currency code), Mean Tide Level (nautical charts)* MTM, Methods-Time Measurement
3311	MTP- Maritime Tactical Publication,Materiel Transfer Plan,Mission Training Plan
3312	MTQ, Martinique (ISO 3166 trigram)
3313	MTR- Main and Tail Rotor (helicopter type),Mass Transit Railway (Hong Kong metro system),Military-Technological Revolution
3314	MTS- Maintenance Training System,Manitoba Telecom Services,Michigan Terminal/Timesharing System,Movement Tracking System,Multichannel television sound,Multi-Technical Services
3315	MTT, Methylthiazol tetrazolium (assay)
3316	MTV- MainosTeleVisio (Finnish commercial TV company),Music TeleVision
3317	MTVL, Mobile Tracked Vehicle, Light
3318	MTWS, MAGTF Tactical Warfare System
3319	MU, Mauritius (ISO 3166 digram),Oman (FIPS 10-4 country code; from Muscat)
3320	MUA, Meritorious Unit Award,Military Utility Assessment
3321	MUR, Mauritius rupee (ISO 4217 currency code)
3322	MUS, Mauritius (ISO 3166 trigram)
3323	mV, Millivolt
3324	MV, Maldives (FIPS 10-4 country code; ISO 3166 digram),Megavolt, Motor Vehicle,Motor Vessel
3325	MVC, Missouri Valley Conference
3326	MVFC, Missouri Valley Football Conference
3327	MVNO, Mobile virtual network operator
3328	MVR, Maldivian rufiyaa (ISO 4217 currency code)
3329	mW, Milliwatt
3330	MW- Maintenance of way (also MOW), Malawi (ISO 3166 digram), Medium Wave (radio), Megawatt, Mountain West (Conference) (formal initialism since July 2011)
3331	MWESH, Machismo Wizards Extended SHelter (operating system)
3332	MWI, Malawi (ISO 3166 trigram)
3333	MWK, Malawian kwacha (ISO 4217 currency code)
3334	MWOA, Mount Wilson Observatory Association
3335	MWR, Morale, Welfare, and Recreation
3336	MWTB, Mounted Warfare Test Bed
3337	MX, Mail Exchange, Mexico (FIPS 10-4 country code; ISO 3166 digram), Missile eXperimental
3338	MXN, Mexican peso (ISO 4217 currency code)
3339	my, Burmese language (ISO 639-1 code)
3340	MY, Malaysia (FIPS 10-4 country code; ISO 3166 digram)
3341	mya, Burmese language (ISO 639-2 code), million years ago
3342	MYOB, Mind Your Own Business
3343	MYR, Malaysian ringgit (ISO 4217 currency code)
3344	MYS, Malaysia (ISO 3166 trigram)
3345	MYT, Mayotte (ISO 3166 trigram)
3346	MZ, Mach-Zehnder (interferometer), Magnetic Azimuth, Move, Zig (Zero Wing), Mozambique (FIPS 10-4 country code; ISO 3166 digram)
3347	MZN, Mozambique metical (ISO 4217 currency code)
3348	n, Nano
3349	N, Newton,Nitrogen,North
3350	N3F, National Fantasy Fan Federation
3351	na, Nauruan language (ISO 639-1 code)
3352	nA, Nanoampere
3353	Na, Sodium (Latin Natrium)
3354	NA, Namibia (ISO 3166 digram), Narcotics Anonymous, National Archives,Negative Acknowledge
3355	NAA, N-Acetylaspartate
3356	NAAD, North American Air Defense
3357	NAAFI, Navy, Army and Air Force Institute (UK), No Ambition And Fuckall Interest (RSA army slang)
3358	NAAK, Mark I NAAK, Nerve Agent Antidote Kit
3359	NAAQS, National Ambient Air Quality Standards
3360	NAAWS, NATO Anti-Air Warfare System
3361	NAC,(i/a) National Agency Check,U.S. Naval Avionics Center,U.S. Navy Advanced Concepts,North Atlantic Council,Northern Area Command
3362	NACA, (U.S.) National Advisory Committee for Aeronautics (1915-1958, became NASA)
3363	NACC, North Atlantic Cooperation Council
3364	NACISA, NATO Communications and Information Systems Agency
3365	NACMA, NATO Air Command and Control System Management Agency
3366	NACRA, North America Caribbean Rugby Association (more specifically rugby union)
3367	NAD, Namibian dollar (ISO 4217 currency code)
3368	NAEC, U.S. Naval Air Engineering Center
3369	NAF, NATO Architecture Framework, Naval Air Facility
3370	NAFLD, NonAlcoholic Fatty Liver Disease
3371	NAFO, Northwest Atlantic Fisheries Organization
3372	NAFERA, Native American Free Exercise of Religion Act
3373	NAFTA, North American Free Trade Agreement
3374	NAGPRA, Native American Graves Protection and Repatriation Act
3375	NAI, Named Area of Interest, Network Access Identifier
3376	NAICS, North American Industry Classification System
3377	NAIL, Neurotics Anonymous
3378	NAILS, National Airspace Integrated Logistics System
3379	NAIRU, Non Accelerating Inflation Rate of Unemployment
3380	NAK, Negative Acknowledge
3381	NAM, Namibia (ISO 3166 trigram)
3382	NAMBLA, North American Man-Boy Love Association
3383	NAMRL, Naval Aerospace Medical Research Laboratory
3384	NaN, Not A Number (computing)
3385	NAO, UK National Audit Office
3386	NAPS, Navy Acquisition Procedures Supplement
3387	NARA, (U.S.) National Archives and Records Administration
3388	NARAL, National Abortion Rights Action League
3389	NARDAC, Naval Regional Data Automation Center
3390	NARDIC, U.S. Navy Acquisition Research and Development Information Center
3391	NARPV, National Association for Remotely Piloted Vehicles
3392	NAS, National Academy of Sciences,National Air Space,National Audubon Society,Naval Air Station,New Attack Submarine
3393	NASA, National Aeronautics and Space Administration
3394	NASCAR, National Association for Stock Car Auto Racing
3395	NASDAQ, National Association of Securities Dealers Automated Quotations
3396	NASED, National Association of State Election Directors [1][2]
3397	NASH, Non-Alcoholic Steatohepatitis
3398	NASP, National Aerospace Plane
3399	NASS, National Association of Secretaries of State [3]
3400	NatGeo, National Geographic
3401	NATO, National Association of Theatre Owners,North Atlantic Treaty Organisation
3402	nau, Nauruan language (ISO 639-2 code)
3403	NaUKMA, National University of Kyiv-Mohyla Academy
3404	nav, Navajo language (ISO 639-2 code)
3405	NAV, Navigation[al]
3406	NAVCAMS, Naval Communications Area Master Station
3407	NAVCC, National Audio-Visual Conservation Center
3408	NAVCENT, Naval Forces U.S. Central Command
3409	NAVDAC, Naval Data Automation Command
3410	NAVEUR, Naval Forces U.S. European Command
3411	NAVFE, U.S. Naval Forces, Far East
3412	NAVFOR, Naval Force
3413	NAVMACS, Naval Modular Automatic Communication Subsystem
3414	NAVNET, Navy Network
3415	NAVS, Non-Cooperative Airborne Vector Scoring
3416	NAVSAT, Navigation Satellite
3417	NAVSPACECOM, U.S. Navy Space Command
3418	NAVSPASUR, U.S. Naval Space Surveillance System
3419	NAVSTAR, Navigation Satellite Timing And Ranging
3420	NAVTACNET, Navy Tactical Network
3421	NAWC, U.S. Naval Air Warfare Center
3422	nb, Norwegian Bokmål language (ISO 639-1 code)
3423	Nb, Niobium
3424	NBA, National Basketball Association
3425	NBC, National Broadcasting Corporation,Nuclear, Biological, and Chemical
3426	NBCRS, NBC (Nuclear, Biological, and Chemical) Reconnaissance System
3427	NBIC, Nanotechnology, Biotechnology, Information Technology, Cognitive Science
3428	nbl, Southern Ndebele language (ISO 639-2 code)
3429	NBL, National Basketball League (Australia)
3430	NBT, Nitroblue tetrazolium (assay)
3431	nC, Nanocoulomb
3432	NC- Network Computer, New Caledonia (ISO 3166 digram), Node Centre,Non-Consensual,Normally Closed, North Carolina (postal symbol)
3433	NCA, National Command Authority
3434	NCAR, U.S. National Center for Atmospheric Research
3435	NCB, National Codification Bureau
3436	NCCAM, U.S. National Center for Complementary and Alternative Medicine
3437	NCCUSL, National Conference of Commissioners on Uniform State Laws (U.S.)
3438	NCDDR, U.S. National Center for the Dissemination of Disability Research
3439	NCES- U.S. National Center for Education Statistics,Net-Centric Enterprise Services
3440	NCI, U.S. National Cancer Institute
3441	NCIS- National Criminal Intelligence Service (British),Naval Criminal Investigative Service (U.S. Navy; see also NCIS, a U.S. TV series based on this unit)
3442	NCL, New Caledonia (ISO 3166 trigram)
3443	NCLR, National Council of La Raza
3444	NCMO, No Commitment Make Out
3445	NCND- Non Circumvention & Non Disclosure, Neither Confirm Nor Deny, New Concept New Design
3446	NCO, Non-Commissioned Officer
3447	NCP, Net Contracted Purchases
3448	NCR, National Cash Register Co.
3449	NCTR, Non-Co-operative Target Recognition
3450	NCW, Network Centric Warfare
3451	nd, Northern Ndebele language (ISO 639-1 code)
3452	Nd, Neodymium
3453	ND- Non-Disclosure, North Dakota (postal symbol)
3454	NDAA, U.S. National Defense Authorization Act
3455	NDBP, Non-Departmental Public Body (Scotland)
3456	NDCC, New Directions Counseling Center (Concord, California)
3457	nde, Northern Ndebele language (ISO 639-2 code)
3458	ndo, Ndonga language (ISO 639-2 code)
3459	NDP, New Democratic Party (Canada)
3460	NDS,Nintendo DS
3461	NDU, National Defense University (Washington, DC)
3462	ne, Nepali language (ISO 639-1 code)
3463	Ne, Neon
3464	NE- Nebraska (postal symbol),Niger (ISO 3166 digram), North-East
3465	NEA- National Education Association (U.S. labor union),Near-Earth Asteroid,Nuclear Energy Agency (OECD)
3466	NEAT-Near-Earth Asteroid Tracking,,National Emergency Access Target (Au Health)
3467	NED, Netherlands (IOC and FIFA trigram, but not ISO 3166)
3468	NECTEC, National Electronics and Computer Technology Center (Thailand)
3469	NEI, National Eye Institute,Not Enough Information,Nuclear Energy Institute
3470	NEMS, National Energy Modeling System (USDOE-EIA)
3471	NEO- Near-Earth Object,Non-combatant Evacuation Operations
3472	nep, Nepali language (ISO 639-2 code)
3473	NEPA, National Environmental Policy Act
3474	NER, Niger (ISO 3166 trigram)
3475	NERICA, New Rice for Africa
3476	NESDIS, National Environmental Satellite, Data and Information Service
3477	NESP, NSA/CSS Enterprise Standards Program
3478	NET, National Educational Television
3479	NETCU, (UK) National Extremism Tactical Co-ordination Unit
3480	NETL, (US) National Energy Technology Laboratory
3481	NETWARS, Network Warfare Simulation
3482	NEWS- Navy Electronic Warfare Simulator,North, East, West, South
3483	NEX, Navy EXchange
3484	nF, Nanofarad
3485	NF, Norfolk Island (ISO 3166 digram)
3486	NFA- (U.S.) National Firearms Act (often used to refer to the guns and accessories regulated under this law),No-Fire Area
3487	NFC- National Football Conference,Near field communication
3488	NFER, National Foundation for Educational Research
3489	NFG, No Fucking Good
3490	NFHS, National Federation of State High School Associations
3491	NFI, Not F****** Interested
3492	NFK, Norfolk Island (ISO 3166 trigram)
3493	NFL- National Football League,No-Fire Line
3494	Nfld, Newfoundland
3495	NFPA, National Fluid Power Association (United States)
3496	NFT, No Further Text
3497	ng, Nanogram,Ndonga language (ISO 639-1 code)
3498	NG- Natural Gas,Next Generation, Niger (FIPS 10-4 country code),Nigeria (ISO 3166 digram)
3499	NGA- National Geospatial-Intelligence Agency, Nigeria (ISO 3166 trigram)
3500	NGH,Northern General Hospital
3501	NGATS, New Generation Army Targetry System
3502	NGN, Nigerian naira (ISO 4217 currency code)
3503	NGO, non-governmental organization
3504	NGR, Nigeria (IOC trigram, but not ISO 3166 or FIFA)
3505	NGS, Naval Gunfire Support
3506	nH, Nanohenry
3507	NH, New Hampshire (postal symbol),New Hebrides (ISO 3166 digram; obsolete 1980),Vanuatu (FIPS 10-4 country code; from New Hebrides)
3508	NHANES, National Health and Nutrition Examination Survey
3509	NHB, New Hebrides (ISO 3166 trigram; obsolete 1980)
3510	NHB, No Holds Barred radio (Link)
3511	NHL, National Hockey League
3512	NHO, Næringslivets Hovedorganisasjon (Confederation of Norwegian Enterprises, a Norwegian employers' organisation)
3513	NHRA, National Hot Rod Association
3514	NHS, National Health Service (UK)
3515	Ni, Nickel
3516	NI- Nicaragua (ISO 3166 digram),Nigeria (FIPS 10-4 country code)
3517	NIAAA, U.S. National Institute on Alcohol Abuse and Alcoholism
3518	NIAID, National Institute of Allergies and Infectious Disease
3519	NIAG, NATO Industrial Advisory Group
3520	NIAMD, National Institute of Arthritis and Musculoskeletal Diseases
3521	NIB, New In Box (Internet auction/trading listings)
3522	NIBP, Non-invasive blood pressure monitor
3523	NIC- Network Interface Card, Nicaragua (ISO 3166 trigram)
3524	NicA, Nicotine Anonymous
3525	NICAP, National Investigations Committee on Aerial Phenomena
3526	NICE, UK. National Institute for Health and Clinical Excellence
3527	NICHD,National Institute of Child Health and Human Development [4]
3528	NICP, National Inventory Control Point
3529	NIDDK, National Institute of Diabetes and Digestive and Kidney Diseases
3530	NIDRR, National Institute on Disability Research and Rehabilitation
3531	NIEHS, National Institute of Environmental Health Sciences
3532	NIG, Niger (IOC and FIFA trigram, but not ISO 3166)
3533	NIH- National Institutes of Health,Not Invented Here
3534	NIIN, National Item Identification Number
3535	NIMA, National Imagery and Mapping Agency (became NGA)
3536	NIMBY, Not In My Back Yard (See NOME)
3537	NIMG, Not In My Generation
3538	NIMH- National Institute of Medical Herbalists,National Institute of Mental Health
3539	NIN, Nine Inch Nails (band)
3540	NIO, Nicaraguayan cordoba oro (ISO 4217 currency code)
3541	NIPR, National Institute of Polar Research (Japan)
3542	NIR, Northern Ireland (FIFA trigram; not eligible for an ISO 3166 or IOC trigram)
3543	NISAC, U.S. National Infrastructure Simulation and Analysis Center
3544	NISCAP, NSA Information System Certification and Accreditation Program
3545	NISER, National Institute of Science Education and Research
3546	NIST,(a/i) National Institute of Standards and Technology
3547	NIT- National Invitation Tournament (U.S. college basketball), National Institutes of Technology (India)
3548	NITFS, National Imagery Transmission Format Standard
3549	NIU, Niue (ISO 3166 trigram)
3550	nJ, Nanojoule
3551	NJ, New Jersey (postal symbol)
3552	NJHS, National Junior Honor Society
3553	NJPW, New Japan Pro Wrestling
3554	nK, Nanokelvin
3555	NKA,No Known Allergies
3556	nl, Dutch language (ISO 639-1 code)
3557	nL, Nanolitre
3558	NL- Netherlands (ISO 3166 and FIPS 10-4 country code digram),Newfoundland and Labrador (postal symbol)
3559	NLB, Non-Linear Battlefield
3560	nld, Dutch language (ISO 639-2 code)
3561	NLD, Netherlands (ISO 3166 trigram)
3562	NLF, National Liberation Front (disambiguation)
3563	NLL, National Lacrosse League
3564	NLP- Natural Language Processing,Neuro-Linguistic Programming (pseudoscience)
3565	NLW, Non-Lethal Weapon
3566	nm, Nanometre
3567	NM, New Mexico (postal symbol)
3568	NMCI, Navy Marine Corps Intranet
3569	NMCS, Not Mission Capable Supply (SM&R code)
3570	NMD, U.S. National Missile Defense
3571	NMN, No middle name
3572	NMSG, NATO Modelling and Simulation Group
3573	NMR, Nuclear Magnetic Resonance
3574	NMHNFG, Not Made Here, No Fucking Good
3575	nn, Norwegian Nynorsk language (ISO 639-1 code)
3576	nN, Nanonewton
3577	NNE, North North-East
3578	nno, Norwegian Nynorsk language (ISO 639-2 code)
3579	NNSA, U.S. National Nuclear Security Administration
3580	NNW, North North-West
3581	no, Norwegian language (ISO 639-1 code)
3582	No, Nobelium
3583	NO- Nitric Oxide, Normally Open, Norway (ISO 3166 and FIPS 10-4 country code digram)
3584	NOAA, U.S. National Oceanic and Atmospheric Administration
3585	NOAF, Norwegian Air Force
3586	NOAO, National Optical Astronomy Observatory
3587	nob, Norwegian Bokmål language (ISO 639-2 code)
3588	NOC, UK. National Oceanography Centre
3589	NODEF, NATO Oceanographic Data Exchange Format
3590	NOK, Norwegian krone (ISO 4217 currency code)
3591	NOLA, New Orleans, Louisiana (LA is the official postal code for Louisiana)
3592	NOGI, New Orleans Grande Isle (award for diving)
3593	NOLF, Navy OutLying Field
3594	NOME,Not on Mars Either
3595	NoMBO, Non-mine, Mine-like Bottom Object
3596	NOME,Not on Mars Either (see NIMBY)
3597	NOPA, National Office Products Alliance,National Office Products Association
3598	nor, Norwegian language (ISO 639-2 code)
3599	NOR, Norway (ISO 3166 trigram)
3600	NORAD, North American Aerospace Defense Command
3601	NORCECA, North, Central America and Caribbean Volleyball Confederation
3602	NORELPREF,No religious preference
3603	NORTHAG, Northern Army Group
3604	NOS- Network Operating System,New Old Stock (Internet auction/trading listings),Nitric Oxide Synthase (enzyme)
3605	NOSA, NATO OSI Security Architecture
3606	NOTAFLOF, No One Turned Away For Lack Of Funds
3607	NOTAM, Notice to Airmen
3608	NOW, National Organization for Women
3609	Np, Neap tide (nautical charts), Neptunium
3610	NP, National Permit,A permit in India for trucks so they can go anywhere in the nation
3611	NP, Nepal (ISO 3166 and FIPS 10-4 country code digram)
3612	NPB, Nippon Professional Baseball
3613	NPC, National Postgraduate Committee,National Provincial Championship (New Zealand rugby competition, now defunct),Navigation Planning Chart,Non-Player Character (role-playing games)
3614	NPCS, Non-Passenger Coaching stock (in Railways)
3615	NPD, Nationaldemokratische Partei Deutschlands (German)
3616	NPDI, New Product Development and Introduction
3617	NPG, Needline/Network Participation Group
3618	NPH, Normal Pressure Hydrocephalus
3619	NPL, National Priorities List, Nepal (ISO 3166 trigram)
3620	NPOV, Neutral Point Of View
3621	NPR, National Public Radio, Nepalese rupee (ISO 4217 currency code)
3622	NQ, Dronning Maud Land (ISO 3166 digram; obsolete 1983)
3623	NQOCD, Not Quite Our Class, Dear (or Darling). (Upper-class English slang)
3624	NPO,nothing by mouth
3625	nr, Southern Ndebele language (ISO 639-1 code)
3626	NR, Nauru (ISO 3166 and FIPS 10-4 country code digram)
3627	NRA, National Rifle Association
3628	NRAO, National Radio Astronomy Observatory
3629	NRC, National Research Council (U.S.),Nuclear Regulatory Commission (U.S.)
3630	NRDC, (U.S.) Natural Resources Defense Council
3631	NREL, U.S. National Renewable Energy Laboratory
3632	NRK, Norsk Rikskringkasting (Norwegian Broadcasting Corporation)
3633	NRMP, National Resident Matching Program (U.S. medicine)
3634	NRO, U.S. National Reconnaissance Office
3635	NRT, Near Real Time
3636	NRTA, National Rat Terrier Association,National Retail Tenants Association,National Retired Teachers Association,Northwest Regional Transmission Association
3637	NRU, Nauru (ISO 3166 trigram)
3638	ns, Nanosecond
3639	nS, Nanosiemens
3640	NS- Norfolk Southern Railway (AAR reporting mark),Nova Scotia (postal symbol),Suriname (FIPS 10-4 country code)
3641	NSA- U.S. National Security Agency,Naval Support Activity,No Strings Attached
3642	NSABB, National Science Advisory Board for Biosecurity
3643	NSAID, Non-Steroidal Anti-Inflammatory Drug
3644	NSB, Norges Statsbaner (Norwegian State Railways)
3645	NSC,National Security Council
3646	NSDL, National Science Digital Library (US)
3647	NSG, National System for Geospatial-Intelligence
3648	NSN, National Stock Number
3649	NSNA, National Student Nurses' Association
3650	NSO, National Standardization Office (ABCA)
3651	NSS, (U.S.) Naval Simulation System
3652	NST, (UK) Nimrod Software Team
3653	NSTAC, National Security Telecommunications Advisory Committee
3654	NSW, New South Wales (postal symbol)
3655	nT, Nanotesla
3656	NT- National Trust (UK), Saudi-Iraqi neutral zone (ISO 3166 digram; obsolete 1993), New Technology (Windows NT), Northern Territory (Australia) (postal symbol),Northwest Territories (Canada) (postal symbol)
3657	NTC- National Training Center,Negative Temperature Coefficient (thermistor)
3658	NTDS, Naval Tactical Data System
3659	NTP, Network Time Protocol
3660	NTR, Network Time Reference
3661	NTRA, National Thoroughbred Racing Association
3662	NTSB, National Transportation Safety Board
3663	NTSC, National Television Standards Committee (colloquially, Never Twice the Same Color)
3664	NTV, Non-Tactical Vehicle
3665	NTY, (Internet Abbreviations:) Not Tested Yet; (Alternatively) No Thank You
3666	NTZ, Iraq-Saudi Arabia Neutral Zone (ISO 3166 trigram; obsolete 1993)
3667	NU- Nicaragua (FIPS 10-4 country code),Niue (ISO 3166 digram),Nunavut (postal symbol)
3668	NUL- Null character (ASCII code of control character),National Urban League
3669	NUTS, Nuclear Utilization Target Selection
3670	NUWC, U.S. Naval Undersea Warfare Center
3671	nv, Navajo language (ISO 639-1 code)
3672	nV, Nanovolt
3673	NVEOL, Night Vision and Electro-Optics Laboratory
3674	NVESD, CERDEC Night Vision and Electronic Sensors Directorate, Fort Belvoir, Virginia
3675	NVG, Night Vision Goggles
3676	NVL, Night Vision Laboratory
3677	nW, Nanowatt
3678	NW, North-West
3679	NW, Nuclear Weapon
3680	NWA, National Wrestling Alliance
3681	NWF, National Wildlife Federation
3682	NWFZ, Nuclear-Weapon-Free Zone
3683	NWHN, U.S. National Women's Health Network
3684	nWo, New World Order (see article for explanation of idiosyncratic capitalization)
3685	NWOAHM, New Wave of American Heavy Metal
3686	NWOBHM, New Wave of British Heavy Metal (sometimes pronounced /n.ˈwɒbm/ as if it were an acronym)
3687	NWRA, National Wildlife Rehabilitators Association
3688	NWSL, National Women's Soccer League (U.S.)
3689	NWT, North-West Territories
3690	NXA, 21st arcade game in the Pump It Up series
3691	NXD, Native XML
3692	NXE, New Xbox Experience
3693	NXG, New Cross Gate station
3694	NXL, National XBall League
3695	NXN, Nike Cross Nationals
3696	ny, Chichewa language (ISO 639-1 code)
3697	NY, New York (postal symbol)
3698	nya, Chichewa language (ISO 639-2 code)
3699	NYHA, New York Heart Association
3700	NYO, National Youth Orchestra of Great Britain
3701	NYRA, National Youth Rights Association, New York Racing Association (horse racing)
3702	NYSE, New York Stock Exchange
3703	NZ, New Zealand (ISO 3166 and FIPS 10-4 country code digram)
3704	NZC, New Zealand Cricket
3705	NZD, New Zealand dollar (ISO 4217 currency code)
3706	NZL, New Zealand (ISO 3166 trigram)
3707	NzL,Noze looan (online/event listings)
3708	NZOSS, New Zealand Open Source Society
3709	NZRU, New Zealand Rugby Union
3710	O, Oberst,Observer,Obstacle,Octal,Officer,Official,Oh,Operational,Operator,Oprah (magazine),Outstanding, Oxygen
3711	OA, Operational Analysis, Overeaters Anonymous
3712	OAC, On Approved Credit
3713	OAP,Old Age Pensioner (UK)
3714	OAS, Organization of American States
3715	OARSI, Osteoarthritis Research Society International
3716	OASIS, Objects and Agents for Information Systems and Simulation,Organization for the Advancement of Structured Information Standards
3717	OASIS, Ontario Agencies Supporting Individuals with Special Needs
3718	OASIS, Ontario Association of Sewage Industry Services
3719	OASP, Operational Analysis Support Paper/Plan
3720	OAU, Organization for African Unity
3721	OB, Obedience,Obligation,Obligatory,Obsolete,Obstetrics, Ocean Beach (California),Off Break (cricket),Old Bryanstonian,Order of Battle,Outlet Box (electrical), Overbought (stock market), Oversight Board
3722	OBE, Officer of the Order of the British Empire
3723	OBJ, Objective (military parlance)
3724	OBS, Observation/Observer,Obsolete,Obstacle, Off Balance Sheet,Optical Burst Switching (IEEE),Organic Brain Syndrome,Organization(al) Breakdown Structure
3725	OBSS, Off Board Sensor Systems,Ordo Byantinus Sancti Sepulchri (Byzantine Order of the Holy Sepulchre),Orbiter Boom Sensor System (space shuttle),Origins Billion Star Survey
3726	OBX, Outer Banks (North Carolina)
3727	oc, Occitan language (ISO 639-1 code)
3728	OC, Officer Commanding
3729	OCA, Observatoire de la Côte d'Azur,Offensive Counter-Air
3730	OCD, Obsessive-Compulsive Disorder
3731	OCFS, Oracle Cluster File System
3732	OCFS2, Oracle Cluster File System Release 2
3733	oci, Occitan language (ISO 639-2 code)
3734	OCIDS, Optical Combat Identification System
3735	OCMCC, [2] Orchard County MCC
3736	OCN, Oncology Certified Nurse
3737	OCO, Oort Cloud Object
3738	OCOKA, Observation, Cover and concealment, Obstacles, Key terrain, and Avenues of approach (mnemonic)
3739	OCR, Optical Character Recognition
3740	OCS,see entry
3741	OD- Old Dragon,Ordnance Datum (nautical charts), Overdose
3742	ODAS, OCA-DLR Asteroid Survey
3743	ODB- Ol' Dirty Bastard (rapper), One Dirty B*tch/Broad/Babe (professional wrestler), Operational Data Base, Original David Baker (professional poker player; used to distinguish from another professional poker player of the same name), Oxford Dictionary of Byzantium
3744	ODBC, Open DataBase Connectivity
3745	ODI- Office for Disability Issues (UK government agency),One Day International (cricket),Open Data-Link Interface,Oracle Data Integrator,Overseas Development Institute (UK think tank),OE[edit]
3746	OEA, (U.S.) Office of Economic Adjustment
3747	OED, Oxford English Dictionary
3748	OECD, Organisation for Economic Co-operation and Development (international)
3749	OEG, Operation Exposure Guidance
3750	OEIS, On-Line Encyclopedia of Integer Sequences
3751	OEM, Original Equipment Manufacturer
3752	OFA, Occipital Face Area
3753	OFDA, U.S Agency for International Development's Office of Foreign Disaster Assistance
3754	OGC, Open Geospatial Consortium
3755	OGD, Other Government Department
3756	OGO, Other Government Organization
3757	OGX,OUARGLA,a petroleum state in the south of Algeria
3758	OH, Ohio (postal symbol)
3759	OHC, OverHead-Cam engine
3760	OHHLA, Original Hip-Hop Lyrics Archive
3761	OHIP, Ontario Health Insurance Plan
3762	OHMS, On Her (or His) Majesty's Service (also written: O.H.M.S.)
3763	OHP, Observatoire de Haute-Provence
3764	OHSS, Ovarian Hyperstimulation Syndrome
3765	OIC, Officer In Charge
3766	OIF, Operation Iraqi Freedom
3767	OIOC, Oriental & India Office Collections (in the British Library)
3768	oj, Anishinaabe language (Ojibwa) (ISO 639-1 code)
3769	OJ, Orange Juice,O.J. Simpson
3770	oji, Anishinaabe language (Ojibwa) (ISO 639-2 code)
3771	OJT,On-the-Job Training
3772	OKC, Oklahoma City
3773	OLED, Organic Light-Emitting Diode
3774	OLS, Operational Linescan System
3775	om, Oromo language (ISO 639-1 code)
3776	OM, Oman (ISO 3166 digram),Olympique de Marseille (French football club)
3777	OMA, Open Mobile Alliance,Operations & Maintenance, Army
3778	OMB, U.S. Office of Management and Budget,Ontario Municipal Board, Order of Mapungubwe in Bronze
3779	OMD, Orchestral Manoeuvres in the Dark (1980s pop group)
3780	OME, Osaka Mercantile Exchange
3781	OMFG, Oh My Fucking God
3782	OMG, Oh My God or Or My Gosh
3783	OMN, Oman (ISO 3166 trigram)
3784	OMNCS, U.S. Office of the Manager for the National Communications System
3785	OMP, Order of Mapungubwe in Platinum
3786	OMR, Omani rial (ISO 4217 currency code)
3787	OMS, Order of Mapungubwe in Silver
3788	OMT, Object Model Template
3789	OMW, On My Way, Oh My Word
3790	ON, Ontario (postal symbol)
3791	Onna,Oniong, Nnung Ndem, and Awa, a Local Government Area in Nigeria
3792	ONC, Orthopaedic Nurse Certified
3793	ONG, Orthodontic National Group
3794	ONI, (U.S.) Office of Naval Intelligence
3795	ONS, Operational Needs Statement
3796	OO, Object Oriented,Over & Out
3797	OOO, Out Of the Office
3798	OOAD, Object Oriented Analysis and Design
3799	OOBE, Out-of-body experience
3800	OOCL, Orient Overseas Container Line
3801	OODA, Observation, Orientation, Decision, Action loop (a.k.a. Boyd's Loop)
3802	OOMF, One Of My Followers
3803	OOP, Object-Oriented Programming,Out Of Print
3804	OOS, Occupational Overuse Syndrome,OneSAF Objective System,Open Operating System,Out Of Service
3805	OOTW, Operations Other Than War
3806	OP- Observation Point/Post,Ocean Pacific (surfwear and swimwear brand),Original Poster (internet),Order Point, in inventory management; the inventory state at which more items should be ordered. Often expressed as a part of OP/OQ (when quantity OP is reached, order OQ new items),Overpowered, often used to refer to fictional characters (e.g. Superman) or game mechanics (e.g. the Black Lotus in Magic: the Gathering) that are considered disproportionately strong
3807	OPA, Other Procurement, Army
3808	OPAC, Online Public Access Catalogue
3809	OPCON, Operational control
3810	OPCW, Organisation for the Prohibition of Chemical Weapons
3811	OPEC, Organization of the Petroleum Exporting Countries
3812	OPFOR, Opposing force
3813	OPI- Office of Primary Interest,Open Prepress Interface
3814	OPINTEL, Operational Intelligence
3815	OPLAN, Operation plan (also OpPlan)
3816	OPORD, Operation order
3817	OPP- Ontario Provincial Police,Operational Planning Process,Other People's Property/Pussy/Penis (song)
3818	OPS- On-base plus slugging (baseball statistics), Operations
3819	OPSEC- Operations security,Open Platform for Security
3820	OPSI- Overwhelming post splenectomy infection,UK Office of Public Sector Information
3821	OPTAR, Operational target
3822	OPV, Offshore Patrol Vessel
3823	OQ, Order Quantity, in inventory management; the quantity of new items to be ordered. Often expressed as a part of OP/OQ (when quantity OP is reached, order OQ new items)
3824	or, Oriya language (ISO 639-1 code)
3825	OR, Operating Room (surgery),Operational/Operations Research, Oregon (postal symbol),overreciprocation,when the leader of an inner circle friendship contacts a friend more than is wanted or reasonable
3826	ORAU,(a/i) Oak Ridge Associated Universities
3827	ORB,(a/i) Object Request Broker
3828	ORBAT, Order of Battle
3829	ORD, O'Hare International Airport in Chicago, Illinois (IATA Airport Code ORD)
3830	ORD, Office of Research and Development,Operational Requirements Document
3831	ORF, Operational iness Float
3832	ori, Oriya language (ISO 639-2 code)
3833	ORISE, Oak Ridge Institute for Science and Education
3834	orm, Oromo language (ISO 639-2 code)
3835	ORNL, Oak Ridge National Laboratory
3836	ORR, Oak Ridge Reservation (U.S. DOE),Office of Rail Regulation (UK government),Office of Refugee Resettlement,(CIA) Office of Research and Reports,Operational iness Rate,Operational iness Review
3837	ORSA,Oxacillin-resistant Staphylococcus aureus,Operations Research Society of America
3838	OS, Operating System
3839	os, Ossetic language (ISO 639-1 code)
3840	Os, Osmium
3841	OSA, Order of St. Augustine
3842	OSCE, Organisation for Security and Cooperation in Europe
3843	OSD, U.S. Office of the Secretary of Defense, On-screen Display
3844	OSDL, Open Source Development Labs
3845	OSE, Own Separate Entrance
3846	OSERS, U.S. Department of Education Office of Special Education and Rehabilitative Services
3847	OSETI, Optical SETI also Optical SETI
3848	OSHA, Occupational Safety and Health Administration
3849	OSI, Office of Strategic Influence,Ontario Swine Improvement,Open Source Initiative,Open Systems Interconnection
3850	OSIA, (U.S.) On-Site Inspection Agency
3851	OSL, Open Source License,Optically Stimulated Luminescence,Orbiting Solar Laboratory
3852	OSIRIS- Optical, Spectroscopic, and Infrared Remote Imaging System (astronomical system on the Rosetta spacecraft),Optical System for Imaging and low Resolution Integrated Spectroscopy (astronomical system on the land-based Gran Telescopio Canarias)
3853	OSM, One Saturday Morning
3854	OSOTPBOIAS, One Sec, On The Phone, Be Off In A Sec
3855	OSPA, Operations Security Professional's Association site of OSPA
3856	OSPA, Oregon School Psychologists Association [3]
3857	OSRH, Oružane Snage Republike Hrvatske (en: Armed forces of the Republic of Croatia)
3858	oss, Ossetic language (ISO 639-2 code)
3859	OSS, Office of Strategic Services (1942-1945, forerunner of CIA)
3860	OSU, Ohio State University,Oklahoma State University
3861	OTA, Office of Technology Assessment,(a/i) Orthodontic Technicians Association
3862	OTAC, Orthodontic Technicians Association Conference, Orthodontic Technicians Association Council
3863	OTB, Off The Ball, Offtrack Betting, OneSAF Testbed (a descendant of ModSAF)
3864	OTC, Over-The-Counter (drugs)
3865	OTD, Off the derech (referring to an Orthodox Jew who has stopped practicing the tenets of his or her faith)
3866	OTEA, (U.S. Army) Operational Test Evaluation Agency
3867	OTI, Office of Transition Initiatives (United States Agency for International Development)
3868	OTOH, On The Other Hand
3869	OTS,Off the scale, sexually untouchable except for a lot of money.
3870	OTSBH, Over The Shoulder Boulder Holder
3871	OTW, On The Way
3872	OTYBL, Over To You Blue Leader
3873	OTYRL, Over To You Red Leader
3874	OU, University of Oklahoma
3875	OVC, Overcast (METAR Code), Ohio Valley Conference
3876	OVV, Optically Visually Violent, or Optically Violently Variable,a type of quasar
3877	OW, Old Wykehamist
3878	OWN, Oprah Winfrey Network
3879	OX, IATA code for Orient Thai Airlines
3880	OXC, Optical cross-connect
3881	OXF, IATA code for London Oxford Airport
3882	OXM, Official Xbox Magazine
3883	OXR, IATA code for Oxnard Airport
3884	OXT, Oxytocin
3885	OZ,(?) Australia
3886	p, pico
3887	P, Peta,Phosphorus
3888	P2P, Peer-to-peer (networking)
3889	pa, Punjabi language (ISO 639-1 code)
3890	pA, picoampere
3891	Pa- pascal,Protactinium
3892	PA-(a/i) Pamela Anderson, Panama (ISO 3166 digram),Paraguay (FIPS 10-4 country code), Partial Agonist, Pennsylvania (postal symbol),petampere, PolyAmide (Nylon),Prince Albert piercing,Public Address (vocal amplification system),Public Affairs,PA 6, Nylon 6 (PolyAmide) (similarly for PA 11, 12, 46, 66, 610)
3893	PAA, Position Area for Artillery
3894	PAB, Panamanian balboa (ISO 4217 currency code)
3895	PABX, Private Automated Branch eXchange (company phone system)
3896	PAC- Pan Africanist Congress, Partial Solar Calibrator,Patriot Advanced Capabilities,Political action committee,(a/i) Primary Auditory Cortex
3897	PACOM, (U.S.) Pacific Command
3898	PADD- Personal Access Display Device (as seen in the Star Trek franchise),Petroleum Administration for Defense Districts, used for data collection in the U.S. petroleum industry
3899	PADI, Professional Association of Diving Instructors
3900	PAEK, PolyArylEtherKetone
3901	PAFC, Plymouth Argyle Football Club
3902	PAH, Polycyclic aromatic hydrocarbon
3903	PAHO, Pan American Health Organization
3904	PAI- PolyAmide Imide,Pre-Approval Inspection (pharma)
3905	PAK, Pakistan (ISO 3166 trigram)
3906	Pakistan, Punjab, Afghan states, Kashmir, sIndh, baluchiSTAN
3907	PAL- Phase Alternating Line (TV standard), Philippine Airlines
3908	PAM,(a/i) Precision Attack Missile
3909	Pamida, Patrick, Michael, and David, sons of the department store chain's co-founder Jim Witherspoon
3910	PAMELA- Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics, Pedestrian Accessibility and Movement Environment Laboratory
3911	pan, Punjabi language (ISO 639-2 code)
3912	PANS, Pretty Advanced/Awesome Network Services (cf. POTS)
3913	PAPI, Precision Approach Path Indicator (aviation)
3914	PAR, Paraguay (IOC and FIFA trigram, but not ISO 3166)
3915	PARC, Palo Alto Research Center
3916	PAROS, Prevention of an Arms Race in Outer Space (treaty)
3917	PARP, (NATO Partnership for Peace) Planning And Review Process
3918	PARWIG, Power Augmented Ram Wing In Ground (aeroplane wing shape)
3919	PAS,See entry
3920	PASA, PolyAmide, Semi-Aromatic (Nylon)
3921	PASGT, Personnel Armor System, Ground Troops
3922	PASR, Personnel Accounting and Strength Reporting
3923	PATH, Port Authority Trans-Hudson
3924	PAWS- Phased Array Warning System,Progressive Animal Welfare Society
3925	PAYD, Pay As You Drive
3926	PAYE, Pay As You Earn
3927	Pb, Lead (Latin Plumbum)
3928	PB, PolyButylene
3929	PBA- Philippine Basketball Association,Professional Bowlers Association
3930	PBB, PolyBrominated Biphenyl
3931	PBCK, Problem Between Chair and Keyboard (computer help desk in-joke)
3932	PBD, PolyButaDiene
3933	PBDE, PolyBrominated Diphenyl Ether
3934	PBI, PolyBenzImidazole
3935	PBN, PolyButylene Naphthalate
3936	PBOH, Please Become Old History
3937	PBR- Pabst Blue Ribbon (beer brand),Professional Bull Riders
3938	PBS- Pharmaceutical Benefits Scheme (Australia),Public Broadcasting Service (U.S.),Public Broadcasting Services (Malta)
3939	PBRT,may stand for: Physically Based Raytracing, an open source software rendering system for physically correct image synthesis.
3940	PBT, PolyButylene Terephthalate
3941	PBX, Private Branch eXchange (company phone system)
3942	pC, picocoulomb
3943	PCAS, Planet-Crossing Asteroid Survey
3944	PCB,see entry
3945	PCC- NATO Partnership Coordination Cell,Posterior Cingulate Cortex,Pre-Command Course,Presidents Conference Committee
3946	PCCB, Porsche Ceramic Composite Brake
3947	PCCIP, President's Commission on Critical Infrastructure Protection
3948	PCE, PerChlorEthylene
3949	PCI- U.S. Pacific Islands Trust Territory (ISO 3166 trigram; obsolete 1986), Peripheral Component Interconnect (computer bus)
3950	PCIe, Peripheral Component Interconnect Express (computer bus)
3951	PCL, Passive Coherent Location
3952	PCMCIA, Personal Computer Memory Card International Association (People Can't Memorise Computer-Industry Acronyms)
3953	PCN, Pitcairn Islands (ISO 3166 trigram)
3954	PCP- phencyclidine,Pneumocystis jiroveci pneumonia (formerly Pneumocystis carinii), Probabilistically Checkable Proof
3955	PCPI,Physician Consortium for Performance Improvement (AMA)
3956	PCR, Polymerase chain reaction
3957	PCSSD, Pulaski County Special School District
3958	PCT- Pacific Crest Trail,Patent Cooperation Treaty
3959	PCTE- Portable Common Tool Environment, Punjab College of Technical Education
3960	PCZ, Panama Canal Zone (ISO 3166 trigram; obsolete 1980)
3961	Pd, Palladium
3962	PD, per diem (Latin: (calculated) by the day),Point of Departure,Police Department,Postal District,Potential Difference,Principal Deputy,Public Domain,Privatdozent
3963	PD, Product Director—Example: CERDEC Product Director C4ISR and Network Modernization
3964	PDA, Personal Digital Assistant,Predicted Drift Angle,Public Display of Affection,Push-Down Automaton
3965	PDD, Past Due Date,Presidential Decision Directive
3966	PDF, Panama[nian] Defense Forces (abolished 1990),Portable Document Format,Principal Direction of Fire
3967	PDG, President Director General,Product Development Group
3968	PDL, Pure Dumb Luck (Texan punk band)
3969	PDN, Pull-Down Network
3970	PDP, Programmable Data Processor,Performance Development Plan
3971	PDQ, Pre-Defined Queries (Siebel packages),Pretty Damn Quick
3972	PDRY, People's Democratic Republic of Yemen (obsolete since 1990)
3973	PDT, Pacific Daylight [Saving] Time (UTC-7 hours)
3974	PDU, Police Dog Unit,Power Distribution Unit,Protocol Data Unit
3975	PE,Professional Engineer
3976	PE, Ice Pellets (old style METAR Code),Peru (ISO 3166 and FIPS 10-4 country code digram), Physical Education,Premature Ejaculation, Prince Edward Island (postal code),Price to Earning ratio (used for equity shares),Plant Extract
3977	PEBCAC, Problem Exists Between Chair and Computer (IT help desk in-joke)
3978	PEBKAC, Problem Exists Between Keyboard and Chair (ditto)
3979	PEEK, PolyEtherEtherKetone
3980	PEET, Partnerships for Enhancing Expertise in Taxonomy
3981	PEI, Prince Edward Island,PolyEtherImide
3982	PEK, PolyEtherKetone
3983	PEN- Peruvian sol (ISO 4217 currency code), Poets, Essayists and Novelists, the original meaning of the initialism of the organization now known as PEN International,PolyEthylene Naphthalate
3984	PEPFAR, President's Emergency Plan For AIDS Relief
3985	PER, Peru (ISO 3166 trigram)
3986	perl, usually lower case Practical Extraction and Report Language
3987	PES, PolyEtherSulfone
3988	PEST, UK Public Engagement with Science and Technology
3989	PET,(a/i) Personal Electronic Transactor,Pierre Elliott Trudeau,Positron Emission Tomography (as in PET scan),PolyEthylene Terephthalate (plastic), Preliminary English Test
3990	PETA,(a/i) pentaerythritol triacrylate,People Eating Tasty Animals,People for the Ethical Treatment of Animals
3991	PETE, PolyEthyleneTErephthalate
3992	PETP, PolyEthyleneTerePhthalate
3993	pF, picofarad
3994	PF- French Polynesia (ISO 3166 digram),petafarad, Phenol Formaldehyde (resin),Power forward, a player position in Australian rules football, basketball, and ice hockey
3995	PFD, Permanent Fund Dividend = personal flotation device
3996	PFE, Permanent Forest Estate
3997	PFO, Pissed, Fell Over (medical diagnosis in-joke)
3998	PfP, Partnership for Peace
3999	pg, picogram
4000	Pg, petagram
4001	PG -
4002	PGCE, Postgraduate Certificate in Education
4003	PGD, Pre-implantation Genetic Diagnosis
4004	PGENI, Pharmaco-Genetics for Every Nation Initiative
4005	PGH, Pre-implantation Genetic Haplotyping
4006	PGK, Papua New Guinea kina (ISO 4217 currency code)
4007	PGM, Precision-Guided Munition
4008	PGP, Pretty Good Privacy
4009	pH, parts of hydrogen (acidity/alkalinity index),picohenry
4010	PH, Passive Homing (missile guidance system), petahenry,Philippines (ISO 3166 digram), Probability of Hit,Public Health,Purple Heart
4011	PHA, PolyHydroxyAlkanoate, Potentially Hazardous Asteroid
4012	PHL, Philippines (ISO 3166 trigram)
4013	PHQ,Patient Health Questionnaire
4014	PHP, Philippine peso (ISO 4217 currency code), PHP: Hypertext Preprocessor (originally Personal Home Page (Tools))
4015	pi, Pāli language (ISO 639-1 code)
4016	Pi, Pebi
4017	PI, PolyImide,PolyIsoprene,Private Investigator
4018	PIB, PolyIsoButylene
4019	PIC, Person In Charge
4020	PICNIC, Problem In Chair Not In Computer
4021	PICS, Private Investment Capital Subscription
4022	PID, Pelvic Inflammatory Disease, Plan Identification Number,Positive Identification,Procedural Identification, Procurement Identification Description
4023	PIF,(a/i) Partners in Flight
4024	PIG, Pipeline Inspection Gauge
4025	PIM,(a/i) Parameterized Ionospheric Model,Path of Intended Motion,Pediatric Index of Mortality,Personal Information Manager/Management,Presence and Interworking Mobility,Processor-In-Memory,Program Integration Manager,Protocol Independent Multicast
4026	PIN, Personal Identification Number
4027	PINF, People In Need Foundation (Czech charitable organisation)
4028	PIPA,(a/i) Program on International Policy Attitudes
4029	PIR, Priority Intelligence Requirement
4030	PIRA, Provisional Irish Republican Army
4031	PIREPS, Pilot Reports
4032	PITA, Pain In The Ass
4033	pJ, picojoule
4034	PJ, petajoule
4035	PJHQ, Permanent Joint Headquarters
4036	K, picokelvin
4037	PKA, Previously Known As,Professionally Known As
4038	PKE, Partnership of Kindermusik Educators [1] &[2] & [2]
4039	PKI, Public Key Infrastructure (cryptography)
4040	PKR, Pakistani rupee (ISO 4217 currency code)
4041	PKU, Phenylketonuria
4042	pl, Polish language (ISO 639-1 code)
4043	pL, picolitre
4044	PL, Ice Pellets (new style METAR Code), petalitre, Phase Line (Co-ordination Line), Poland (ISO 3166 and FIPS 10-4 country code digram)
4045	PLAF,(a/i) People's Liberation Armed Forces,Pluggable look and feel,Product Line Architecture Framework
4046	PLAID, Precision Location and Identification
4047	PLB, Personal Locator Beacon
4048	PLC, Public Limited Company (British)
4049	PLCC, Plastic Leaded Chip Carrier (electronics)
4050	PLD, Probable Line of Deployment
4051	PLEBS, People Lacking Everyday Basic Skills
4052	PLF, Parachute Landing Fall
4053	pli, Pāli language (ISO 639-2 code)
4054	PLI, Position Location Information,Private Lands Initiative,Professional Liability Insurance
4055	PLIF, Planar Laser-Induced Fluorescence
4056	PLL, Phase-Locked Loop (electronics)
4057	PLM, Polarized Light Microscope/Microscopy
4058	PLMBA, Phospholipid Bilayer Microarray
4059	Pln, Platoon
4060	PLN, Polish zloty (ISO 4217 currency code)
4061	PLO, Palestine Liberation Organization
4062	PLOKTA, Press Lots Of Keys To Abort
4063	PLP, Platonic Life Partner
4064	PLS, Palletized Loading System,Personal Locator System
4065	PLUTO, Pipe Line Under The Ocean
4066	PLW, Palau (ISO 3166 trigram)
4067	pm, picometre
4068	Pm, petametre,Promethium
4069	PMC, Primary Motor Cortex
4070	PMCS, Partial Mission Capable Supply (SM&R code),Power Management Control System,Professional Military Comptroller School
4071	PME, Professional Military Education
4072	PMI, Positive Material Identification
4073	PMID, PubMed Identifier
4074	PMMA, PolyMethylMethAcrylate
4075	PMS, Premenstrual Syndrome
4076	PMSC, NATO Political-Military Steering Committee on Partnership for Peace
4077	PMSL, Piss Myself Laughing (Internet shorthand)
4078	PMT,Premenstrual Tension (UK) (see Premenstrual Syndrome)
4079	pN, piconewton
4080	PN- petanewton,Pitcairn Islands (ISO 3166 diagram)
4081	PNAC, Project for the New American Century
4082	PNC- Palestinian National Council,Palmerston North City (cf. PNC, a New Zealand rapper from this city),Pittsburgh National Corporation, one of the two companies that merged into today's PNC Financial Services,Provident National Corporation, the other company that merged into PNC Financial Services
4083	PNF, Pilot Not Flying (aviation)
4084	PNG- Papua New Guinea (ISO 3166 trigram), Portable Network Graphics
4085	PNP- Partido Nuevo Progresista,Plug 'N' Play/Pray,Positive Negative Positive
4086	PNS, Pensacola, Florida (IATA airport code)
4087	PNVS, Pilot Night Vision Sensor
4088	Po, Polonium
4089	PO, Post Office
4090	PO, Purchase Order
4091	POCD, Post-Operative Cognitive Dysfunction
4092	pod, Plain Old Documentation
4093	POD- Payable on Death (banking term, and the full name of American metal band P.O.D.),Point of divergence (alternate or counterfactual history),Port of Debarkation
4094	POE, Perl Object Environment,(b) Port Of Embarkation (c) Polyol Ester (d) Power Over Ethernet
4095	POETS, Portable Occultation, Eclipse, and Transit electronic-camera System
4096	POFF, Plain Old Flat File
4097	POG, Passionfruit, Orange and Guava
4098	POGO, Project On Government Oversight
4099	POI, Program Of Instruction
4100	POK,(a/i) Plane Of Knowledge
4101	pol, Polish language (ISO 639-2 code)
4102	POL- Petroleum, Oils and Lubricants, Poland (ISO 3166 trigram)
4103	POLAD, Political Advice
4104	POM- Program Objective Memorandum,PolyOxyMethylene
4105	POMDP, Partially observable Markov decision process
4106	POP-(a/i) Point of Presence,Post Office Protocol,Progesterone Only Pill
4107	por, Portuguese language (ISO 639-2 code)
4108	POR- Portugal (FIFA and IOC trigram, but not ISO 3166), Proposed Operational Requirement
4109	POS-(a/i) Point Of Sale terminal (retail industry transaction computers), Piece Of S**t
4110	POSH, Port Outbound Starboard Home (alleged)
4111	POSSLQ,Person of the Opposite Sex Sharing Living Quarters
4112	POT,(a/i) Plane Of Tranquility
4113	POTS- Plain Old Telephone Service (cf. PANS),Postural Orthostatic Tachycardia Syndrome
4114	POV, Point of view
4115	POW, Prisoner of war
4116	PPA- Parahippocampal Place Area,PolyPhthalAmide
4117	PPASC, (U.S.) Plans and Program Analysis Support Center
4118	PPCLI, Princess Patricia's Canadian Light Infantry (regiment)
4119	PPG- Pittsburgh Plate Glass (the original name of the company now known as PPG Industries),The Powerpuff Girls
4120	PPLI, Precise Participant Location & Identification
4121	ppm, Parts Per Million
4122	PPM, Parts Per Million
4123	PPM, Project Planning and Management
4124	PPO, PolyPhenylene Oxide
4125	PPP- Point-to-Point Protocol,Purchasing Power Parity
4126	PPQ, Pulses Per Quarter (used in music programming, sequencers)
4127	PPQN, Pulses Per Quarter Note (ditto)
4128	PPQT, Pre-Production Qualification Test
4129	PPS- post postscriptum,Precise/Precision Positioning Service (GPS),PolyPhenylene Sulfide
4130	PPV, Pay-per-view
4131	PQ- Province of Québec (obsolete postal code, replaced by QC), Parti Québécois,PR[edit]
4132	Pr, Pastor or Priest
4133	Pr, Praseodymium
4134	PR- Public Relations, Puerto Rico (postal symbol; ISO 3166 digram)
4135	Prb, Presbyter
4136	PRBO, Point Reyes Bird Observatory
4137	PRC, People's Republic of China
4138	PRD, CERDEC Product Realization Directorate
4139	PRFG, Partial Fog (METAR Code)
4140	PRI, Puerto Rico (ISO 3166 trigram)
4141	PRK, Democratic People's Republic of Korea (ISO 3166 trigram)
4142	PRM, Personnel iness Management
4143	PRT- Portugal (ISO 3166 trigram), Provincial Reconstruction Team
4144	PRY, Paraguay (ISO 3166 trigram)
4145	ps- Pashto language (ISO 639-1 code),picosecond
4146	pS, picosiemens
4147	Ps, petasecond
4148	PooS,Poo Sniffer (Internet shorthand)
4149	PSA- Paralysis Society of America,Pharmaceutical Society of Australia,Pressure-Sensitive Adhesive,Production Services Association,Prostate Specific Antigen,Public Service Announcement,Public Service Association
4150	PSC- Personal service corporation,Primary Somatosensory Cortex
4151	PSE, Palestinian Territory, Occupied (ISO 3166 trigram)
4152	PSG, Pacific Seabird Group
4153	PSI, Pounds per square inch
4154	PSI,(a/i) Portable Source Initiative
4155	PSO- Peace Support Operations,Primary Standardisation Office (ABCA),Protocol Supporting Organization (of the ICANN)
4156	PSS, Personnel System Support
4157	PST, Pacific Standard Time (UTC-8 hours)
4158	PSU, Pennsylvania State University
4159	PsyOp, Psychological Operations
4160	pt, Portuguese language (ISO 639-1 code)
4161	pT, picotesla
4162	Pt, Platinum
4163	PT, petatesla, Physical Training (in the Army), Portugal (ISO 3166 digram)
4164	PTA, Parent-Teacher Association
4165	PTAL, Public Transport Accessibility Level
4166	PTAN -
4167	PTES, People's Trust for Endangered Species
4168	PTFE, PolyTetraFluoroEthylene
4169	PTI, Pardon the Interruption
4170	PTL, Patrol, Primary Target Line
4171	PTO, Patent and Trademark Office,Please Turn Over
4172	PTSD, Post-Traumatic Stress Disorder
4173	Pu, Plutonium
4174	PU- Guinea-Bissau (FIPS 10-4 country code), Polyurethane, United States Miscellaneous Pacific Islands (ISO 3166 digram; obsolete 1986)
4175	Pub, Publication
4176	PUG,(a/i) PET Users Group
4177	PUN,(a/i) Pull-Up Network
4178	PUP,(a/i) Pull-Up Point
4179	PUR, Puerto Rico (IOC and FIFA trigram, but not ISO 3166)
4180	pus, Pashto language (ISO 639-2 code)
4181	PUS, United States Miscellaneous Pacific Islands (ISO 3166 trigram; obsolete 1986)
4182	pV, picovolt
4183	PV, petavolt
4184	PVC, Permanent Virtual Circuit,PolyVinyl Chloride,Premature Ventricular Contraction,Primary Visual Cortex
4185	PvE, Player versus Environment
4186	PvP, Player versus Player
4187	PVR, Personal Video Recorder
4188	PvZ, Plants vs. Zombies
4189	pW, picowatt
4190	PW- Palau (postal symbol; ISO 3166 digram)
4191	petawatt-
4192	PWA, Pirates With Attitude
4193	PWBA, Pension and Welfare Benefits Administration
4194	PwC, PricewaterhouseCoopers (international accounting firm)
4195	PWC, PieceWise Constant (describing a mathematical function)
4196	PWL, PieceWise Linear (describing a mathematical function)
4197	PWLC, PieceWise Linear and Concave/Convex (describing a mathematical function)
4198	PWR, Pressurized Water Reactor
4199	PWV, Pretoria-Witwatersrand-Vereeniging, the original name for the South African province now known as Gauteng, and still used to refer to the metropolitan agglomeration at the core of the province
4200	PX, Post eXchange
4201	PY, Paraguay (ISO 3166 digram),Person-Year, Portsmouth yardstick
4202	PYF, French Polynesia (ISO 3166 trigram)
4203	PYG, Paraguayan guaraní (ISO 4217 currency code)
4204	PYMWYMI, Put Your Money Where Your Mouth Is
4205	PZ, Panama Canal Zone (ISO 3166 digram; obsolete 1980), Pickup Zone
4206	Q1, First Quarter
4207	Q2, Second Quarter
4208	Q3, Third Quarter
4209	Q4, Fourth Quarter
4210	QA, Qatar (FIPS 10-4 country code; ISO 3166 digram)
4211	Qantas, Queensland And Northern Territory Aerial Services
4212	QAR, Qatari rial (ISO 4217 currency code)
4213	QAT, Qatar (ISO 3166 trigram)
4214	QB, Quarterback (football)
4215	QC, Quality Control, Québec (postal symbol), Queen's Counsel
4216	QCA, Qualifications and Curriculum Authority,Quality Council of Alberta
4217	QCD, Quantum ChromoDynamics
4218	QDR, Quadrennial Defense Review
4219	QEH, Queen Elizabeth's Hospital
4220	QFE, Quoted For Emphasis, Local ground level atmospheric pressure (aeronautical Q code)
4221	QK, Air Canada Jazz (IATA airline designator)
4222	QLD, Queensland, (Australia) (postal symbol)
4223	QM, Quality Management,Quantum Mechanics,Queen Mother
4224	QNH, Regional mean sea level atmospheric pressure (aeronautical Q code)
4225	QPR, Queens Park Rangers F.C. (English football team), Quality-Price Ratio (wine evaluation term)
4226	QPS, Quark Publishing System
4227	QR, Quake Rally,Qualitative Reasoning,Queensland Rail,Queen's Rangers,Quick Release,Quiet Riot, Qatar Airways (IATA airline designator)
4228	QSCAT, Quick Scatterometer satellite
4229	QSL, Québec Sign Language
4230	QSO, Quasi-Stellar Object
4231	QT, Quentin Tarantino,QuickTime,QuikTrip,QT (cute) Software
4232	qu, Quechua language (ISO 639-1 code)
4233	Quango, (British Commonwealth) QUasi Autonomous Non-Governmental Organisation
4234	Quasar, Quasi-stellar radio source
4235	QUB,Queen's University Belfast
4236	que, Quechua language (ISO 639-2 code)
4237	QUIET, Q and U Imaging ExperimenT (Q and U are the Stokes parameters of the CMBR polarization)
4238	QZ, Awair (IATA airline designator)
4239	R, Reinforcing,Right, Röntgen, Restricted (movie rating)
4240	R2I, Resistance to Interrogation
4241	R3P, Rearm, Refuel, and Resupply Point
4242	Ra, Radium
4243	RA, Radio Australia
4244	RA, Rain (METAR Code), Rear Area,Reinforced Alert,Republican Army,Right Ascension,Royal Artillery (UK),Royal Academy
4245	RAA, Royal Automobile Association,South Australia, Rear Assembly Area
4246	RAAF, Royal Australian Air Force
4247	Rabobank, Raiffeisen-Boerenleenbank (from the two banks that merged to form the modern company)
4248	RAC, Royal Automobile Club (in the United Kingdom, renamed RAC plc in 2002)
4249	RACK, Risk Aware Consensual Kink (SM phrase)
4250	Racon, RAdar beaCON
4251	RADA, Royal Academy of Dramatic Art
4252	Radar, Radio Detection And Ranging
4253	RADB, Real America Database,Resource Assessment Database,Reunion Address DataBase,Rice Allelopathy Data Base,Routing Arbiter Database
4254	RADb, Routing Assets Data Base
4255	RadB, Rad51/Dmc1 homologous protein
4256	RADC, Region Air Defence Commander
4257	RAE, UK Royal Aircraft Establishment (-1991)
4258	RAF, Red Army Faction,Royal Air Force
4259	RAG, Raising and Giving,Rocket Antitank Grenade
4260	RAGBRAI, Register's Annual Great Bicycle Ride Across Iowa
4261	RAM,Rolling Airframe Missile,
4262	RAM,Royal Air Maroc
4263	Ramark, RAdar MARKer
4264	RAOC, Rear Area Operation Centre
4265	RAP,(a/i) Radio Access Point,Radiological Assistance Program (U.S. Department of Energy),Rear Area Protection,Recognised [Operating/Operational] Air Picture,Recurring Advance Payment,Relational Associative Processor,Reliable Acoustic Path,Rocket-Assisted Projectile,Rule Against Perpetuities
4266	RARDE, UK Royal Armament Research and Development Establishment (1962-1991)
4267	RARE, Rapid Acquisition with Relaxation Enhancement (MRI technique)
4268	RASC, Royal Army Service Corp,Former corps of British Army
4269	RATELO, Radiotelephone Operator
4270	Rb, Rubidium
4271	RB, Running Back (football)
4272	RBAR, Row By Agonizing Row,a derogatory way of describing a technique of scanning a set of records in a database to update or examine the contents of each one. This is the technique of last resort in most cases, since most database operations are optimized when using set based analysis instead of the RBAR method.
4273	RBCI, Radio Based Combat Identification
4274	RBI, Runs Batted In
4275	RC,see entry
4276	RCA- Radio Corporation of America,Root Cause Analysis,Royal Canadian Artillery,Royal City Avenue (famous entertainment zone in Thailand)
4277	RCAF, Royal Canadian Air Force
4278	RCC, Rescue Co-ordination Centre
4279	RCCO, Royal Canadian College of Organists
4280	RCHA, Royal Canadian Horse Artillery (regiment)
4281	RCMP, Royal Canadian Mounted Police
4282	RCS- Radar Cross-Section,Reaction Control System,Revision Control System
4283	RCZ, Rear Combat Zone
4284	RD,Radio Disney
4285	RDA- Research, Development, and Acquisition,Recommended Daily Allowance (Nutrition)
4286	RDD, Radiological Dispersion Device
4287	RDECOM, (U.S. Army) Research, Development and Engineering Command
4288	RDM, Remotely Delivered/Deliverable Mine
4289	RDO- Rapid, Decisive Operation,Regular Day Off,Remote Data Objects
4290	RDT, Remote Digital Terminal
4291	RDV, Remote Detection Vehicle
4292	Re, Rhenium
4293	RE, Royal Engineers
4294	REACH, Registration, Evaluation, Authorisation and Restriction of Chemical Substances
4295	REACT, Remote Electronically Activated Control Technology
4296	REAM, Retired Educators Association of Minnesota
4297	RECCE, Reconnaissance
4298	REEF, Reef Environmental Education Foundation
4299	REM,(i/a) Rapid Eye Movement (sleep phase),Rosicrucian Egyptian Museum
4300	REME, Royal Electrical and Mechanical Engineers
4301	RERC, Rehabilitation Engineering Research Center
4302	RES, Radiation Exposure Status, Reserve
4303	RESNA, Rehabilitation Engineering and Assistive Technology Society of North America
4304	REU, Réunion (ISO 3166 trigram)
4305	Rf, Rutherfordium
4306	RF, Radio Frequency,Receptive Field (neurophysiology)
4307	RFA, Restrictive Fire Area (military),Royal Field Artillery
4308	RFC, Request for Comments,Royal Flying Corps (WWI precursor to RAF)
4309	RFD, Request for Documentation
4310	RFE, Request for Evaluation
4311	RFEF, Real Federación Española de Fútbol (Spanish for Royal Spanish Football Federation)
4312	RFF, Right of First Refusal (legal term)
4313	RFI, y For Inspection,y For Issue,Request For Information,Radio Frequency Interference
4314	RFID, Radio Frequency IDentification
4315	RFL, Rugby Football League
4316	RFL, Restrictive Fire Line (military)
4317	RFP, Request for Proposal
4318	RFQ, Request for Quotation
4319	RFT, Request for Tender
4320	RFU, Rugby Football Union
4321	Rg, Roentgenium
4322	RG, Republican Guard
4323	RGB, Red Green Blue (colour model)
4324	RGBI, Red Green Blue Intensity (ditto)
4325	Rh, Rhodium
4326	RH, Southern Rhodesia (ISO 3166 digram; obsolete 1980)
4327	RHIC, Relativistic Heavy Ion Collider
4328	RHLI, Royal Hamilton Light Infantry (Canadian militia regiment)
4329	RHO, Southern Rhodesia (ISO 3166 trigram; obsolete 1980)
4330	RHS, Right Hand Side,Redland High School, Royal Horticultural Society,London
4331	RHU, Replacement Holding Unit
4332	RI, Rex et Imperator, Regina et Imperatrix King-Emperor
4333	RI, Rhode Island (postal symbol)
4334	RIAA, Recording Industry Association of America
4335	RIBA, Royal Institute of British Architects
4336	RIF- Reduction In Force (layoffs),Resistance Index for Frostbite,ing Is Fundamental
4337	RIFA, Red imported fire ant
4338	RILA, Retail Industry Leaders Association
4339	RIM- Remote integrated multiplexer, Australian term for a digital loop carrier,Research In Motion, former name of the BlackBerry company,Revolutionary Internationalist Movement (Maoist organization),Royal Indian Marine, former navy of British colonial India
4340	RIMVS, Retinal Imaging Machine Vision System
4341	RINO, Republican In Name Only[1]
4342	RISC, Reduced Instruction Set Computer
4343	RISTA, Reconnaissance, Intelligence, Surveillance, and Target Acquisition (see also ISTAR)
4344	RWH, Rain Water Harvesting
4345	RJD, Reduced Julian Day
4346	RKBA,Right to Keep and Bear Arms (Second Amendment to the United States Constitution)
4347	RKI, Robert Koch Institute, German governmental research institute in Berlin
4348	RKO, Radio-Keith-Orpheum Pictures
4349	RL, Release Line,Real Life
4350	RLP, Recognised [Operating/Operational] Land Picture
4351	RLS, Restless Leg Syndrome
4352	RLY, Rally Point
4353	RM,see separate disambiguation page
4354	rm, Raeto-Romansh language (ISO 639-1 code)
4355	RMA, Return Mailing Authorization,Revolution in Military Affairs,Rachel McAdams
4356	RMC, Robert Menzies College
4357	RMC,(ii) Royal Military College (Australia, Canada, UK)
4358	RMDA, Records Management and Declassification Agency
4359	RMP, Recognised [Operating/Operational] Maritime Picture
4360	RMS, Rate-Monotonic Scheduling,Richard M. Stallman,Root-Mean-Square,Royal Mail Ship (e.g. RMS Titanic)
4361	rn, Rundi language (Kirundi) (ISO 639-1 code)
4362	Rn, Radon
4363	RN, Radio Netherlands
4364	RN, Royal Navy,Registered Nurse (US)
4365	RNA, RiboNucleic Acid
4366	RNAD,Royal Naval Armaments Depot (UK)
4367	RNPS, Radio Network Planning System
4368	RNZ, Radio New Zealand
4369	RNZI, Radio New Zealand International
4370	ro, Romanian language (ISO 639-1 code)
4371	RO, Range Only,Red Orchestra, Romania (ISO 3166 and FIPS 10-4 country code digram)
4372	ROA,(a/i) Rate Of Ascent
4373	ROC,(i/a) Receiver Operating Characteristic (statistics),Regional Operations Centre,Republic Of China,Roc-A-Fella Records,Regional Organisations of Councils
4374	ROD,(a/i) Rate Of Descent,Record Of Decisions,Report Of Discrepancy
4375	ROE, Rules Of Engagement
4376	roh, Raeto-Romansh language (ISO 639-2 code)
4377	ROH, Ring of Honor
4378	ROI, Return On Investment, Republic of Ireland.
4379	ROFLOL, Rolling On the Floor Laughing Out Loud
4380	ROK,(a/i) Republic of Korea
4381	ROL, Romanian leu (ISO 4217 currency code)
4382	ROM, -Only Memory,Refuel On the Move,Royal Ontario Museum
4383	ron, Romanian language (ISO 639-2 code)
4384	RON, Romanian new leu (ISO 4217 currency code)
4385	ROP, Render Output Pipeline
4386	ROPE,Research Opportunity and Performance Evidence
4387	ROS, Reactive Oxygen Species
4388	ROU, Romania (ISO 3166 trigram)
4389	ROV, Remotely Operated Vehicle
4390	ROW, Right Of Way,Rest Of the World
4391	ROZ,(a/i) Restricted Operations Zone
4392	RP- Philippines (FIPS 10-4 country code), Release Point,Role-Playing [relationship potential]
4393	RPA, Regional Plan Association
4394	RPD, Recognition-Primed Decision-making
4395	RPF, Rwandan Patriotic Front
4396	RPG- (US-CA) Regional Planning Group,Report Program Generator,Rocket Projectile Gun,Rocket-Propelled Grenade,Role-Playing Game
4397	RPL, Reverse Polish Lisp
4398	rpm, revolutions per minute
4399	RPM- Records, Promotion, Music (expansion of the title of a former Canadian music magazine),Red Hat Package Manager
4400	RPN, reverse Polish notation
4401	rps, revolutions per second
4402	RPV, Remotely Piloted Vehicle
4403	RQ, Puerto Rico (FIPS 10-4 territory code)
4404	RRB, Railroad Retirement Board
4405	RRN, Recurrence Rate Number
4406	RRP, Recurrent Respiratory Papillomatosis
4407	RRS, Racing Rules of Sailing
4408	RRSP, Registered Retirement Savings Plan (Canada; roughly equivalent to the IRA in the U.S.)
4409	RS, Russia (FIPS 10-4 country code)
4410	RSA- Regimental Support Area,Republic of South Africa,Rivest-Shamir-Adleman encryption, South Africa (IOC and FIFA trigram, but not ISO 3166)
4411	RSD- Reflex Sympathetic Dystrophy, Serbian dinar (ISO 4217 currency code)
4412	RSI, Repetitive Strain Injury
4413	RSJ, Rolled Steel Joist (construction)
4414	RSN, Real Soon Now (coined by author Jerry Pournelle)
4415	RSPB, (UK) Royal Society for the Protection of Birds
4416	RSPCA, Royal Society for the Prevention of Cruelty to Animals
4417	RSR, Required Supply Rate
4418	RSRE, UK Royal Signals and Radar Establishment (1976-1991)
4419	RSRI, Red Sands Research Institute
4420	RSS, Really Simple Syndication
4421	RSTA, Reconnaissance, Surveillance, and Target Acquisition
4422	RT, Real Time,Radio Telephone, Return to duty
4423	RTA, Road traffic accident (British)
4424	RTBF, Radio-Télévision belge de la Communauté française
4425	RTCA, RTCA, Inc.
4426	RTF, Rich Text Format
4427	RTFM, the Fucking/Fine Manual
4428	RTG, Radio-isotope Thermoelectric Generator also used for Rubber Tyred Gantry crane
4429	RTGS, Royal Thai General System of Transcription,Real Time Gross Settlement
4430	RTI, Run-Time Infrastructure (Simulation)
4431	RTL,see entry
4432	RTLS, Return to Launch Site,period in NASA Space Shuttle assent profile where, during assent, shuttle aborts assent and turns and glides back to landing strip at launch site
4433	RTP, Real-time Transport Protocol
4434	RTS,see entry
4435	RTT, Round Trip Timing
4436	RTV, Rapid Terrain Visualization ACTD,Retro Television Network
4437	ru, Russian language (ISO 639-1 code)
4438	Ru, Ruthenium
4439	RU, Russia (ISO 3166 digram)
4440	RUB, Russian ruble (ISO 4217 currency code)
4441	RUC, Royal Ulster Constabulary
4442	run, Rundi language (Kirundi) (ISO 639-2 code)
4443	rus, Russian language (ISO 639-2 code)
4444	RUS, Russia (ISO 3166 trigram)
4445	RUSI, Royal United Services Institute for Defence Studies
4446	RV- Reconnaissance Vehicle,Recreational Vehicle,Re-entry Vehicle,reciprocation void
4447	rw, Rwanda language (Kinyarwanda) (ISO 639-1 code)
4448	RW, Rwanda (ISO 3166 and FIPS 10-4 country code digram)
4449	RWA, Rwanda (ISO 3166 trigram)
4450	RWADA, Resident Weighted Average Daily Attendance (New York State term used in public education to indicate the size of a school district, i.e. its number of students)
4451	RWF, Rwandan franc (ISO 4217 currency code)
4452	RWR, Radar Warning Receiver
4453	RWS, Remote Weapon Station
4454	RX, Receive
4455	SA- Sand (METAR Code),Saudi Arabia (ISO 3166 and FIPS 10-4 country code digram), Sexaholics Anonymous, sine anno (Latin, “without year”),Situational awareness,South Africa,(i/s) South Australia (postal symbol), Standards Australia,Sturmabteilung (German, “Storm Detachment”, Nazi forerunner and rival of SS),S.A.,designation for a corporation in many European countries; see article for meanings
4456	SAA- Saudi Arabian Airlines, former name of Saudia,Sex Addicts Anonymous,South African Airways,Southern Athletic Association,Standards Association of Australia, a former name of Standards Australia,SAAB — Svenska Aeroplan AB (Swedish aircraft manufacturer; also refers to its former auto manufacturing arm),SAAFR — (a/i) Standard use Army Aircraft Flight Route (“safer”),SAAMI — Sporting Arms and Ammunition Manufacturers' Institute (“sammy”),SAARC — South Asian Association for Regional Cooperation,SAB — Soprano Alto Baritone,Sabena — Société anonyme belge d'exploitation de la navigation aérienne (French for “Belgian Company for Exploiting Aerial Navigation”, 1923-2001),SABIC — Saudi Basic Industries Corporation,SABR — Society for American Baseball Research
4457	SAC- Standards Activity Committee (of SISO),U.S. Strategic Air Command (1946-1992),SACAT — Semi Attended Customer Activated Terminal (Supermarket checkout),SACEUR — Supreme Allied Commander EURope,SACLANT — Supreme Allied Commander atLANTic,SACLOS — Semi-Automatic Command to Line of Sight
4458	SAD- Safford Regional Airport (IATA code), Seasonal Affective Disorder,Situational Awareness Display,SADD — originally Students Against Drunk Driving, now Students Against Destructive Decisions (U.S. national school-related group)
4459	SADL- Situation Awareness Data Link (“saddle”),Structural Architecture Description Language
4460	SAE- Society of Automotive Engineers[1],Stamped addressed envelope,SAFER — Steel And Foam Energy Reduction,SAFICT — Software Agents as Facilitators of Interoperability in Collective Training,sag — Sango language (ISO 639-2 code),SAG — Screen Actors Guild,SAGAT — Situation Awareness Global Assessment Technique,SAGE — Semi-Automatic Ground Environment (simulation),SAHB — Sensational Alex Harvey Band,SAIC — Science Applications International Corporation
4461	SALT-(a/i) Save A Life Today (SALT) Alert; Emergency Contact System, Southern African Large Telescope,Strategic Arms Limitation s
4462	SAM- Sequential-Access Memory,Sociedad Aeronáutica de Medellín,Surface-to-Air Missile
4463	san- Sanskrit language (ISO 639-2 code), Storage Area Network
4464	SAR- Saudi riyal (ISO 4217 currency code), Search And Rescue,Special Administrative Region,Synthetic Aperture Radar
4465	SARA- Southeastern Association for Research in Astronomy,Scientific Atlanta Resident Application,Scottish Amateur Rowing Association,Southern African Railway Association,State Administration for Religious Affairs,SARP — Search And Rescue Processor,SARR — (i/a) Search And Rescue Repeater,SARS — Severe Acute Respiratory Syndrome
4466	SART- Search and Rescue Transponder,Situational Awareness Rating Technique,SARU — South African Rugby Union
4467	SAS- Scandinavian Airlines System,Second Avenue Subway,Situational Awareness System,Special Air Service,Studies, Analysis and Simulation,Side Angle Side, Statistical Analysis System (original meaning; SAS Institute Inc. has evolved far beyond that scope),SASE — Self-Addressed Stamped Envelope,SASO — Stability and Support Operations,SASOL — Suid Afrikaanse Steenkool en Oli.e. (Afrikaans, “South African Coal and Oil”)
4468	SAT- formerly Scholastic Aptitude Test and Scholastic Assessment Test; now known solely by the initials,Small Arms Trainer,SATB — Soprano Alto Tenor Bass,SATNAV — Satellite Navigation (Increasingly common GPS based system in new vehicles),SATs — Standard Assessment Tasks and other similar terms describing tests used in English schools; see National Curriculum assessment#Terminology,SAU — Saudi Arabia (ISO 3166 trigram),SAVAK — Sazamane Etelaat va Amniate Kechvar (Iranian “Security and Intelligence Service”)
4469	SAW- Squad Automatic Weapon,Surface acoustic wave,SAWE — Society of Allied Weight Engineers,SB[edit],Sb — Antimony (Latin Stibium)
4470	SB- Sexy Bitch,Sexy Bastard,Sexy Boy (disambiguation), Solomon Islands (ISO 3166 digram), Special Warfare Boat Operator
4471	SBA- Santa Barbara Airport,Simulation-Based Acquisition,Sovereign Base Area,Student bar association,SBB — German for the Swiss Federal Railways
4472	SBC- Sensotronic Brake Control,Single-Board Computer,Southern Baptist Convention,SBCCOM — U.S. Army Soldier and Biological Chemical Command (disbanded 2003),SBCS — Single-Byte Character Set,SBCT — Stryker Brigade Combat Team
4473	SBD- Solomon Islands dollar (ISO 4217 currency code),Silent But Deadly
4474	SBNO, Standing but not operating (in reference to amusement parks)
4475	SBS- Special Boat Service,Special Broadcasting Service,Seoul Broadcasting System
4476	SBW- Sonny Bill Williams (New Zealand dual-code rugby player),SC[edit],sc — Sardinian language (ISO 639-1 code),Sc — Scandium
4477	SC- Cruiser Submarine (US Navy hull classification) c Saint Kitts and Nevis (FIPS 10-4 country code; from Saint Christopher),Seychelles (ISO 3166 digram),South Carolina (postal symbol)
4478	SCO- Santa Cruz Operation (initials later used by SCO Group), Scotland (FIFA trigram; not eligible for an ISO 3166 or IOC trigram), Shanghai Cooperation Organization,SCOTUS — Supreme Court of the United States,SCR — Seychelles rupee (ISO 4217 currency code),SCRAM — Safety Control Rod Axe Man
4479	SCS- Scan Correlated Shift,Soil Conservation Service
4480	SCSI- Small Computer System Interface (“scuzzy”), Strategic and Combat Studies Institute,SCT — Scattered Sky (METAR Code),SCTP — Stream Control Transmission Protocol,Scuba — Self Contained Underwater Breathing Apparatus,SCUF — Slow Continuous Ultrafiltration,SCUFN — Sub-Committee on Undersea Feature Names (of GEBCO),SD[edit],sd — Sindhi language (ISO 639-1 code)
4481	SD- Secure Digital (memory card format),Sheriff's department,Smoke/Decontamination, South Dakota (postal symbol),Sudan (ISO 3166 digram)
4482	SDC- Shaft Driven Compressor,U.S. Army Strategic Defense Command (1985-1992),SDG — Sudanese pound (ISO 4217 currency code),SDG — Sum Dum Goy,greasy spoon chinese restaurant,SDH — Synchronous Digital Hierarchy
4483	SDHC, Secure Digital High Capacity
4484	SDXC, Secure Digital eXtended Capacity
4485	SEC- U.S. Securities and Exchange Commission, Security,Southeastern Conference,SECAM — Séquentiel couleur à mémoire (French for “Colour Sequential with Memory”; TV standard, cf. NTSC, PAL),SECDEF — (U.S.) Secretary of Defense,SED — CERDEC Software Engineering Directorate,SEDRIS — Synthetic Environment Data Representation and Interchange Specification,SEE — Small Emplacement Excavator,SEG — Society of Exploration Geophysicists,SEG — Special Escort Group,SEK — Swedish krona (ISO 4217 currency code),Selkent — South East London & Kent Bus Company,SELT — Single Ended Line Test (ing)
4486	SEM-(i/a) Sensor Employment Manager,Switch to Email Mode, i.e. stop texting as it is more disruptive by making a sound or vibrating and email instead, for a given time
4487	SEN- Senegal (ISO 3166 trigram), Small Extension Node
4488	SEP- Somebody Else’s Problem,Spherical Error Probable,System Enhancement Package,System Engineering Plan,SEPTA — Southeastern Pennsylvania Rapid-Transit Authority,SERE — Survival, Evasion, Resistance and Escape,SESSPE — Submarine Escape and Surface Survival Personnel Equipment,SET — Staphylococcal EnteroToxin,SETI — Search for ExtraTerrestrial Intelligence,SETAC — Society for Environmental Toxicology and Chemistry
4489	SEU- Single Event Upset (solid state physics),Slightly Enriched Uranium,Special Evidence Unit,SF[edit]
4490	SF- Fleet Submarine (retired US Navy hull classification), San Francisco,Science fiction, South Africa (FIPS 10-4 country code), Speculative fiction,Special Forces
4491	SFA- Sales force automation,Saturated fatty acid,Scottish Football Association,Stephen F. Austin (State University),Sudan Football Association
4492	SFE- Supercritical fluid extraction,Sydney Futures Exchange,SFF — Standard File Format,sf&f — Science fiction & fantasy,SFM — Switch to Facebook Mode, i.e. to message someone on Facebook instead of texting as it is less disruptive in the sense of the phone not making sound or vibrating, for a period of time,SFOB — Special Forces Operations Base,SFOR — UN Stabilisation Force (in Bosnia and Herzegovina),SFU — Simon Fraser University (Canada),SG[edit],sg — Sango language (ISO 639-1 code),Sg — Seaborgium
4493	SG- Senegal (FIPS 10-4 country code),Singapore (ISO 3166 digram),Snow Grains (METAR Code), Study Group
4494	SGC- Server Gated Cryptography, Stargate Command,SGD — Singapore dollar (ISO 4217 currency code),SGML — Standard Generalized Markup Language,SGP — Singapore (ISO 3166 trigram)
4495	SGS- South Georgia and the South Sandwich Islands (ISO 3166 trigram), Svalbard Ground Station (Landsat),Société Générale de Surveillance,SH[edit],sh — Serbo-Croatian language (ISO 639-1 code)
4496	SH- Saint Helena (ISO 3166 digram), SONATRACH (Algerian petroleum company)
4497	SHAC- Stop Huntingdon Animal Cruelty,Student Health Action Coalition,SHAPE — Supreme Headquarters Allied Powers Europe,SHF — Super High Frequency,SHN — Saint Helena (ISO 3166 trigram)
4498	SHO, Showtime (see also sho.com)
4499	SI- Slovenia (ISO 3166 and FIPS 10-4 country code digram), Socialist International,Sports Illustrated,Système International (French, International System of Units),SIA — Singapore Airlines (ICAO code),SIA — Survivors of Incest Anonymous,SIAM — Society for Industrial and Applied Mathematics,SIC — Standard Industrial Classification,SICS — (a/i) Swedish Institute of Computer Science,SIDS — Sudden infant death syndrome,SIDU — select, insert, delete, update. See Create, read, update and delete,SIF — Selective Identification Feature,SIFF — Successor IFF
4500	SIIT- Saskatchewan Indian Institute of Technologies (Canadian university),Sirindhorn International Institute of Technology (Thai university),Stateless IP/ICMP Translation algorithm,SIMAC — Semantic Interaction with Music Audio Contents,SIMLAS — Soldier Integrated Multipurpose Laser System,SIMM — Single In-line Memory Module,SIMNET — SIMulator NETwork, later SIMulation NETwork,SIMNET-D, SIMNET-Developmental,SIMP — Strongly Interacting Massive Particle
4501	SIMPLE- Satellite Interactive Multimedia Platform for Low-cost Earth stations, Savings Incentive Match Plan for Employees (as used in SIMPLE IRA), Standard Interface for Multiple Platform Link Evaluation (NATO STANAG 5602),sin — Sinhalese language (ISO 639-2 code),SIN — Social Insurance Number (Canada),SINCGARS — SINgle Channel Ground and Airborne Radio System
4502	SIP- Session Initiation Protocol,State Implementation Plan,System Improvement Program,Systematic Investment Plan,SIPP — Self-Invested Personal Pension
4503	Siri, Speech Interpretation and Recognition Interface (Apple iOS software)
4504	SIRI, Service Interface for Real Time Information
4505	SISO- Simulation Interoperability Standards Organization,Society of Independent Show Organizers,SIW — Simulation Interoperability Workshop,SIYSS — Stockholm International Youth Science Seminar,SJ[edit]
4506	SJ- Svalbard and Jan Mayen (ISO 3166 digram), Societas Iesu (Latin: The Society of Jesus, the Jesuit order), Statens Järnvägar (Swedish State Railways),SJA — Staff Judge Advocate (military law),SJC — Supreme Judicial Court of Massachusetts (note: the highest court in the state of Maine is also called the Supreme Judicial Court),SJM — Svalbard and Jan Mayen (ISO 3166 trigram),SK[edit],sk — Slovak language (ISO 639-1 code)
4507	SK- Saskatchewan (postal symbol),Slovakia (ISO 3166 digram),SKC — Clear Sky (METAR Code),SKK — Slovak koruna (ISO 4217 currency code),SKM — Sikkim (ISO 3166 trigram; obsolete 1975),SL[edit],sl — Slovene language (ISO 639-1 code)
4508	SL- Sierra Leone (ISO 3166 and FIPS 10-4 country code digram), Start Line
4509	SLA- Service Level Agreement,Symbionese Liberation Army,SLAA — Sex and Love Addicts Anonymous,SLAC — Stanford Linear Accelerator Center,SLAN — sine loco, anno, nomine (Latin, “without place, year, or name”),SLAPP — Strategic lawsuit against public participation,SLB — Solomon Islands (ISO 3166 trigram),SLBM — Sea/Submarine-Launched Ballistic Missile,SLC — Scan Line Corrector,SLE — Sierra Leone (ISO 3166 trigram),SLI/SLi,(i/s) Scan-Line Interleave,Scalable Link Interface,SLIT — SubLingual ImmunoTherapy,slk — Slovak language (ISO 639-2 code),SLL — Sierra Leone leone (ISO 4217 currency code),SLO — Slovenia (IOC trigram, but not FIFA or ISO 3166)
4510	SLOC- Sea Lines Of Communication,Source Lines Of Code,SLORC — State Law and Order Restoration Council (of Burma)
4511	SLP- Sea Level Pressure, Super Long Play,slph — Standard litre per hour (air flow),slpm — Standard litre per minute (air flow),slps — Standard litre per second (air flow),SLR — Single-Lens Reflex (camera)
4512	SLT- Single Lens Translucent, Speech and language therapist, Solid Logic Technology (electronics),Swing Landing Trainer (paratroops),Secondary lymphoid tissue,slv — Slovenian language (ISO 639-2 code),SLV — El Salvador (ISO 3166 trigram),SM[edit],sm — Samoan language (ISO 639-1 code),Sm — Samarium
4513	SM- Sado-Masochism, San Marino (ISO 3166 and FIPS 10-4 country code digram), Soldier's Manual, Submarine Minelayer (US Navy hull classification),SMA — Scan Mirror Assembly,SMART — Subject Matter And Requirements Team,SMASS — Small Main-Belt Asteroid Spectroscopic Survey,SMCT — Soldier's Manual of Common Tasks,SMD — Surface Mount Device,SMDR — Station Message Detail Recording,sme — Northern Sami language (ISO 639-2 code)
4514	SME- Scan Mirror Electronics,Subject Matter Expert
4515	SMG- Sequential Motorsport Gearbox,SubMachine Gun,SMH — Shaking My Head,SMil — Sadomasochisterne i landet (Danish SM organisation),SMIL — Synchronized Multimedia Integration Language,smo — Samoan language (ISO 639-2 code),SMP — Standard Military Pattern,SM&R — Source, Maintenance, and Recoverability,SMR — San Marino (ISO 3166 trigram),SMS — many, including: Short message service; see entry,SMTP — Simple Mail Transfer Protocol,SMU — Southern Methodist University
4516	SMX-many, including: Server Macro Expansion, Solaris MINIX, Spatial multiplexing, Sulfamethoxazole; see entry
4517	SMZ-many, including: Silver Mt. Zion, Sulfamethazine, Sulfamethoxazole; see entry,SN[edit],sn — Shona language (ISO 639-1 code),Sn — Tin (Latin Stannum)
4518	SN- Senegal (ISO 3166 digram),Singapore (FIPS 10-4 country code),Snow (METAR Code),SuperNova,Screen Name,sna — Shona language (ISO 639-2 code),SNAFU — “Situation Normal — All Fouled/Fucked Up”,SNAP — Supernova/Acceleration Probe,SNCB — Société nationale des chemins de fer de Belgique (French for “Belgian Railways National Society”, NMBS in Dutch),SNCF — Société nationale des chemins de fer français (French for “French Railways National Society”),snd — Sindhi language (ISO 639-2 code),SND — Standard Nomenclature Database,SNE — Synthetic Natural Environment,SNES — Super Nintendo Entertainment System,SNÉTA — Syndicat national pour l'étude des transports aériens (French for “Aerial transport Study National Syndicate”, 1919-1923),SNG — Satellite News Gathering (television)
4519	SNL- Saturday Night Live (television), Società Navigazione del Lago di Lugano,SNM — Special Nuclear Material,SNMP — Simple Network Management Protocol,SNOBOL — StriNg Oriented symBOlic Language,SNP — Single-nucleotide polymorphism
4520	SNR- SuperNova Remnant,Signal-to-Noise Ratio,SNRI — Serotonin-Norepinephrine Reuptake Inhibitor,SNS — Spallation Neutron Source,SNU — Solar Neutrino Unit,SO[edit],so — Somali language (ISO 639-1 code)
4521	SO- Shared Object (Unix),Sheriff's Office,Significant other, Somalia (ISO 3166 and FIPS 10-4 country code digram)
4522	SOA- service-oriented architecture, Society of Actuaries, State of the art
4523	SOAP- Simple Object Access Protocol,Supplemental Offer and Acceptance Program (U.S. medical residency matching)
4524	SOB- Son Of a Bitch,Same Old Bullshit,SOC — Sector Operations Centre,SOCCSKSARGEN — South Cotabato, Cotabato, Sultan Kudarat, Sarangani, General Santos City (a region in the Philippines; pronounced “sock-sar-gen”),SOCOM — (U.S.) Special Operations Command
4525	SoCon, Southern Conference (U.S. college sports)
4526	SOD-(i/a) School Of Dentistry,Statement Of Difference[s],Statement Of Direction,Statement Of Documentation,Statement Of Duty/Duties
4527	SOE- Secret Of Evermore,Special Operations Executive (WWII British organization),State Of Emissions (EW)
4528	SOF-(a/i) Special Operations Force,Status of Forces,SOFIA — Stratospheric Observatory For Infrared Astronomy
4529	SOGAT- Society of Graphical and Allied Trades,Former British printing union,SOHC — Single-OverHead-Cam engine,SOHO — Solar and Heliospheric Observatory,SOI — Signal Operating Instruction,SOL — Shit Out of Luck,SOLIS — Synoptic Optical Long-term Investigations of the Sun,som — Somali language (ISO 639-2 code)
4530	SOM- Simulation Object Model, Somalia (ISO 3166 trigram),Sonar — SOund Navigation And Ranging
4531	SOP- Standing/Standard Operating Procedure,State of Play
4532	SOR- State Of iness,Statement Of Requirements
4533	SOS- Somali shilling (ISO 4217 currency code),Save Our Souls,SOSTAR — Stand-Off Surveillance and Target Acquisition Radar,sot — Sotho language (ISO 639-2 code),SOUTHAG — Southern Army Group,SOUTHCOM — (U.S.) Southern Command,SOV — Single Occupant Vehicle,SOW — Statement Of Work,SOWHAT — RESNA Subcommittee on Wheelchairs and Transportation,SOX — Sarbanes-Oxley Act,SP[edit]
4534	Sp- Special,Spring tide (nautical charts), sine prole (Latin, “without offspring”)
4535	SP- Security Police,Self-Propelled,Shore Patrol, Spain (FIPS 10-4 country code), Start Point,Strong Point,spa — Spanish language (ISO 639-2 code),SPAAG — Self-Propelled Anti-Aircraft Gun,SPACECOM — (U.S.) Space Command,Spaser — Surface plasmon amplification by stimulated emission of radiation,SPC — Secretariat of the Pacific Community,SPCO — Single-Pole Change Over
4536	SPD- Shimano Pedaling Dynamics,Sozialdemokratische Partei Deutschlands (Social Democratic Party of Germany),SPDT — Single-Pole Double-Throw,SPEAC — Stop Primate Experiments at Cambridge (later became SPEAK),SPECTRE — SPecial Executive for Counter-intelligence, Terrorism, Revenge and Extortion,SPEED — Subsistence Preparation by Electronic Energy Diffusion (early military microwave oven),SPIE — originally the Society for Photo-Optical Instrumentation Engineers (“SPIE — The International Society for Optical Engineering” 1981-2007, “SPIE” since 2007)
4537	SPL- Scottish Premier League,Superior Parietal Lobule,Sound Pressure Level,SPM — Saint Pierre and Miquelon (ISO 3166 trigram),SPOD — (a/i) Sea Port of Debarkation,SPOE — (a/i) Sea Port of Embarkation,SPOT — Satellite pour l'observation de la Terre (French, “Satellite for Earth Observation”),SPQR — Senatus Populusque Romanus (Latin “The Senate and the People of Rome”),sps — sine prole superstite (Latin, “without surviving issue”),SPS — Standard Positioning Service (GPS),SPST — Single-Pole Single-Throw,SQ[edit],sq — Albanian language (ISO 639-1 code),SQ — Sound Quality,SQ — Standard Quality,sqi — Albanian language (ISO 639-2 code),SQL — (i/a) Structured Query Language (“seek-well”),SQUID — Superconducting QUantum Interference Device,SR[edit],sr — Serbian language (ISO 639-1 code),Sr — Strontium
4538	SR- Sound Reinforcement,Supply Route, Suriname (ISO 3166 digram), Sveriges Radio (Swedish Radio Ltd),SR — Sustained release of a drug
4539	SRAM- Scott (King), Ray (Day), SAM (Patterson) — founders of bicycle component manufacturer SRAM Corporation, Static Random Access Memory (“ess-ram”),SR-ATGW — Short-Range Anti-Tank Guided Weapon,SRB — Solid Rocket Booster,SRBM — Short-Range Ballistic Missile (cf. IRBM, ICBM),SRC — Scheduled Removal Component,srd — Sardinian language (ISO 639-2 code)
4540	SRD- Science Requirements Document, Surinam dollar (ISO 4217 currency code),SREL — Savannah River Ecology Laboratory
4541	SRG- SACEUR Rover Group,Special Republican Guard,SRGW — Short-Range Guided Weapon
4542	SRL- Savannah River Laboratory,Single Rocket Launcher,Survival Research Labs,SRM — Specified Risk Material,srp — Serbian language (ISO 639-2 code),SRS — Savannah River Site,SRSP — Science and Religion in Schools Project,SRTP — [Secure Real-time Transport Protocol],SS[edit],ss — Swati language (ISO 639-1 code)
4543	SSA- Cargo Submarine (US Navy hull classification), Social Security Administration (U.S.),Statistics South Africa,SSB — Single-sideband modulation,SSB — Sacramento Sustainable Business,SSBN — Nuclear-Powered Ballistic Missile Submarine (US Navy hull classification)
4544	SSC- Safe, Sane, Consensual (SM phrase),Secondary Somatosensory Cortex,Smaller-Scale Contingency,U.S. Army Soldiers System Center (Natick, Massachusetts),Superconducting Super Collider,SSCCATAGAPP — Singles, Seniors, Childless Couples, And Teens And Gays Against Parasitic Parents (fictional organization from The Simpsons)
4545	SSD- Solid-state drive, South Sudan (ISO 3166 trigram),SSDC — U.S. Space and Strategic Defense Command
4546	SSDD- Same Shit, Different Day,Single-Sided Double-Density (floppy disk)
4547	SSE- South South-East, Streaming SIMD Extensions,SSG — Guided Missile Submarine (retired US Navy hull classification),SSGN — Nuclear-Powered Guided Missile Submarine (US Navy hull classification),SSH — Saffir-Simpson Hurricane scale,SSK — Hunter-Killer Submarine (retired US Navy hull classification),SSKP — Single-Shot Kill Probability,SSL — Secure Sockets Layer,SSM — Surface-to-Surface (Guided) Missile
4548	SSN- Nuclear-Powered Attack Submarine (US Navy hull classification), SIM Serial Number,Social Security Number (U.S.),Socialist Solidarity Network,Subsystem number (SCCP, SS7),SSNW — Same Shit, New Wrapping,SSO — Submarine Oiler (retired US Navy hull classification),SSP — Submarine Transport (retired US Navy hull classification)
4549	SSR- Radar Picket Submarine (retired US Navy hull classification), Solid State Recorder
4550	SSRI- Selective Serotonin Reuptake Inhibitor,Social Systems Research Institute
4551	SSRN- Social Science Research Network, Nuclear-Powered Radar Picket Submarine (retired US Navy hull classification)
4552	SSS- Siding Spring Survey,Side Side Side (an acronym for remembering congruent triangles), Sigue Sigue Sputnik (band),S/SSM — Surface-to-Subsurface Missile
4553	SST- SuperSonic Transport, Training Submarine (US Navy hull classification),Saturated Suction Temperature (refrigeration cycles),SSTO — Single-Stage To Orbit,SSV — Soft-Skinned Vehicle (i.e., unarmoured),ssw — Swati language (ISO 639-2 code),SSW — South South-West,ST[edit],st — Sotho language (ISO 639-1 code)
4554	ST- Saint Lucia (FIPS 10-4 country code),São Tomé and Príncipe (ISO 3166 digram)
4555	STA- Scheduled Time of Arrival,Surveillance and Target Acquisition,STAG — (U.S.) Strategy and Tactics Group,STAGE — Scenario Toolkit And Generation Environment,STANAG — (NATO) Standardisation Agreement
4556	STAR- Scientific and Technical Aerospace Reports (NASA),Simulation of Tactical Alternative Responses,Special Threat Analysis and Recognition
4557	STAT- Signal Transducers and Activators of Transcription (cell biology),Special Tertiary Admissions Test (Australia)
4558	STB,Surface Transportation Board[2]
4559	STD- São Tomé and Príncipe dobra (ISO 4217 currency code), Sexually Transmitted Disease,STDM — Statistical Time Division Multiplexing,STENTOR — Satellite de télécommunications pour expérimenter de nouvelles technologies en orbite (French, “Orbital New Technology Experimental Telecommunications Satellite”)
4560	STFU- Southern Tenant Farmers Union,Stuff You[citation needed],STH — Sonic The Hedgehog
4561	STI- Sexually Transmitted Infection,Subaru Tecnica International,STK — Satellite Tool Kit,STM — Short Term Memory,STOL — Short Take-Off and Landing,STOVL — Short Take-Off and Vertical Landing
4562	STP- São Tomé and Príncipe (ISO 3166 trigram), Standard Temperature and Pressure,STR — Short Tandem Repeat (DNA analysis),STRATCOM — United States Strategic Command
4563	STRICOM- U.S. Army Simulation, Training & Instrumentation Command (1992-),Strike Command (1962-1971),STRIVE — Synthetic Tactical Real-time Interactive Virtual Environment,STSM — Senior Technical Staff Member,Stuka — Sturzkampfflugzeug (German WWII dive bomber),SU[edit],su — Sundanese language (ISO 639-1 code)
4564	SU- Soviet Union (ISO 3166 digram; obsolete 1992),Sudan (FIPS 10-4 country code),SUB — Student Union Building,SuD — Subject under Discussion,SUDC — Swedish United Dawah Center, a salafist Islamic organisation in Sweden
4565	SUI- Sonic user interface, Switzerland (IOC and FIFA trigram, but not ISO 3166),SUK — Start Up Kit,sun — Sundanese language (ISO 639-2 code),SUN — ,Soviet Union (ISO 3166 trigram; obsolete 1992),Stanford University Network that led to Sun Microsystems,SUNY — State University of New York (usually pronounced “sue-knee”),SUR — Suriname (ISO 3166 trigram),SURTASS — Surveillance Towed Array Sensor System,SUSAT — Sight Unit Small Arms, Trilux,SUV — Sport Utility Vehicle,SV[edit],sv — Swedish language (ISO 639-1 code)
4566	SV- El Salvador (ISO 3166 digram), Sportverein (German for “Sport Association”, as in Hamburger SV and SV Werder Bremen),SVC — Secondary Visual Cortex,SvD — Svenska Dagbladet (Swedish newspaper)
4567	SW- South-West ordinal direction,Sweden (FIPS 10-4 country code), Shortwave,swa — Swahili language (ISO 639-2 code)
4568	SWA-(i/a) Secure Web Access,South-West Asia,SWAC — Southwestern Athletic Conference,SWALK — Sealed With A Loving Kiss,SWAN — System for Wearable Audio Navigation,SWAP — Surface Waters Acidification Programme,SWAPO — South-West Africa People's Organisation,SWAT — Special Weapons And Tactics,swe — Swedish language (ISO 639-2 code),SWE — Sweden (ISO 3166 trigram)
4569	SWF- Shockwave Flash file (“swiff”),Single White Female
4570	SWG- Surface Warfare Group,Symbology Working Group,SWHR — Society for Women's Health Research,SWIG — Simplified Wrapper and Interface Generator,SWIR — (a/i) Short Wave InfraRed (“ss-why-are” or “swhirr”)
4571	SWLABR- She Was Like A Bearded Rainbow,Cream song (Bruce, Clapton and Baker),SWORD — Subjective WORkload Dominance,SWORDS — Special Weapons Observation Reconnaissance Detection System,SWOT — Strengths, Weaknesses, Opportunities, Threats (mnemonic)
4572	SWP- Special Working Party (“swipp”),Systematic Westing Plan (a plan of periodic westing of shares or mutual funds worth a fixed amount of money),Skill With Prizes (UK pub quiz machines — quality titles include: Pub Quiz, Quiz City, Frog in a Liquidizer, Who Wants To Win a Tenner?),SWT — Sea Water Tank,SWV — Sisters With Voices (American female R&B vocal group),SWZ — Swaziland (ISO 3166 trigram),SX[edit],SX — Sonic X
4573	T, Tera,Tesla,Tritium
4574	ta, Tamil language (ISO 639-1 code)
4575	Ta, Tantalum
4576	TA, Target Acquisition,Teaching Assistant, Tera-ampere, Territorial Army (UK), Tristan da Cunha (ISO 3166 digram)
4577	TAA, Transparency Anti-Aliasing, Trans Australia Airlines
4578	TAACOM, U.S. Theater Army Area Command
4579	TAADCOORD, Theatre Army Air Defence Co-ordinator
4580	TAAR, Trace Amine-Associated Receptor
4581	TAC, U.S. Tactical Air Command (1946-1992)
4582	TACAMO, Take Charge and Move Out (U.S. military)
4583	TACAN, Tactical Air Navigation
4584	TACC, Tactical Air Control Centre,(USAF) Tanker Airlift Control Center
4585	TACCO, Tactical Coordinator
4586	TACCSF, U.S. Theater Aerospace Command & Control Simulation Facility
4587	TACDAR, Tactical Detection And Reporting
4588	TACP, Tactical Air Control Party,Technology Applications Certification Program
4589	TACSOP, Tactical SOP (Standing Operating Procedure)
4590	TADIL, Tactical Digital Information Link
4591	TADSS, Training Aids, Devices, Simulators, and Simulations
4592	tah, Tahitian language (ISO 639-2 code)
4593	TAI, Target[ed] Area of Interest
4594	TAJ, Tom and Jerry
4595	TAJT, Tom and Jerry Tales
4596	TALES, Technical Advice and Lexicon for Enabling Simulation
4597	tam, Tamil language (ISO 639-2 code)
4598	TAN, Tanzania (IOC and FIFA trigram, but not ISO 3166)
4599	TANJ, There Ain't No Justice (used as expletive in the Ringworld novels)
4600	TANP, Terrain-Aware Network Planner
4601	TANSTAAFL, There Ain't No Such Thing As A Free Lunch (coined by author Robert A. Heinlein in his The Moon Is a Harsh Mistress)
4602	TAPPS, Texas Association of Private and Parochial Schools
4603	TARDIS, Time And Relative Dimension In Space (from Doctor Who)
4604	TARP, Transparency Accountability Rights for Parents (coined by Karen Plumridge, founder of Black Ribbon Gold Heart)
4605	TAS,Tasmania (postal symbol)
4606	TASER, Thomas A. Swift's Electric Rifle
4607	TASM, Tactical Air-to-Surface Missile
4608	tat, Tatar language (ISO 639-2 code)
4609	TAT, Tourism Authority of Thailand
4610	TATP, TriAcetone TriPeroxide
4611	TATT, Tired All The Time (medical diagnosis in-joke)
4612	Tb, Terbium
4613	TB, Tuberculosis
4614	TBA, to be announced
4615	TBBPA, TetraBromoBisPhenol-A
4616	TBC, to be confirmed, to be continued
4617	TBD, Torpedo Boat Destroyer
4618	TBF,to be fair
4619	TBGRI, Tropical Botanic Garden and Research Institute, India
4620	TBH, To Be Honest
4621	TBL, Turkish Basketball League
4622	TBM, Tactical Ballistic Missile,Theatre Ballistic Missile
4623	TBS, Turner Broadcasting System
4624	TBT, Tributyltin
4625	Tc, Technetium
4626	TC, Teracoulomb,Turks and Caicos (ISO 3166 digram),United Arab Emirates (FIPS 10-4 country code; from Trucial Coast States)
4627	TCA, Transformational Communications Architecture, Turks and Caicos (ISO 3166 trigram)
4628	TCAS, Traffic Collision Avoidance System
4629	TCAA, Top Counter-Assault Agents
4630	TCD, Chad (ISO 3166 trigram)
4631	TCG, Trusted Computing Group,Türkiye Cumhuriyeti Gemisi
4632	TCHD, Truck Cargo Heavy Duty
4633	TCL, Tool Command Language
4634	TCM, Turner Classic Movies
4635	TCP, Traffic Control Point,Transmission Control Protocol,Trichlorophenol
4636	TCU, Texas Christian University
4637	TCWMS, Tele-Center Workforce Management System
4638	TCW, Tasty Coma Wife
4639	TD- Territorial Decoration,Toon Disney,Toronto-Dominion (Bank); see also its U.S. subsidiary, TD Bank, N.A.,Touchdown,Tower Defence A game type, involves defending waves of enemies using tower
4640	TDA,The Disney Afternoon
4641	TDL, Tactical Data Link
4642	TDM, Time-Division Multiplexing
4643	TDMA, Time Division Multiple Access
4644	TDP, Technology Demonstration Programme
4645	TDRS, Tracking Data and Relay Satellite
4646	te, Telugu language (ISO 639-1 code)
4647	Te, Tellurium
4648	TE, Tactical Exploitation, Testosterone to Epitestosterone ratio, Tight end (American football; position generally not used in modern Canadian football)
4649	TEAL, Tasman Empire Airways Limited
4650	Team, Together everyone achieves more
4651	TEAMS, The East African Marine System (fiber optic cable)
4652	TED, Technology Entertainment Design prize
4653	TEETH, Tried Everything Else, Try Homeopathy (medical diagnosis in-joke)
4654	tel, Telugu language (ISO 639-2 code)
4655	TEL,(a/i) Transporter, Erector and Launcher
4656	TELAR, Transporter, Erector, Launcher And Radar
4657	TEMO, Training, Exercise, and Military Operations
4658	TENCAP, Tactical Exploitation of National Capabilities
4659	TERS, Tactical Event Reporting System
4660	TES, Tactical Event System
4661	TEST, Thesaurus of Engineering and Scientific Terms
4662	TEU, Twenty-foot equivalent unit (cargo capacity)
4663	TeVeS, Tensor Vector Scalar theory
4664	TF -
4665	TFMPP, Trifluorophenylmethylpiperazine
4666	TFR, Total Fertility Rate
4667	TFT, Thin-Film Transistor
4668	tg, Tajik language (ISO 639-1 code)
4669	Tg, Teragram
4670	TG, Togo (ISO 3166 digram)
4671	TGA, Tonga (IOC and FIFA trigram, but not ISO 3166)
4672	TGIF, Thank God It's Friday, Toes Go In First
4673	tgk, Tajik language (ISO 639-2 code)
4674	tgl, Tagalog language (ISO 639-2 code)
4675	TGO, Togo (ISO 3166 trigram)
4676	TGT- Target (also the ticker symbol for Target Corporation), Ticket Granting Ticket (computer security), Tyrese, Ginuwine, Tank,see TGT (group) for their collaboration
4677	th, Thai language (ISO 639-1 code)
4678	Th, Thorium
4679	TH, Terahenry,Thailand (ISO 3166 and FIPS 10-4 country code digram)
4680	tha, Thai language (ISO 639-2 code)
4681	THA, Thailand (ISO 3166 trigram)
4682	THAAD,(a/i) Terminal High Altitude Area Defence
4683	THB, Thai baht (ISO 4217 currency code)
4684	THEGENTRY, The High-End Group of Earth's New Technologies Research Yield
4685	THEL, Tactical High Energy Laser ACTD
4686	THG, Tetrahydrogestrinone
4687	ti, Tigrinya language (ISO 639-1 code)
4688	Ti, Tebi,Titanium
4689	TI, Tajikistan (FIPS 10-4 country code), Thermal Imaging,Threat Identification,Training Instructor,Texas Instruments
4690	TIA, Total Information Awareness initiative
4691	TIA, Transient Ischemic Attack
4692	TIALD, Thermal Imaging and Airborne Laser Designation
4693	TIBS, Tactical Information Broadcast System
4694	TIC, Troops In Contact
4695	TIGERS, Topologically Integrated Geographic Encoding and Referencing System
4696	TIM, Technical Information Memorandum,Technical Interchange Meeting,Toxic Industrial Material,Telecom Italia Mobile
4697	TIMS, Tactical Internet Management System,The Institute of Management Sciences,The International Molinological Society,Thermal Infrared Multispectral Scanner,Thermal Ionization Mass Spectrometry,Travel Information Management Services,Tuberculosis Information Management System
4698	TINC, There Is No Cabal
4699	TINY,That Is, Not You (internet slang)
4700	TIP, Thermal Identification Panel
4701	tir, Tigrinya language (ISO 639-2 code)
4702	tits,Toes in the Sand
4703	TJ, Tajikistan (ISO 3166 digram),Terajoule
4704	TJD, Truncated Julian Day
4705	TJK, Tajikistan (ISO 3166 trigram)
4706	TJS, Tajik somoni (ISO 4217 currency code)
4707	tk, Turkmen language (ISO 639-1 code)
4708	TK, Terakelvin,Tokelau (ISO 3166 digram)
4709	TKBL, Türkiye 1. Kadınlar Basketbol Ligi, the Turkish-language name of the Turkish Women's Basketball League
4710	TKL, Tokelau (ISO 3166 trigram)
4711	TKM, Turkmenistan (ISO 3166 trigram)
4712	tl, Tagalog language (ISO 639-1 code)
4713	Tl, Thallium
4714	TLPM,T1 Line Performance Monitor
4715	TL- Team Leader, Teralitre,Timor-Leste (ISO 3166 digram), ThermoLuminescence,TL;DR ,Too long; didn’t read.
4716	TLATOJL,The Life and Times of Juniper Lee
4717	TLA, Three-Letter Abbreviation/Acronym
4718	TLAM, Tomahawk Land Attack Missile
4719	TLAR- That Looks About Right (chat shorthand),Transporter-Launcher And Radar
4720	TLC- Tender Loving Care,The Learning Channel (now known strictly by the initials),Thin Layer Chromatography,T-Boz, Lefteye, Chilli,Tables, Ladders, and Chairs (type of professional wrestling match)
4721	TLD- Thermoluminescent Dosimeter,Top-Level Domain
4722	TLM- Traditional Latin Mass,Tridentine Latin Mass,Transaction Lifecycle Management
4723	TLS- Timor-Leste (ISO 3166 trigram), Times Literary Supplement,TM[edit]
4724	Tm- Terametre
4725	Thulium-
4726	TM- Technical Manual,Theatre Missile,Thematic Mapper, trademark (often written in small superscript type: TM or ™), Turing machine, Turkmenistan (ISO 3166 digram) Tympanic Membrane
4727	TMAP,(a/i) Texas Medication Algorithm Project
4728	TMC, The Movie Channel
4729	TMD, Theatre Missile Defence
4730	TMDK, The Mighty Don't Kneel (Australian professional wrestling stable also active in Japan)
4731	TMI, Too Much Information
4732	TMJ, TemporoMandibular Joint (syndrome)
4733	TMM, Turkmen manat (ISO 4217 currency code)
4734	TMNT, Teenage Mutant Ninja Turtles
4735	TMO- Table Mountain Observatory,Television match official (rugby union)
4736	TMP- East Timor (ISO 3166 trigram; obsolete 2002), Temporary
4737	TMPG, Transparent Multi-Platform Gateway
4738	TMR, Twin Main Rotors (helicopter type)
4739	TMS, Transcranial Magnetic Stimulation
4740	TMT, Thirty Meter Telescope
4741	TMTOWTDI, There's Than One Way To Do It (from Perl)
4742	tn, Tswana language (ISO 639-1 code)
4743	TN- Tennessee (postal symbol),Teranewton,Tonga (FIPS 10-4 country code),Tunisia (ISO 3166 digram)
4744	TNA, Total Nonstop Action Wrestling
4745	TND, Tunisian dinar (ISO 4217 currency code)
4746	TNO, Trans-Neptunian Object
4747	TNT- Thomas Nationwide Transport, an Australian company that was one of the predecessors to the former TNT N.V. and the current TNT Express, TriNitroToluene,(a/i) Turner Network Television,TO[edit]
4748	to, Tongan language (ISO 639-1 code)
4749	TO- Togo (FIPS 10-4 country code),Tonga (ISO 3166 digram)
4750	TOA- Table Of Authorities,Total Obligation Authority (accounting)
4751	TOAD- Temporary, Obsolete, Abandoned, or Derelict site (urbanism),Towed Optical Assessment Device
4752	TOBS, Time of OBServation
4753	TOC-(a/i) Table Of Contents,Tactical Operations Centre, Temporo-Occipital transition Cortex,Top of Concrete,To-do, To-do-List
4754	TOG, Togo (IOC and FIFA trigram, but not ISO 3166)
4755	TOGS, Thermal Observation Gunnery Sight
4756	TOMS, Total Ozone Mapping Spectrometer (satellite instrument)
4757	ton, Tongan language (ISO 639-2 code)
4758	TON, Tonga (ISO 3166 trigram)
4759	TOP, Tongan pa'anga (ISO 4217 currency code)
4760	TOS- Tape Operating System,Terms of service,The Original Series, used to distinguish the first Star Trek TV series from other parts of the media franchise,Tramiel Operating System
4761	TOT, Time On Target
4762	TOW, Tube-launched, Optically tracked, Wire-guided (anti-tank missile)
4763	TP- East Timor (ISO 3166 digram; obsolete 2002),São Tomé and Príncipe (FIPS 10-4 country code), Training Practice,Trident Ploughshares
4764	TPE, Chinese Taipei (IOC and FIFA trigram for the country also known as Taiwan)
4765	TPI, The point is
4766	TPO, Thrombopoietin
4767	TPS, The Pennington School
4768	TPTB, The Powers That Be (often used to refer to the people responsible for the content of TV series or movies)
4769	TQ, Top Qualifier (similar to Pole Position in car racing)
4770	tr, Turkish language (ISO 639-1 code)
4771	TR, Turkey (ISO 3166 digram)
4772	TRA, Technology iness Assessment
4773	TRAC, (U.S. Army) TRADOC Analysis Center
4774	TRACON, Terminal Radar Approach Control
4775	TRADOC, (U.S. Army) Training and Doctrine Command
4776	TRAIN, Tourist Railway Association, Inc.
4777	TRANSCOM, U.S. Transportation Command
4778	TRAP, Tactical Receive equipment and related Applications
4779	TRASANA, TRADOC Systems Analysis Agency
4780	TRD, Towed Radar Decoy
4781	TRIGAT, Third Generation Antitank (missile)
4782	TRL, Technology readiness level
4783	Trp, Troop
4784	TRP, Target Reference Point, Time of Reporting
4785	TRU, Transuranic
4786	TRUEX, Training in Urban Environment Exercise
4787	TRW, Thompson Ramo Wooldridge Inc.
4788	TRY, Turkish lira (ISO 4217 currency code)
4789	ts, Tsonga language (ISO 639-1 code)
4790	Ts, Terasecond
4791	TSA- Theatre Storage Area,Time Slot Allocation,Transportation Security Administration,The Salvation Army
4792	TSEC, Transmission Security Encryption Code
4793	TSL, Transportation Security Laboratory
4794	tsn, Tswana language (ISO 639-2 code)
4795	TSN- The Sporting News (historic name of the periodical now known as Sporting News),The Sports Network
4796	tso, Tsonga language (ISO 639-2 code)
4797	TSO- The Stationery Office (was HMSO until 1996),(U.S.) TRICARE Support Office, Trans-Siberian Orchestra (band)
4798	TSOP- Tactical Standing Operation Procedure,The Sound of Philadelphia (classic 1970s R&B instrumental)
4799	TSR,many, including Terminate and Stay Resident; see entry
4800	TSSIA, The Subject Says It All
4801	tt, Tatar language (ISO 639-1 code)
4802	TT- Teratesla, Terrestrial Time,Tourist Trophy (Motorcycle sport), Trinidad and Tobago (ISO 3166 digram)
4803	TTCT,Torrance Tests of Creative Thinking
4804	TTD, Trinidad and Tobago dollar (ISO 4217 currency code)
4805	TTO, Trinidad and Tobago (ISO 3166 trigram)
4806	TTFN, Ta Ta For Now
4807	TTL- Tax, Title, License, Through-the-lens (photography),Time 'till live,Time to live,Transistor-transistor logic
4808	TTP- Tactics, Techniques, and Procedures,Thrombotic thrombocytopenic purpura,Trailer Transfer Point
4809	TTTEAF,Thomas the Tank Engine and Friends
4810	TTY, TeleTYpewriter (Printer)
4811	TTYL, To You Later (Internet slang)
4812	TTZ, Tetrazolium
4813	TUC, Trades Union Congress
4814	TUG, TeX Users Group
4815	TUI,(a/i) Text-based user interface (cf. CLI), among other uses
4816	tuk, Turkmen language (ISO 639-2 code)
4817	TUN, Tunisia (ISO 3166 trigram)
4818	TUNS, Technical University of Nova Scotia
4819	Tur, Turkish language (ISO 639-2 code)
4820	TUR, Turkey (ISO 3166 trigram)
4821	TUSK, Tank Urban Survival Kit
4822	TUV, Tuvalu (ISO 3166 trigram)
4823	Tv, Time value, a designation seen on some camera dials for shutter priority mode
4824	TV- Television, Teravolt, Transvestite, Tuvalu (ISO 3166 and FIPS 10-4 country code digram)
4825	TVA, Tennessee Valley Authority
4826	TVG-(p/i) Television Games (Network), Tick, Very Good, Often used by School Teachers when marking homework etc. (Tick VG)[1][2]
4827	TVR, TreVor (Wilkinson) Racing
4828	TVS, Tornado vortex signature
4829	tw, Twi language (ISO 639-1 code)
4830	TW, Republic of China (Taiwan) (ISO 3166 and FIPS 10-4 country code digram),Terawatt
4831	TWAIN, Technology Without An Interesting Name
4832	TWD, Taiwan dollar (ISO 4217 currency code)
4833	TWE, Trans World Entertainment
4834	twi, Twi language (ISO 639-2 code)
4835	TWI, The Welding Institute
4836	TWN, Republic of China (Taiwan) (ISO 3166 trigram)
4837	TWP, Technical Working Paper
4838	TWS, Thermal Weapon Sight,Track While Scan
4839	TWIP, Take What Insurance Pays,When a surgeon agrees to accept a lower payment than he ordinarily would for a procedure and not charge the patient the difference
4840	TX, Texas (postal symbol),Transmit,Turkmenistan (FIPS 10-4 country code)
4841	TXV,Thermostatic Expansion Valve
4842	ty, Tahitian language (ISO 639-1 code)
4843	TYT,Take Your Time,Internet chat abbreviation
4844	TZ, Tanzania (ISO 3166 and FIPS 10-4 country code digram)
4845	TZA, Tanzania (ISO 3166 trigram)
4846	TZC, Tetrazolium chloride
4847	TZS, Tanzanian shilling (ISO 4217 currency code)
4848	U, Uranium
4849	UA, Ukraine (ISO 3166 digram) Unit of Action
4850	UAAP, University Athletic Association of the Philippines
4851	UAB, University of Alabama at Birmingham
4852	UAE,(i/s) United Arab Emirates (also IOC and FIFA trigram, but not ISO 3166)
4853	UAH- Ukrainian hryvnia (ISO 4217 currency code), University of Alabama in Huntsville
4854	UAV- Unmanned Aerial Vehicle,Unprotected Anal and Vaginal sex,UB[edit]
4855	UBC, United Baptist Church,University of British Columbia
4856	UBIGEO, Ubicación Geografica (Spanish for Geographical Location)
4857	UBS, Unbundled Bitstream Services,United Bank of Switzerland,United Banque Suisse
4858	UCBSA, United Cricket Board of South Africa
4859	UCAV,(a/i) Unmanned Combat Air Vehicle
4860	UCF, University of Central Florida
4861	UCLA, University of California, Los Angeles
4862	UCLES, University of Cambridge Local Examinations Syndicate
4863	UCR, University of Costa Rica,University of California, Riverside
4864	UCS, Union of Concerned Scientists
4865	UCSB, University of California, Santa Barbara
4866	UCSD, University of California, San Diego
4867	UDAS, Uppsala-DLR Asteroid Survey
4868	UDDI, Universal Description, Discovery and Integration
4869	UDP, User Datagram Protocol
4870	UDT, Underwater Demolition Team
4871	UDTS, Uppsala-DLR Trojan Survey
4872	UE, Unit of Employment
4873	UEFA, Union of European Football Associations
4874	UEFI,(i/a) Unified Extensible Firmware Interface
4875	UESAC, Uppsala-ESO Survey of Asteroids and Comets
4876	UFC, Ultimate Fighting Championship
4877	UFO, Unidentified Flying Object,United Farmers of Ontario
4878	ug, Uyghur language (ISO 639-1 code)
4879	UG, Uganda (ISO 3166 and FIPS 10-4 country code digram)
4880	UGA, Uganda (ISO 3166 trigram)
4881	UGV, Unmanned Ground Vehicle
4882	UGX, Ugandan shilling (ISO 4217 currency code)
4883	UHF, Ultra High Frequency
4884	UHMW, Ultra-High Molecular Weight
4885	UHRB, Ultra-High Resolution Building (simulation)
4886	UIC, University of Illinois at Chicago
4887	UID, User ID
4888	uig, Uyghur language (ISO 639-2 code)
4889	UIL, University Interscholastic League (governing body for most interscholastic activities, notably sports, in Texas public high schools)
4890	UIUC, University of Illinois at Urbana-Champaign
4891	UJTL, Universal Joint Task List
4892	uk, Ukrainian language (ISO 639-1 code)
4893	UK, United Kingdom (also FIPS 10-4 country code),University of Kentucky
4894	UKIP, United Kingdom Independence Party
4895	ukr, Ukrainian language (ISO 639-2 code)
4896	UKR, Ukraine (ISO 3166 trigram)
4897	UL, Underwriters Laboratories
4898	ULF, Ultra Low Frequency
4899	UM, U.S. Minor Outlying Islands (postal symbol; ISO 3166 digram)
4900	UMBC, University of Maryland, Baltimore County
4901	UMC, United Microelectronics Corporation,University of Missouri-Columbia
4902	UMCP, Unit Maintenance Collection Point
4903	UMES, University of Maryland Eastern Shore
4904	UMI, U.S. Minor Outlying Islands (ISO 3166 trigram)
4905	UMIST, University of Manchester Institute of Science and Technology
4906	UML, Unified Marxist-Leninist Communist Party of Nepal,Unified Modeling Language,University of Massachusetts Lowell,User-Mode Linux
4907	UMTS, Universal Mobile Telecommunications System
4908	UN, United Nations
4909	UNABOM, University and airline bomber (FBI case name)
4910	UNAIDS,(i/a) Joint United Nations Programme on HIV/AIDS
4911	UNAMSIL, United Nations Mission in Sierra Leone
4912	UNCF, United Negro College Fund
4913	UNCLOS, United Nations Convention on the Law of the Sea
4914	UNCSGN, United Nations Conference on the Standardization of Geographical Names
4915	UNCTAD, United Nations Conference on Trade and Development
4916	UNDCP, United Nations Drug Control Programme
4917	UNDE,(i/a) Union of National Defence Employees (Canada)
4918	UNDP, United Nations Development Programme
4919	UNEP, United Nations Environment Programme
4920	UNESCO, United Nations Educational, Scientific and Cultural Organization
4921	UNFCCC, United Nations Framework Convention on Climate Change
4922	UNFICYP, United Nations Peacekeeping Force in Cyprus
4923	UNGEGN, United Nations Group of Experts on Geographical Names
4924	UNHCR, United Nations High Commission (er) for Refugees
4925	UNICEF, United Nations Children's Fund (originally the United Nations International Children's Emergency Fund)
4926	UNICRI, United Nations Interregional Crime and Justice Research Institute
4927	UNIDO, United Nations Industrial Development Organization
4928	UNIFEM, United Nations Development Fund for Women (from the French Fonds de développement des Nations unies pour la femme)
4929	UNIS, University of Surrey, Guildford, England
4930	UNLV, University of Nevada, Las Vegas
4931	UNMIK, United Nations Interim Administration Mission in Kosovo
4932	UNMOVIC, United Nations Monitoring, Verification and Inspection Commission
4933	UNOSOM, United Nations Operations in Somalia
4934	UNPROFOR, United Nations Protection Force (in former Yugoslavia)
4935	UNRISD, United Nations Research Institute for Social Development
4936	UNSM, Union of Nova Scotian Municipalities
4937	UNTAC, United Nations Transitional Authority in Cambodia
4938	UNTAET,(i/a) United Nations Transitional Administration in East Timor
4939	UNU, United Nations University
4940	UP- Ukraine (FIPS 10-4 country code),Union Pacific Railroad (AAR reporting mark), Upper Peninsula (of Michigan),Uttar Pradesh
4941	UPC- United Pentecostal Church, Universal Product Code
4942	UPdM, Università Popolare della Multimedialità
4943	UPDM- Uganda People's Democratic Movement,Unified Modeling Language Profile for DoDAF and MoDAF,Unité de psychiatrie du développement mental,Universal Pattern Decomposition Method,Unix Power Device Management,Unpressurized Docking Mast,Urban Planning, Design and Management
4944	UPI, United Press International
4945	UPN, United Paramount Network
4946	UPS- Uninterruptible Power Supply,United Parcel Service
4947	UPTN- Universal Personal Telecommunications Number,Upper Peninsula Telehealth Network
4948	UPU, Universal Postal Union
4949	ur, Urdu language (ISO 639-1 code)
4950	UR, Soviet Union (NATO country code, obsolete 1992)
4951	URBSFA, Union royale belge des sociétés de football association (French for Royal Belgian Football Association)
4952	urd, Urdu language (ISO 639-2 code)
4953	URD, User Requirements Document
4954	URI- Uniform Resource Identifier,University of Rhode Island
4955	URU, Uruguay (IOC and FIFA trigram, but not ISO 3166)
4956	URY, Uruguay (ISO 3166 trigram)
4957	US, United States (also ISO 3166 and FIPS 10-4 country code digram)
4958	USA- United States of America (also ISO 3166 trigram),United States Army
4959	USAADAC, U.S. Army Air Defense Artillery Center, Fort Bliss, Texas
4960	USAARMC, U.S. Army ARMor Center, Fort Knox, Kentucky
4961	USAAVNC, U.S. Army AViatioN Center, Fort Rucker, Alabama
4962	USAF, United States Air Force
4963	USAFSPC, U.S. Air Force Space Command
4964	USAIC- U.S. Army Infantry Center,U.S. Army Intelligence Center
4965	USAID,(a/i) United States Agency for International Development
4966	USAP- Union Sportive des Arlequins Perpignanais, United States Antarctic Program
4967	USAPATRIOT, Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism
4968	USAREUR, United States Army Europe
4969	USB, Universal Serial Bus
4970	USC- United States Code,University of South Carolina,University of Southern California
4971	USCG, United States Coast Guard
4972	USCINCSPACE, United States Commander in Chief, Space Command
4973	USD- (U.S.) Under-Secretary of Defense* USD(A&T), (U.S.) Under-Secretary of Defense (Acquisition and Technology), United States dollar (ISO 4217 currency code),USD(AT&L), (U.S.) Under-Secretary of Defense for Acquisition, Technology, and Logistics,USD(C), (U.S.) Under-Secretary of Defense (Comptroller)
4974	USDA, United States Department of Agriculture
4975	USDI, United States Department of the Interior
4976	USDOE, United States Department of Energy
4977	USDRE, (U.S.) Under-Secretary of Defense for Research and Engineering (1978-1986)
4978	USEC, United States Enrichment Corporation
4979	USFL, United States Football League
4980	USFWS, United States Fish and Wildlife Service
4981	USGS, United States Geological Survey
4982	USIA, United States Information Agency
4983	USJFCOM, United States Joint Forces Command
4984	USL- United Soccer League, a third-level U.S. league. Not to be confused with an earlier league of the same name.,United Soccer Leagues, the organization that operates the above league, plus several other lower-level leagues,University of Southwestern Louisiana, a former name for the school now known as the University of Louisiana at Lafayette
4985	USMC, United States Marine Corps
4986	USMNT, United States men's national (soccer) team
4987	USN, United States Navy
4988	USNA, United States National Arboretum,United States Naval Academy
4989	USNB, United States Naval Base
4990	USNG, United States National Grid
4991	USNH, United States Naval Hospital
4992	USNI, United States Naval Institute
4993	USNO, U.S. Naval Observatory
4994	USNOFS, United States Naval Observatory Flagstaff Station
4995	USNP, United States Newspaper Program
4996	USNR, United States Navy Reserve
4997	USNS, United States Naval Ship
4998	USNZ, University Sport New Zealand
4999	USPS, United States Postal Service
5000	USPTO, United States Patent and Trademark Office
5001	USR- Universal System Resources (/usr, directory in a *NIX filesystem), User
5002	USS, United States ship (sometimes meaningless; see Star Trek)
5003	USSPACECOM, United States Space Command
5004	USSR, Union of Soviet Socialist Republics
5005	UST, Underground Storage Tank
5006	USTRANSCOM, United States Transportation Command
5007	USWNT, United States women's national (soccer) team
5008	UT, Universal Time
5009	UTEP,(a/i) University of Texas at El Paso (pronounced you-tep)
5010	UTM, Universal Transverse Mercator (geographical co-ordinate system)
5011	UU, Unitarian Universalism,University of Utah,Unseen University
5012	UUA, Unitarian Universalist Association
5013	UUID, Universally Unique Identifier (see also GUID)
5014	UUV, Unmanned Underwater Vehicle
5015	UV, Burkina Faso (FIPS 10-4 country code; from Upper Volta), ultraviolet
5016	UW, University of Washington
5017	UWO, University of Western Ontario
5018	UWT, Under Water Telephone
5019	UWTG, Under Water Tug
5020	UWW, United World Wrestling
5021	UXO, Unexploded Ordnance
5022	UY, Uruguay (ISO 3166 and FIPS 10-4 country code digram)
5023	UYU, Uruguayan peso uruguayo (ISO 4217 currency code)
5024	uz, Uzbek language (ISO 639-1 code)
5025	UZ, Uzbekistan (ISO 3166 and FIPS 10-4 country code digram)
5026	uzb, Uzbek language (ISO 639-2 code)
5027	UZB, Uzbekistan (ISO 3166 trigram)
5028	UZS, Uzbek som (ISO 4217 currency code)
5029	V, 5 (in Roman numerals),Vanadium,Volt
5030	VA, Vatican City-State (ISO 3166 digram), Veterans Affairs (U.S. Department of), Virginia (postal symbol), Various Artists
5031	VACIS, Vehicle And Container Inspection System
5032	VACIS, Victorian Ambulance Clinical Information System
5033	VANOS, Variable Nockenwelle System
5034	VAO, Vienna Art Orchestra
5035	VASIS, Visual Approach Slope Indicator System (aviation)
5036	VAT, Value-Added Tax, Vatican City-State (ISO 3166 trigram)
5037	VB, Victoria Bitter (beer),Visual Basic
5038	VBA, Visual Basic for Applications
5039	VC, Saint Vincent and the Grenadines (FIPS 10-4 country code; ISO 3166 digram), Victoria Cross
5040	VCDS, (Canada) Vice-Chief of the Defence Staff, VAG-COM Diagnostic System
5041	vCJD, Variant Creutzfeldt-Jakob Disease
5042	VCJCS, Vice Chairman, Joint Chiefs of Staff
5043	VCNO, (U.S.) Vice Chief of Naval Operations
5044	VCR, Video cassette recorder
5045	VCofS, Vice Chief of Staff
5046	VCT, Saint Vincent and the Grenadines (ISO 3166 trigram)
5047	VD, North Vietnam (ISO 3166 digram, obsolete 1977), Venereal Disease
5048	VDFS, VisualSVN Distributed File System (VDFS)
5049	VDR, North Vietnam (ISO 3166 trigram, obsolete 1977)
5050	ve, Venda language (ISO 639-1 code)
5051	VE, Venezuela (FIPS 10-4 country code; ISO 3166 digram)
5052	VEB, Venezuelan bolívar (ISO 4217 currency code)
5053	VEEGA, Venus Earth Earth Gravity Assist manœuvre
5054	ven, Venda language (ISO 639-2 code)
5055	VEN, Venezuela (ISO 3166 trigram)
5056	VERDI, Vittorio Emanuele Re D'Italia (Victor Emmanuel, King of Italy)
5057	VERITAS, Very Energetic Radiation Imaging Telescope Array System
5058	VFA- Victorian Football Association (historic Australian rules football league), Volatile Fatty Acid
5059	VfD, s for deletion (used in Wikipedia)
5060	VFL, Victorian Football League, the name of two distinct Australian rules football leagues:
5061	VFM, Value For Money
5062	VFMO, Very Fast Moving Object (astronomy)
5063	VFR, Visual Flight Rules
5064	VFT, Virtual Function Table
5065	VFW, Veterans of Foreign Wars
5066	VG, British Virgin Islands (ISO 3166 digram)
5067	VGB, British Virgin Islands (ISO 3166 trigram)
5068	VH1,(a/i) Video Hits One
5069	VHF, Very High Frequency
5070	vi, Vietnamese language (ISO 639-1 code)
5071	VIA, Versatile Interface Adapter
5072	VIC, Victoria, Australia (postal symbol), Video Interface Chip,Virginia Intermont College
5073	VIDS, Visual Information Display System
5074	vie, Vietnamese language (ISO 639-2 code)
5075	VII, 7 (in Roman numerals)
5076	VIII, 8 (in Roman numerals)
5077	VIN,(i/a) Vehicle Identification Number (ISO 3779)
5078	VIP, see entry
5079	VIR, U.S. Virgin Islands (ISO 3166 trigram),Virgin Atlantic Airways (ICAO code)
5080	VIS, Vavoua International School,Vienna Independent Shorts,Viewable Image Size,Visual Instruction Set
5081	VISCII, VIetnamese Standard Code for Information Interchange
5082	VIT, Vellore Institute of Technology
5083	VIVO, Video In Video Out
5084	VJ, Video Jockey
5085	VK, Australia (ham radio code), Västerbottens-Kuriren, a Swedish daily newspaper
5086	VLA, Very Large Array,(UK) Veterinary Laboratories Agency
5087	VLAD,(a/i) Vertical Line Array DIFAR
5088	VLBA, Very Long Baseline Array
5089	VLF, Very Low Frequency
5090	VLIW, Very Long Instruction Word
5091	VLPFC, VentroLateral PreFrontal Cortex
5092	VLPMC, VentroLateral PreMotor Cortex
5093	VLSF, Very Loud, Stink-Free
5094	VLSI, Very-large-scale integration
5095	VLVS, Very Loud, Very Stinky
5096	VM, Vietnam (FIPS 10-4 country code)
5097	VMF, Variable Message Format
5098	VMF,Marine Fighting Squadron of the United States Marine Corps
5099	VMN, VentroMedial Nucleus (neurophysiology)
5100	VN, Vietnam (ISO 3166 digram)
5101	VND, Vietnamese đồng (ISO 4217 currency code)
5102	VNIR, Visible and Near InfraRed
5103	VNM, Vietnam (ISO 3166 trigram)
5104	VNS,see entry
5105	VOA, Voice of America
5106	vo, Volapük language (ISO 639-1 code)
5107	VOC, Vereenigde Oostindische Compagnie (Dutch East India Company),Volatile organic compounds
5108	VOIP, Voice Over Internet Protocol
5109	vol, Volapük language (ISO 639-2 code)
5110	VOLT, Visual OpenType Layout Tool
5111	VON, Victorian Order of Nurses
5112	VOR, VHF Omnidirectional Ranging
5113	VOR, Voice of Russia
5114	VOX, Voice Operated oscillator
5115	VPN, Virtual Private Network
5116	VQ, Vector Quantization, U.S. Virgin Islands (FIPS 10-4 territory code)
5117	VR, Virtual Reality
5118	VRSG, Virtual Reality Scene Generator
5119	VSHORAD, Very Short Range Air Defence
5120	VSO, Voluntary Services Overseas
5121	VSR, Very Special Relativity
5122	VT- Vatican City-State (FIPS 10-4 country code),Vermont (postal symbol), Video tape,Virginia Tech
5123	VTC, Video Tele-Conference
5124	VTEC, Variable valve Timing and Electronic lift Control
5125	VTOL, Vertical Take-Off & Landing
5126	VU, Vanuatu (ISO 3166 digram), Vedanta University
5127	VUB, Vrije Universiteit Brussel (Belgian university)
5128	VUT, Vanuatu (ISO 3166 trigram)
5129	VUV, Vanuatu vatu (ISO 4217 currency code)
5130	VV, Via Voice,Village Voice
5131	VVAF, Vietnam Veterans of America Foundation
5132	VW, Volkswagen
5133	VZ, Verizon Communications (NYSE code)
5134	W, Tungsten (from German Wolfram),Watt,West
5135	W3C, World Wide Web Consortium
5136	wa, Walloon language (ISO 639-1 code)
5137	WA- Namibia (FIPS 10-4 country code; from West Africa),Washington state (postal symbol),Western Australia (postal symbol), World Archery (Federation)
5138	WAAC, Women's Army Auxiliary Corps (Britain) (World War I UK)
5139	WAAF, Women's Auxiliary Air Force (World War II UK)
5140	WAC- Western Athletic Conference, Women's Auxiliary Corps (World War II Canada),Women's Army Corps (World War II U.S.)
5141	WACC, Weighted Average Cost of Capital (accounting)
5142	WACS,What-A-Cartoon! Show
5143	WAD, Weapons Alert Designator
5144	WAGGGS, World Association of Girl Guides and Girl Scouts
5145	WAGs, Wives And Girlfriends (most notably of England national football team players at the 2006 FIFA World Cup, although the term existed earlier)
5146	WAK, Wake Island (ISO 3166 trigram, obsolete 1986)
5147	WAL,see entry
5148	WAN, Wide area network
5149	WAP, Wireless Application Protocol
5150	WAPIMA, What a pain in my ass
5151	WAR, With All Respect
5152	WAsP, Short form of WAAAAP (Wind Atlas Analysis and Application Program)
5153	WASP- White Anglo-Saxon Protestant,Wide Angle Search for Planets,Women Airforce Service Pilots
5154	WAYP, White And Yellow Pages
5155	Wb, Weber
5156	WB, Warner Bros.,Welcome Back (Internet shorthand)
5157	WBA- Warner Bros. Animation,West Bromwich Albion (F.C.),World Boxing Association
5158	WBC, World Boxing Council
5159	WBE, Work Breakdown Element
5160	WBO, World Boxing Organization
5161	WC, Water Closet,Winston Churchill,World Cup (sports)
5162	WCBO, World Chess Boxing Organisation
5163	WCBP, World Center for Birds of Prey
5164	WCL, World Confederation of Labour
5165	WCS, Weapon Control Status,Wildlife Conservation Society
5166	WCW, World Championship Wrestling
5167	WDC, Western Design Center,World Data Center
5168	WDWR,Walt Disney World Resort
5169	WDIN,Wildlife Disease Information Node
5170	WEBS, Weapon Effectiveness Battle Simulation
5171	WEC, World Extreme Cagefighting
5172	WEEE, Waste Electrical and Electronic Equipment
5173	WEF, World Economic Forum
5174	WEM, West Edmonton Mall
5175	WEU, Western European Union
5176	WEZ,(a/i) Weapon Engagement Zone
5177	WF, Wallis and Futuna Islands (ISO 3166 digram)
5178	WFC, Women's Forage Corps (World War II UK)
5179	WFD, Weapon of Focused Destruction
5180	WFF, Wallops Flight Facility
5181	WFP, World Food Program
5182	WFZ, Weapons Free Zone
5183	WFI,Water for Injection
5184	WG, Working Group,Wade-Giles
5185	WH, Wehrmacht Heer (German World War II army vehicle licence plate code)
5186	WHAM, Wisconsin Hydrogen-Alpha Mapping (telescope)
5187	WHI, Women's Health Initiative
5188	WHIP, Walks plus hits per inning pitched
5189	WHO, World Health Organisation
5190	WHS, (U.S.) Washington Headquarters Services
5191	WI, Western Sahara (FIPS 10-4 country code),Wisconsin (postal symbol),Women's Institute
5192	WIA, Wounded In Action, Wireless Institute of Australia (Amateur Radio)
5193	WIIFM, What's in it for me?
5194	WIMP, Weakly Interacting Massive Particle,Windows, Icons, Menus, Pointers
5195	WIPO,(a/i) World Intellectual Property Organization
5196	WIPP, [Nuclear] Waste Isolation Pilot Plant
5197	WIYN, Wisconsin Indiana Yale NOAO telescope consortium
5198	WK, Wake Island (ISO 3166 digram, obsolete 1986)
5199	WKYP, Will Keep You Posted
5200	WL, Wehrmacht Luftwaffe (German World War II air force vehicle licence plate code)
5201	WLB, Women's Land Brigade (World War II Canada)
5202	WLF, Wallis and Futuna Islands (ISO 3166 trigram)
5203	wln, Walloon language (ISO 639-2 code)
5204	WLOG, Without Loss Of Generality (see WOLOG)
5205	WM, Wehrmacht Marine (German World War II navy vehicle licence plate code)
5206	WMANUS, West Midlands Area National Union of Students
5207	WMD, Weapon[s] of Mass Destruction,World Movement for Democracy †
5208	WMI, Wildlife Management Institute
5209	WMO, World Meteorological Organization
5210	WNA, World Nuclear Association
5211	WNIT, Women's National Invitation Tournament
5212	WNSD, What's New, Scooby-Doo?
5213	WNW, West North-West
5214	wo, Wolof language (ISO 639-1 code)
5215	WO, Warrant Officer
5216	WOF,Width of Fabric
5217	WOFT, Waste Of Fucking Time
5218	WOFTAM, Waste Of Fucking Time And Money
5219	WOI,(a/i) Wheels Of Italy
5220	wol, Wolof language (ISO 639-2 code)
5221	WOM, Write Only Memory
5222	WOS, Wilson Ornithological Society
5223	WOSM- World Organization of the Scout Movement,Worldwide Oil Spill Model
5224	WOT, Waste Of Time
5225	WP, White Phosphorus (ammunition)
5226	WPB, War Production Board during World War II
5227	WPE, World Pork Expo
5228	WPK, Wider Peacekeeping
5229	WPT, World Poker Tour,World Premiere Toons
5230	WR, Wide Receiver (football)
5231	WRAC, Women's Royal Army Corps (World War II UK)
5232	WRAIR, Walter Reed Army Institute of Research
5233	WRC, World Rally Championship
5234	WRC,World Religions Conference
5235	WRVS, Women's Royal Voluntary Service, now only known by the acronym (UK)
5236	WRS, Worldwide Reference System
5237	WRT, Writer Response Theory
5238	WRT,World Rally Team
5239	WRT,Wallace Roberts & Todd, LLC (Urban Planning and Design)
5240	WRT,Wireless Ronin Technologies (digital signage)
5241	WRT,NHS Workforce Review Team
5242	WRT,The Linksys routers whose model name start with 'WRT'
5243	WRT,Wholesale, Trade, Retail sector, category in employment and economics statistics
5244	WRT,Wireless Receiver/Transmitter ( computer networks/IT )
5245	WRT,Third party firmware for the Linksys WRT routers and compatible models from other vendors.
5246	WRT,Web Runtime (WRT) is a portable application framework developed by Nokia that allows the creation of widgets on the S60 Platform.
5247	WS- Samoa (ISO 3166 and FIPS 10-4 country code digram; from the country's former name of Western Samoa), Writer to the Signet (a Scottish solicitor)
5248	WSC, Weapon System Catalogue
5249	WSDL, Web Services Description Language
5250	WSJ, (The) Wall Street Journal
5251	WSL- White Star Line (shipping company),Women's Super League, used to describe England's top women's association football league and top women's rugby union competition,Workers' Socialist League (UK political party)
5252	WSM- Samoa (ISO 3166 trigram; from Western Samoa), Winchester Short Magnum (family of rifle cartridges)
5253	WSROC, Western Sydney Regional Organisation of Councils
5254	WSSM, Winchester Super Short Magnum (family of rifle cartridges)
5255	WST- Water Soluble Tetrazolium (assay), Samoan tālā (ISO 4217 currency code)
5256	WSTC, Women Signallers Territorial Corps (World War II UK)
5257	WSW, West South-West
5258	WTB, Wales Tourism Board,Warenterminbörse Hannover
5259	WTC, World Trade Center
5260	WTF, What the fuck?; also What a Terrible Failure (android)
5261	WTFH, What The Fucking Hell
5262	WTH, What the Hell
5263	WTO, World Trade Organization
5264	WU, Wabash University,Washington University in St. Louis,Western Union,Windows Update,Work unit,WU Wien (German Wirtschaftsuniversität Wien, Vienna University of Economics and Business Administration)
5265	WUU2,What you up to,Internet slang popular with teenagers.
5266	WUBU2,What you been up to
5267	WV, West Virginia (postal symbol)
5268	WVA, World Veterinary Association
5269	WVIAC, West Virginia Intercollegiate Athletic Conference
5270	WVR, Women's Volunteer Reserve (World War II UK)
5271	WVSC, Women's Volunteer Service Corps (World War II Canada)
5272	WVU, West Virginia University
5273	WW,see entry
5274	WWE, World Wrestling Entertainment
5275	WWF- World Wide Fund for Nature, from its original name of World Wildlife Fund, which remains the legal name in the U.S. and Canada,World Wrestling Federation
5276	WWI, World War I
5277	WWII, World War II
5278	WWIII, World War III
5279	WWS, Wheaton Warrenville South High School
5280	WWV, Wagner-Werk-Verzeichnis (catalog of the works of Richard Wagner, and callsign of NIST's shortwave radio station in Fort Collins, Colorado)
5281	WWW, World Wide Web
5282	WWWF, World Wide Wrestling Federation
5283	WXO, Weather [Executive] Officer
5284	WY, Wyoming (postal symbol)
5285	WZ, Swaziland (FIPS 10-4 country code)
5286	XAF, BEAC (Banque des états de l'Afrique centrale) Central Africa CFA (Coopération financière en Afrique centrale) franc (ISO 4217 currency code)
5287	XAG, Silver Troy ounce (ISO 4217 currency code)
5288	XAU, Gold Troy ounce (ISO 4217 currency code)
5289	XBA, European Composite Unit (EURCO; Bonds market unit) (ISO 4217 currency code)
5290	XBB, European Monetary Unit (E.M.U.; Bonds market unit) (ISO 4217 currency code)
5291	XBML, eXtended Business Modelling Language
5292	XC, Ninety (in Roman numerals)
5293	XCBL, XML Common Business Library
5294	XCD, East Caribbean dollar (ISO 4217 currency code)
5295	XD,Used in chatrooms or email for smiley face. X is the eyes; squinted D is the mouth; XD.
5296	Xe, Xenon
5297	XF, Automobile made by Jaguar, Truck made by DAF Trucks, IATA code for Vladivostok Air
5298	XFA, XML Forms Architecture
5299	XFC, Xtreme Fighting Championships
5300	XFD, Fighter aircraft made by Douglas
5301	Xfe, X File Explorer
5302	XFF, X-Forwarded-For
5303	XFG, Exfoliation glaucoma
5304	XFH, 1932 rototype U.S. Navy fighter aircraft made by Hall, X-ray fluorescence holography
5305	XFN, XHTML Friends Network, IATA code for Xiangyang Liuji Airport
5306	XFR, Automobile made by Jaguar
5307	XFT, X FreeType interface library
5308	XFW, IATA code for Hamburg Finkenwerder Airport
5309	XG, Automobile made by Hyundai
5310	XGA, Extended Graphics Array
5311	XGG, IATA code for Gorom Gorom Airport
5312	XGN, IATA code for Xangongo Airport
5313	XGP, Extreme Game Player
5314	XGR, IATA code for Kangiqsualujjuag (Georges River) Airport
5315	xh, Xhosa language (ISO 639-1 code)
5316	xho, Xhosa language (ISO 639-2 code)
5317	XHTML, eXtensible Hypertext Markup Language
5318	XHR, eXtra high Image resolution,XMLHTTPRequest
5319	XI, Eleven (in Roman numerals)
5320	XII, Twelve (in Roman numerals)
5321	XIII, Thirteen (in Roman numerals)
5322	XIV, Fourteen (in Roman numerals)
5323	XIX, Nineteen (in Roman numerals)
5324	XJ, Automobile made by Jaguar, Automobile made by Jeep
5325	XJL, Amphibian aircraft made by Columbia, Automobile made by Jaguar
5326	XJS, Automobile made by Jaguar
5327	XK, Automobile made by Jaguar, Automobile made by Jeep, Kell blood group precursor
5328	XKA, IATA code for Kantchari Airport
5329	XKB, X keyboard extension
5330	XKE, Automobile made by Jaguar
5331	XKH, IATA code for Xieng Khouang Airport
5332	XKR, Automobile made by Jaguar
5333	XKS, IATA code for Kasabonika Airport
5334	XKY, IATA code for Kaya Airport
5335	XL, eXtra Large, Forty (in Roman numerals)
5336	XML, eXtensible Markup Language
5337	XMSF, eXtensible Modelling and Simulation Framework
5338	XN, Christian, Nordic Patent Institute
5339	XNA, IATA code for Northwest Arkansas Regional Airport, X-No-Archive, Xeno Nucleic Acid
5340	XNC, X Northern Captain
5341	XNN, IATA code for Xining Caojiabao Airport
5342	XNS, Xerox Network Systems, Extensible Name Service, Christians
5343	XNU, X is Not Unix
5344	XOF, BCÉAO (Banque centrale des états de l'Afrique de l'Ouest) West African CFA (Communauté financière d'Afrique) franc (ISO 4217 currency code)
5345	XP, eXperience Point (role-playing games)
5346	XPD, Palladium Troy ounce (ISO 4217 currency code)
5347	XPF, CFP franc (ISO 4217 currency code)
5348	XPT, Platinum Troy ounce (ISO 4217 currency code)
5349	XQJ, XQuery API for Java™
5350	XQP, IATA code for Quepos La Managua Airport
5351	XQU, IATA code for Qualicum Beach Airport
5352	XRML, eXtensible Rights Markup Language
5353	XS, Xiaolin Showdown
5354	XSL, eXtensible Style Language
5355	XTMH,eXtreme Technology Multiprocessor Hyperlanguage
5356	XUL, XML User Interface Language
5357	XV, Fifteen (in Roman numerals)
5358	XVI, Sixteen (in Roman numerals)
5359	XVII, Seventeen (in Roman numerals)
5360	XVIII, Eighteen (in Roman numerals)
5361	XWF, Xcitement Wrestling Federation
5362	XWM, X window manager
5363	XWN, eXtended WordNet
5364	XWS, X Window System
5365	XX, Twenty (in Roman numerals)
5366	XXX, Hardcore pornography (film rating),Thirty (in Roman numera
5367	XYA, IATA code for Yandina Airport
5368	Xyl, Xylobium
5369	XZA, IATA code for Zabré Airport
5370	XZN, Triple square screw driver
5371	y, Yocto-
5372	Y, Yotta,Yttrium
5373	Y2K, Year Two Thousand
5374	yA, Yoctoampere
5375	Ya, Yottayear
5376	YA, Yottaampere, Young Adult
5377	YAC,(a/i) Youth-Adult Committee
5378	YAFLA, Yet Another Five Letter Abbreviation
5379	YAP, Young Aspiring Professional
5380	YaBPr, Yet another Brother Pat rant
5381	YABSLAG, Yet another boy singing like a girl
5382	Yb, Ytterbium
5383	YB, Youcef Benzouada (Southern Algerian name)
5384	yC, Yoctocoulomb
5385	YC, Yottacoulomb
5386	YD, People's Democratic Republic of Yemen (ISO 3166 digram, obsolete 1990)
5387	YDS, Yosemite Decimal System (climbing)
5388	YE, Yemen (ISO 3166 digram)
5389	YEM, Yemen (ISO 3166 trigram),Manitowaning/Manitoulin East Municipal Airport IATA airport code
5390	YER, Yemeni rial (ISO 4217 currency code)
5391	yF, Yoctofarad
5392	YF, Yottafarad
5393	yg, Yoctogram
5394	Yg, Yottagram
5395	Ygo, Yu-Gi-Oh!
5396	YGCO, Yamaneko Group of Comet Observers
5397	yH, Yoctohenry
5398	YH, Yottahenry
5399	YHS,Ya Hoor sur!
5400	YHBT, You Have Been Trolled
5401	YHIH1, You Heard It Here First (lowercase: yhih1, pronounced yi-hi)
5402	YHII,You Have It Inside
5403	yi, Yiddish language (ISO 639-1 code)
5404	Yi, Yobi
5405	YI, Serbia and Montenegro (deprecated FIPS 10-4 country code, now RB (Serbia) and MJ (Montenegro))
5406	yid, Yiddish language (ISO 639-2 code)
5407	Yippie, Youth International Party + suffix
5408	yJ, Yoctojoule
5409	YJ, Yottajoule
5410	yK, Yoctokelvin
5411	YK, Yottakelvin
5412	YKYFCW,You know you're from Christchurch when (post-earthquake joke)
5413	yL, Yoctolitre
5414	YL, Yottalitre
5415	ym, Yoctometre
5416	Ym, Yottametre
5417	YM, Yemen (FIPS 10-4 country code), Your Magazine (originally Young Miss, later Young & Modern)
5418	YMCA, Young Men's Christian Association
5419	YMD, People's Democratic Republic of Yemen (ISO 3166 trigram, obsolete 1990)
5420	YMMD, You Make My Day
5421	yN, Yoctonewton
5422	YN, Yottanewton
5423	yo, Yoruba language (ISO 639-1 code)
5424	YO, former Yugoslavia (NATO country code, obsolete 1993)
5425	YOLO, You Only Live Once
5426	yor, Yoruba language (ISO 639-2 code)
5427	YPA, Yards per Pass Attempt (football statistic)
5428	YPIO, Your Problem Is Obvious
5429	YPO, Young Presidents' Organization
5430	ys, Yoctosecond
5431	yS, Yoctosiemens
5432	Ys, Yottasecond
5433	YS, Yottasiemens
5434	YSA- Single adult (LDS Church),Young Socialist Alliance,Youth Service America
5435	YSI, Young Scots for Independence
5436	yT, Yoctotesla
5437	YT, Mayotte (ISO 3166 digram),Yottatesla,Yukon Territory (postal symbol)
5438	YTD, Year-To-Date
5439	YTM, Yield to Maturity
5440	YTS, Youth Training Scheme
5441	YTT,Yoshi Topsy-Turvy
5442	YU, York University, former Yugoslavia (ISO 3166 digram, obsolete 2003)
5443	YUG, former Yugoslavia (ISO 3166 trigram, obsolete 2003)
5444	Yuppie, Young Urban Professional + suffix
5445	yV, Yoctovolt
5446	YV, Yottavolt
5447	yW, Yoctowatt
5448	YW, Yottawatt
5449	YWCA, Young Women's Christian Association
5450	YYH, YuYu Hakusho
5451	z, Zepto
5452	Z, Zetta
5453	za, Zhuang languages (ISO 639-1 code)
5454	zA, Zeptoampere
5455	ZA, South Africa (ISO 3166 digram),Zambia (FIPS 10-4 country code),Zettaampere
5456	ZAF, South Africa (ISO 3166 trigram)
5457	ZAMS, Zero age main sequence
5458	ZAR, South African rand (ISO 4217 currency code),Zaire (ISO 3166 trigram, obsolete 1997)
5459	ZAS,(i/a) Zylinder Abschaltung System
5460	ZBT, Zero-Balance Transfer (accounting)
5461	zC, Zeptocoulomb
5462	ZC, Zettacoulomb
5463	ZCM,(n) ZENworks Configuration Management
5464	ZCMK, Zone Control Master Key
5465	ZCU, Zimbabwe Cricket Union