PowerShell/Data/Abbr/Various.csv

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