PowerShell/Data/Abbr/general.csv

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