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