PowerShell/Data/Abbr/general.csv

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