PowerShell/Data/Abbr/general.csv

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