PowerShell/Data/Abbr/general.csv

1	ABBR	MEANING
2	0D	obvious deed
3	1AM	Air Mechanic 1st Class
4	1D	One-Dimensional
5	2AM	Air Mechanic 2nd Class
6	2D	Two-dimensional
7	2LA	Two Letter Acronym
8	2Lt	2nd Lieutenant
9	3AM	Air Mechanic 3rd Class
10	3D	Three-Dimensional
11	3G	Third-generation mobile telephone system
12	3i	Investors In Industry (venture capitalists)
13	3M	Minnesota Mining and Manufacturing Company
14	4G	Fourth-generation mobile telephone system
15	4WD	Four-wheel drive
16	5D	Five-Dimensional
17	6D	Six-Dimensional
18	7D	Seven-Dimensional
19	8D	Eight-Dimensional
20	9D	Nine-Dimensional
21	A	Ampere
22	A10	Atlantic 10 Conference
23	A1C	Airman First Class
24	A4	European standard office paper size
25	aA	Attoampere
26	AAA	administration,authorization,and authentication,American Automobile Association ('Triple-A'),anti-aircraft artillery,Amateur Athletic Association (of England),Asistencia Asesoría y Administración (Spanish,'Assistance,Consulting,and Administration'—Mexican professional wrestling promotion)
27	AAAS	American Association for the Advancement of Science
28	AAAV	Advanced Amphibious Assault Vehicle
29	AADAC	Alberta Alcohol and Drug Abuse Commission
30	AADD	Adult attention deficit disorder
31	AADT	annual average daily traffic
32	AAFES	Army and Air Force Exchange Service
33	AAIS	advanced airborne interceptor simulator
34	AAM	air-to-air missile
35	AAMOF	as a matter of fact
36	AAN	American Academy of Nursing
37	AANEAS	Anglo-Australian Near-Earth Asteroid Survey
38	AAODL	Atmospheric Aerosols and Optics Data Library
39	AAPC	Accounting and Auditing Policy Committee
40	AARP	American Association of Retired Persons (now officially known only by the initials)
41	AASPEM	advanced air-to-air system performance evaluation model
42	AAT	Australian Antarctic Territory
43	AAV	Amphibious Assault Vehicle
44	AAWC	anti-air warfare commander
45	AB	Able Seaman (both the rank and the occupation),Alberta (postal symbol)
46	ABB	ASEA Brown Boveri (Swiss-Swedish multinational company)
47	ABBA	Agnetha,Benny,Björn,Anni-Frid (Swedish pop group)
48	ABC	the first three letters of the Latin script known as the alphabet
49	ABC	abstinence, be faithful, condoms
50	ABC	Active Body Control
51	ABC	airway, breathing, circulation
52	ABC	Alcoholic Beverage Commission
53	ABC	alien big cat
54	ABC	always be careful
55	ABC	American-born Chinese
56	ABC	anti-lock brake controller
57	ABC	atomic, biological, chemical
58	ABCS	(U.S.) Army Battle Command System
59	ABET	Accreditation Board for Engineering and Technology
60	ABFIST	Advanced Bradley Full Crew Interactive Skills Trainer
61	ABGI	Addington-Barker Group International
62	ABIN	Agência Brasileira de Inteligência (Brazilian Intelligence Agency)
63	ABL	American Basketball League
64	ABLE	AirBorne Law Enforcement (police air support unit)
65	ABMC	American Battle Monuments Commission
66	ABN	Australian Business Number (a number issued by the Australian government as registration of a business and used for taxation purposes)
67	ABPI	Association of the British Pharmaceutical Industry
68	ABRSM	Associated Board of the Royal Schools of Music
69	ABS	acrylonitrile butadiene styrene, or: anti-lock braking system
70	ABSA	Amalgamated Banks of South Africa
71	ABSTRIPS	abstraction-based STRIPS
72	ABV	Alcohol by volume
73	ABW	Aruba (ISO 3166 trigram)
74	Ac	Actinium
75	AC	Adriamycin-Cyclophosphamide (chemotherapy),Air Conditioning,Aircraftman,Alternating Current,Altocumulus,ante Christum (Latin,'before Christ'; see BC),ante cibum (Latin,'before meals'),Antigua and Barbuda (FIPS 10-4 country code),Associazione Calcio (Italian,'football (soccer) club'),A/C,Air Conditioned/Conditioning,Aircraft
76	aC	Attocoulomb
77	AC1	Aircraftman 1st Class
78	AC2	Aircraftman 2nd Class
79	ACA	Affordable Care Act,shorthand for the Patient Protection and Affordable Care Act,commonly called 'Obamacare',Airspace Control Authority,Airspace Co-ordination Area,A Current Affair
80	ACARS	Aircraft Communications Addressing and Reporting System
81	ACB	Asociación de Clubes de Baloncesto (Spanish for 'Association of Basketball Clubs')
82	ACCAC	Awdurdod Cymwysterau,Cwricwlwm ac Asesu Cymru (Qualifications,Curriculum and Assessment Authority for Wales)
83	ACCD	American Coalition of Citizens with Disabilities
84	ACCS	Air Communications and Control Squadron
85	ACDA	Arms Control & Disarmament Agency
86	ACDC	Alternating Current Direct Current,the name of an Australian rock music band,a term for a bisexual person,A/Cdre,Air Commodore
87	ACDT	Apple Certified Desktop Technician,Australian Central Daylight Time
88	ACES	Aerolíneas Centrales de Colombia (Spanish,'Central Colombian Airlines'),Auxiliary Campus Enterprises and Services of Alfred State College
89	ACF	Administration for Children and Families,American Car and Foundry,American Culinary Federation
90	ACHT	Average Call Hold Time
91	ACINT	Acoustic Intelligence
92	ACK	Acknowledge (telecommunications; cf. NAK)
93	ACL	Access Control List,Anterior cruciate ligament; the initialism can also refer to an injury to this ligament.,Atlantic Coast Line Railroad
94	ACLJ	American Center for Law and Justice
95	ACLOS	Automatic CLOS (missile control system)
96	ACLS	American Council of Learned Societies
97	ACLU	American Civil Liberties Union,American Communist Lawyers Union (pejorative slang for the above)
98	ACM	many,including Association for Computing Machinery; see entry
99	ACMC	(U.S.) Assistant Commandant of the Marine Corps
100	ACN	Airborne Communications Node,Australian Company Number (number issued by the Australian government as registration of a limited liability company)
101	ACNA	Anglican Church in North America
102	ACO	Airspace Control Order
103	ACOBA	Advisory Committee on Business Appointments
104	ACOG	American College of Obstetricians and Gynecologists
105	ACOM	(U.S.) Atlantic Command
106	ACORN	Association of Community Organizations for Reform Now
107	ACP	African,Caribbean and Pacific Group of States,Air Control Point
108	ACR	Advanced Concepts and Requirements
109	ACRI	African Crisis Initiative
110	ACRT	Advanced Concepts Research Tool simulator
111	ACS	Affiliated Computer Services (NYSE ACS),Alaska Communications Service,American Cancer Society,American Chemical Society,Association of Caribbean States,Australian Computer Society
112	ACSC	Army Command and Staff College (various nations)
113	ACST	American Cooperative School of Tunis
114	ACST	Australian Central Standard Time
115	ACT	Adaptive Control of Thought (cognitive model),American College Test (ing Program),Australian Capital Territory (also postal symbol),ACT UP,AIDS Coalition to Unleash Power
116	ACTD	Advanced Concept Technology Demonstration
117	ACTF	(U.S.) Army Constructive Training Federation,Australian Children's Television Foundation,ACT-R,ACT-Rational (cognitive model),ACT-R/PM,ACT-R/Perceptual-Motor (cognitive model)
118	ACTU	Australian Council of Trade Unions
119	ACU	American Conservative Union
120	ACUF	Advisory Committee on Undersea Features,American Conservative Union Foundation
121	AD	Air Defence,Andorra (ISO 3166 digram),Anno Domini (Latin,'In the year of our Lord')
122	ADA	Air Defence Artillery,American Dental Association,Assistant District Attorney,Americans with Disabilities Act (see also the similar but non-acronymic Ada programming language)
123	ADAC	Allgemeiner Deutscher Automobil-Club (German for 'General German Automobile Club')
124	ADAGE	Air Defense Air to Ground Engagement (simulation)
125	ADAP	AIDS Drug Assistance Program
126	ADAS	Asiago-DLR Asteroid Survey
127	ADAT	Alesis Digital Audio Tape (recording format)
128	ADATS	Agricultural Development and Training Society,Air Defence Anti-Tank System,Australian Defence Air Traffic System
129	ADB	Asian Development Bank
130	ADC	Aide De Camp,U.S. Air Defense Command (1946-1992),Apple Display Connector,Program Against Digital Counterfeiting of Currency
131	ADD	Analog Digital Digital (CD quality),Attention-Deficit Disorder,Administration on Developmental Disabilities
132	ADDIE	Analyze Design Develop Implement and Evaluate
133	ADDNS	Advanced Deployable Day/Night Simulation
134	ADGB	Air Defence of Great Britain
135	ADHD	Attention-Deficit Hyperactivity Disorder
136	ADHS	Attention-Deficit Hyperactivity Syndrome
137	ADI	Acceptable/Allowable Daily Intake
138	ADIZ	Air Defence Identification Zone
139	ADL	Anti-Defamation League
140	ADM	Administrative,,Admiral,and the U.S. Public Health Service Commissioned Corps,Archer Daniels Midland,Assistant Deputy Minister
141	ADOA	Air Defence Operations Area
142	ADP	Adenosine DiPhosphate,Army Doctrine Publication (UK,Canada,Australia),Automatic/Automated Data Processing
143	ADRG	Arc-second Raster Chart (ARC) Digitized Raster Graphics
144	ADS	Active Denial System,Astrophysics Data System,Attention Deficit Syndrome
145	ADSR	Attack,Decay,Sustain,Release (sound envelope specification)
146	ADT	Atlantic Daylight Time (UTC−3 hours)
147	ADTB	Army Doctrine and Training Bulletin
148	ADW	Air Defence Warning
149	AE	Armed Forces Africa/Canada/Europe/Middle East (postal symbol),United Arab Emirates (ISO 3166 digram; FIPS 10-4 country code),Artix Entertainment,American Eagle,A&E, Arts & Entertainment Network,the original name for the U.S. TV channel now known as A&E Network
150	AEDT	Australian Eastern Daylight Time
151	AEF	American Expeditionary Force
152	AEGIS	Airborne Early warning Ground environment Interface Segment (fake etymology)
153	AESR	Aeronautical Equipment Service Record
154	AEST	Australian Eastern Standard Time
155	aet	After extra time (Football)
156	AEW	Airborne Early Warning,Airborne Electronic Warfare
157	AF	Afghanistan (FIPS 10-4 country code; ISO 3166 digram),Air Force,As f*ck
158	aF	Attofarad
159	AFA	U.S. Air Force Academy,Asociación del Fútbol Argentino (Spanish for 'Argentine Football Association')
160	AFAIC	As Far As I'm Concerned
161	AFAICT	As Far As I Can Tell
162	AFAIK	As Far As I Know
163	AFAIR	As Far As I Remember/Recall
164	AFAM	Associazione Friulana di Astronomia e Meteorologia (Italian,'Friuli Association of Astronomy and Meteorology'),Department of African and Afro-American Studies,University of North Carolina at Chapel Hill — notable for its links to the school's academic-athletic scandal in the 2010s
165	AFATDS	Advanced Field Artillery Tactical Data System
166	AFCEA	Armed Forces Communications and Electronics Association
167	AFDB	African Development Bank
168	AFES	Automatic Fire Extinguishing System
169	AFG	Afghanistan (ISO 3166 trigram)
170	AFI	French Territory of the Afars and Issas (ISO 3166 trigram; obsolete since 1977),'Agencia Federal de Investigaciónes' (México)
171	AFIST	Abrams Full Crew Interactive Skills Trainer
172	AFJ	April Fool's Joke
173	AFK	Away From Keyboard (Internet chat abbreviation)
174	AFLAC	American Family Life Assurance Company of Columbus
175	AFO	Association of Field Ornithologists
176	AFOSR	U.S. Air Force Office of Scientific Research
177	AFP	Agence France-Presse (French,'French Press Agency'), Australian Federal Police
178	AFQT	Armed Forces Qualification Test
179	AFRC	Air Force Reserve Command
180	AFRL	Air Force Research Laboratory
181	AFROTC	Air Force Reserve Officer Training Corps
182	AFRTS	Armed Forces Radio and Television Service
183	AFSC	U.S. Air Force Staff College (obsolete; replaced with JFSC), U.S. Air Force Systems Command
184	AFSCN	U.S. Air Force Satellite Control Network
185	AFSPC	Air Force Space Command
186	AFT	American Farmland Trust
187	AFV	armoured fighting vehicle
188	AG	air gunner,Aktiengesellschaft (German,'incorporated'),Algeria (FIPS 10-4 country code),Antigua and Barbuda (ISO 3166 digram),Assemblies of God
189	ag	Attogram
190	Ag	Silver (Latin argentum)
191	AGA	AB Gas-accumulator ('ah-gah',Swedish company),Advanced Graphics Architecture
192	AGARD	Advisory Group for Aerospace Research and Development
193	AGARDograph	Advanced Guidance for Alliance Research and Development publication
194	AGASA	Akeno Giant Air Shower Array (cosmic ray detector)
195	AGB	Internal Nintendo initialism (Advanced Game Boy) for Game Boy Advance
196	AGC	Adjutant General's Corps (British Army)
197	AGDC	Australian Game Developers' Conference
198	AGI	Auxiliary Group Intelligence
199	AGM	Annual General Meeting
200	AGN	Active Galactic Nucleus
201	AGO	Angola (ISO 3166 trigram)
202	AGP	Accelerated Graphics Port
203	AGRICOLA	Agriculture Online Access
204	AGS	Alaska Ground Station (LandSat)
205	AGTS	Advanced Gunnery Training System
206	AGU	American Geophysical Union
207	AGW	Autonomous Guided Weapon
208	Ah	Ampere-hour
209	AH	Attack Helicopter
210	aH	Attohenry
211	AHA	American Heart Association
212	AHCPR	Agency for Health Care Policy and Research (obsolete; replaced with AHRQ)
213	AHEC	Australian Health Ethics Committee
214	AHPCRC	Army High Performance Computing Research Center
215	AHQ	Air Headquarters
216	AHRQ	Agency for Healthcare Research and Quality
217	AHS	American Housing Survey
218	AI	Air Interdiction,Amnesty International,Artificial Insemination,Artificial Intelligence,Anguilla (ISO 3166 digram)
219	AIA	Aerospace Industries Association,American Institute of Architects,Anguilla (ISO 3166 trigram)
220	AIAA	American Institute of Aeronautics and Astronautics
221	AIC	African Independent Church,Animal Identification Coordinator
222	AICD	Australian Institute of Company Directors
223	AICMFP	And I Claim My Five Pounds
224	AID	U.S. Agency for International Development
225	AIDS	Acquired Immune Deficiency Syndrome
226	AIM	Australian Institute of Management
227	AIMP	Aurora Incremental Modernization Project
228	AIPAC	American Israel Public Affairs Committee
229	AIR	Aircraft Inventory Record
230	AIRFA	American Indian Religious Freedom Act
231	AIRS	Aerometric Information Retrieval System (obsolete; replaced with AFS)
232	AIS	Australian Institute of Sport,Automatic Identification System
233	AISB	(British Society for the Study of) Artificial Intelligence and the Simulation of Behaviour
234	aJ	Attojoule
235	AJ	Azerbaijan (FIPS 10-4 country code)
236	Ajax	Asynchronous JavaScript And XML
237	AJD	Astronomical Julian day
238	AJP	Allied Joint Publication
239	AJPW	All Japan Pro Wrestling
240	AK	Alaska (postal symbol)
241	aK	Attokelvin
242	AKA	Above knee amputation (orthopaedic usage)
243	AKDT	Alaska Standard Daylight Saving Time (UTC−8 hours)
244	AKP	Adalet ve Kalkınma Partisi (Turkish,'Justice and Development Party')
245	AKST	Alaska Standard Time (UTC−9 hours)
246	AL	Alabama (postal symbol),Albania (FIPS 10-4 country code; ISO 3166 digram),Anno Lucis (Latin,'Year of Light',in Masonic tradition,most often seen on plaques bearing the founding dates of buildings,in years AD and years AL)
247	Al	Aluminium
248	aL	Attolitre
249	ALA	Åland Islands (ISO 3166 trigram)
250	ALAP	As Long/Late As Possible
251	ALARM	Air-Launched Anti-Radar Missile
252	ALB	Albania (ISO 3166 trigram)
253	ALD	Accounting Line Designator (nuclear weapon targeting)
254	ALERT	Advanced Linked Extended Reconnaissance and Targeting,Attack and Launch Early Reporting to Theatre
255	ALF	Africa Leadership Forum,Alien Life Form (cf. ALF (TV series)),Animal Liberation Front
256	ALG	Algeria (IOC and FIFA trigram,but not ISO 3166)
257	ALGOL	ALGOrithmic Language
258	ALPA	Air Line Pilots Association
259	ALS	Amyotrophic Lateral Sclerosis
260	ALSHS	Abraham Low Self-Help Systems
261	ALSP	Aggregate Level Simulation Protocol
262	ALTE	Association of Language Testers in Europe
263	Am	Americium
264	AM	Amplitude Modulation and Ante Meridiem; see entry,Armenia (FIPS 10-4 country code; ISO 3166 digram)
265	AM1	Airman 1st class
266	AMCB	U.S. Army/Marine Corps Board
267	AMFOM	Advanced Missile Fly Out Model
268	AMFR	Age-specific Marital Fertility Rate,Amplitude Modulation Following Response
269	AMFRS	Advanced Multi-Function Radio Frequency System,Automatic Multisensor Feature-based Recognition System
270	AML	Acute Myeloid Leukaemia
271	AMLCD	Active Matrix Liquid Crystal Display
272	AMLO	Andrés Manuel López Obrador (Mexican politician),Anti-Money Laundering Office (Thailand government agency)
273	AMO	Atlantic Multidecadal Oscillation
274	AMOLED	Active-matrix organic light-emitting diode
275	AMOS	Advanced MOrtar System,Air Force Maui Optical and Supercomputing observatory
276	AMP	Adenosine MonoPhosphate,Automated Mission Planner
277	AMRAAM	Advanced Medium-Range Air-to-Air Missile
278	AMRDEC	U.S. Aviation & Missile Research,Development,& Engineering Center
279	AMS	Agriculture Marketing Service,American Mathematical Society
280	AMSAA	U.S. Army Materiel Systems Analysis Activity
281	AMSO	U.S. Army Model and Simulation Office
282	AMSU	Advanced Microwave Sounding Unit
283	AMTE	UK Admiralty Marine Technology Establishment (1977-1984)
284	AN	Andorra (FIPS 10-4 country code),Netherlands Antilles (ISO 3166 digram)
285	aN	Attonewton
286	ANA	Administration for Native Americans,Afghan National Army,All Nippon Airways,Anti-Nuclear Anti-body,Australian National Airways,Australian Natives' Association
287	ANC	African National Congress
288	AND	Andorra (ISO 3166 trigram)
289	ANFO	Ammonium nitrate/fuel oil (explosive)
290	ANGLiCo	Air/Naval Gunfire Liaison Company
291	ANL	Argonne National Laboratory
292	ANM	Acoustic Noise Monitor
293	ANOVA	ANalysis Of VAriance
294	ANS	Applied and Natural Sciences
295	ANSI	American National Standards Institute
296	ANT	Netherlands Antilles (ISO 3166 trigram),Antigua and Barbuda (IOC trigram,but not ISO 3166 or FIFA)
297	ANTM	America's Next Top Model
298	ANTY	Acronyms,No Thank You
299	ANWR	Arctic National Wildlife Refuge /ˈænwɑr/
300	ANZ	Australia and New Zealand Banking Group
301	ANZAC	Australian and New Zealand Army Corps
302	AO	Angola (FIPS 10-4 country code; ISO 3166 digram),Approach Officer (submarine),Area of Operations
303	AOC	Air Operations Centre,Air Officer Commanding
304	AOD	Adrenalin O.D. (punk rock band)
305	AOI	Angle Of Incidence (Arab Organization for Industrialization)
306	AOL	America OnLine
307	AOR	Area of Responsibility
308	AOSTH	Adventures of Sonic the Hedgehog
309	AOTS	Attack of the Show!
310	AOU	American Ornithologists' Union
311	AP	Advanced Placement,Air Publication,Andhra Pradesh (Indian state code),Armed Forces Pacific (postal symbol),Associated Press,Auto Pilot
312	APB	All Points Bulletin (police jargon)
313	APEC	Asia Pacific Economic Cooperation
314	APEDS	AMSAA Performance Estimates Data System
315	APEX	Applied Physics Express
316	APHA	American Public Health Association
317	APHIS	Animal and Plant Health Inspection Service
318	APL	Acute Promyeloid Leukaemia,Anti-Personnel Landmine,Applied Physics Laboratory (Johns Hopkins University)
319	APOD	Aerial Port (Airport) Of Debarkation
320	APOE	Aerial Port (Airport) Of Embarkation
321	APOLLO	Apache Point Observatory Lunar Laser-ranging Operation
322	APP	Allied Procedural Publication
323	APR	Annual Percentage Rate
324	AQIM	Al-Qaeda in the Islamic Maghreb
325	Ar	Argon
326	ARAG	Advanced Research and Assessment Group
327	ARB	Administrative Review Board
328	ARBA	Army Review Boards Agency
329	ARCA	Automobile Racing Club of America
330	ARCENT	United States Army Central Command
331	ARDA	Advanced Research and Development Activity (became DTO 2006)
332	ARF	ASEAN Regional Forum
333	ARG	Argentina (ISO 3166 trigram)
334	ARH	Armed Reconnaissance Helicopter
335	ARNet	Acquisition Reform Network
336	ARP	Applied Research Programme
337	ARPA	Advanced Research Projects Agency
338	ARRC	ACE Rapid Reaction Corps
339	ARRF	Allied Rapid Reaction Force
340	ARRL	American Radio Relay League
341	ARSC	Arctic Region Supercomputing Center
342	ARSPACE	U.S. Army Space Command
343	ARTCC	Air Route Traffic Control Center
344	ARWG	Army Research Working Group
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	asbl	association sans but lucratif (French 'Non-profit organisation')
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	ASICS	Anima sana in corpore sano (Latin,'A sound mind in a sound body') (athletic shoe manufacturer)
364	ASIO	Australian Security Intelligence Organisation,Audio stream input output
365	ASIP	Advanced System Improvement Program,Army Stationing and Installation Plan,Application-specific instruction-set processor
366	ASL	Above Sea Level,American Sign Language (also known as Ameslan),'Age,Sex,Location?' (Internet slang)
367	ASM	Air-to-Surface Missile,American Samoa (ISO 3166 trigram),American Society for Metals,American Society for Microbiology
368	ASMB	American Society for Matrix Biology,Adult Swim Message Board
369	ASME	American Society of Mechanical Engineers,American Society of Magazine ors
370	ASMP	Air-Sol Moyenne Portée missile (French 'Medium-range air to surface'),Asymmetric multiprocessing
371	ASN	Associate of Science in Nursing
372	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
373	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
374	ASPI	Australian Strategic Policy Institute
375	ASR	Alkali-silica reaction,Anti Slip Regulation
376	ASRAAM	Advanced Short-Range Air-to-Air Missile
377	ASSC	Association for the Scientific Study of Consciousness
378	AST	Atlantic Standard Time (UTC−4 hours)
379	ASTIA	Armed Services Technical Information Agency
380	ASTM	American Society for Testing and Materials
381	ASTREA	Aerial Support To Regional Enforcement Agencies (sheriff's air support unit)
382	ASUW	AntiSUrface Warfare
383	ASVAB	Armed Services Vocational Aptitude Battery(taken by juniors in high school in the USA)
384	ASVEL	Association Sportive Villeurbanne Éveil Lyonnais (Association Sportive is French for 'Sporting Association'; the club was founded through the merger of AS Villeurbanne and Éveil Lyonnais)
385	ASW	AntiSubmarine Warfare
386	ASWORG	(U.S.) AntiSubmarine Warfare Operations Research Group
387	ASX	Advanced Stream Redirector,Australian Securities Exchange
388	AT	Anti-Tank,Ashmore and Cartier Islands (FIPS 10-4 territory code),Austria (ISO 3166 digram),Advanced Technology (IBM Personal Computer/AT)
389	At	Astatine
390	aT	Attotesla
391	ATA	Advanced Technology Attachment (IBM Personal Computer),Afghan Transitional Authority,Allen Telescope Array,Antarctica (ISO 3166 trigram)
392	ATAC	Air Transportable Acoustic Communications
393	ATACMS	Army TACtical Missile System
394	ATAPI	Advanced Technology Attachment Packet Interface
395	ATAS	Air-To-Air Stinger (missile)
396	ATAT	Aiken Tactical Airsoft Team / Star Wars vehicle
397	ATB	Active Time Battle,British Antarctic Territory (ISO 3166 trigram; merged with AQ in 1979)
398	ATC	Air Training Corps, U.S. Air Transport Command (1942-1948), Athletic Trainer,Certified
399	ATCCIS	Army Tactical Command and Control Information System
400	ATESS	Aerospace and Telecommunications Engineering Support Squadron
401	ATF	French Southern Territories (ISO 3166 trigram),(U.S.) Bureau of Alcohol,Tobacco,Firearms and Explosives
402	ATG	Antigua and Barbuda (ISO 3166 and FIFA trigram)
403	ATGM	Anti-Tank Guided Missile
404	ATGW	Anti-Tank Guided Weapon
405	ATK	Attack
406	ATL	Atlanta,Georgia,the largest city and capital of Georgia
407	ATLAS	All-Terrain Lifter Army System,Assessment Tool for LAnd Systems
408	ATM	Automated Teller Machine,Asynchronous Transfer Mode,At The Moment
409	ATN	Dronning Maud Land (ISO 3166 trigram; merged with AQ in 1983)
410	ATO	Air Tasking Order,Australian Taxation Office
411	ATP	Adenosine TriPhosphate,Allied Tactical Publication,Ammunition Transfer Point
412	ATSD	(U.S.) Assistant Secretary of Defense
413	ATSDR	Agency for Toxic Substances and Disease Registry
414	ATV	All-Terrain Vehicle
415	ATWA	Air,Trees,Water,Animals
416	AU	African Union (was OAU before 2000),American University,Astronomical Unit,Australia (ISO 3166 digram),Austria (FIPS 10-4 country code)
417	Au	Gold (Latin Aurum)
418	AUC	Ab Urbe Condita / Anno Urbis Conditae (Latin 'from the founding of the city' / 'in the year since the founding of the city') (of Rome),Area Under the Curve (concentration time curve; medicine)
419	AUS	Australia (ISO 3166 trigram)
420	AUSCANNZUKUS	Australia,Canada,New Zealand,United Kingdom,United States (security designation)
421	Auslan	Australian Sign Language
422	AUT	Austria (ISO 3166 trigram)
423	AUTL	Army Universal Task List
424	AV	Anguilla (FIPS 10-4 territory code),Audio-Visual,Aviation
425	Av	Aperture value (photographic mode)
426	aV	Attovolt
427	AVA	American Viticultural Area
428	AVB	Audio Video Bridging
429	AVDLR	Aviation Depot Level Repair
430	AVGP	Armoured Vehicle, General Purpose
431	AVIM	Aviation Intermediate Maintenance
432	AVLB	Armoured Vehicle Launched Body
433	AVM	Air Vice-Marshal, Arteriovenous malformation
434	AVO	Apprehended Violence Order
435	AVP	Arubaanse Volkspartij
436	AVP	Association of Volleyball Professionals
437	AVRE	Armoured Vehicle Royal Engineers
438	AVTB	Armoured Vehicle Test Bed,Aviation Test Bed
439	AVUM	Aviation Unit Maintenance
440	AVVO	Acute Vaginal Venereal Outbreak
441	AW	Aruba (ISO 3166 digram)
442	aW	Attowatt
443	AWA	American Wrestling Association
444	AWC	Air Warfare Centre
445	AWD	All Wheel Drive
446	AWE	Advanced Warfighting Experiment
447	AWP	Awaiting Parts (SM&R code)
448	AWSIM	Air Warfare SIMulation
449	AWST	Australian Western Standard Time
450	AWW	Above Water Warfare
451	AX	Åland Islands (ISO 3166 digram)
452	AXP	Ambulance eXchange Point
453	AY	Antarctica (FIPS 10-4 territory code)
454	AYBABTU	All Your Base Are Belong To Us
455	AYU	As Yet Unknown
456	AZ	Arizona (postal symbol),Azerbaijan (ISO 3166 digram),Alkmaar Zaanstreek (Dutch football club)
457	AZE	Azerbaijan (ISO 3166 trigram)
458	AZUR	Actions en zone urbaine (French for: Urban Operations)
459	BAR	Barbados (IOC trigram,but not FIFA or ISO 3166),British American Racing,Browning Automatic Rifle,Buy-American Restrictions,BARD , Binational Agricultural Research and Development fund (between the US and Israel),BARDA , Biomedical Advanced Research and Development Agency,BART , Bay Area Rapid Transit,BAS , Battalion Aid Station,BASE , Building,Antenna,Span,Earth (parachute from),BASF , Badische Anilin und Soda Fabrik (Baden Aniline and Soda Factory,a German chemicals company),BASIC , Beginner's All-purpose Symbolic Instruction Code (acronym was added later,originally it was simply Basic),BAT , Basic Aid Training,BATF , U.S. Bureau of Alcohol,Tobacco,and Firearms,BATS , Behavior Analysis Training System ,Bradley Advanced Training System,BATTeRS , Bisei Asteroid Tracking Telescope for Rapid Survey,BB[edit]
460	BB	Barbados (ISO 3166 digram; FIPS 10-4 country code),Boys' Brigade (Christian youth organization),Brigitte Bardot (actress),Bumblebee
461	BBB	Better Business Bureau,Blood-brain barrier
462	BBC	Breeding Bird Census,British Broadcasting Corporation,Bumper to Back of Cab (trucking measurement)
463	BBL	Be Back Later,Bird Banding Laboratory,British Basketball League
464	BBN	Bolt,Beranek and Newman
465	BBQ	Barbecue
466	BBS	Breeding Bird Survey (North America),Brigade/Battalion Battle Simulation,Bulletin Board System,BBSRC , U.K. Biotechnology and Biological Sciences Research Council,BBVA , Banco Bilbao Vizcaya Argentaria (Spanish bank)
467	BBYO	B'nai B'rith Youth Organization
468	BC	Before Christ,Blind Copy (in emailers),Boston College,Botswana (FIPS 10-4 country code; from Bechuanaland),British Columbia (postal symbol)
469	BCA	Bachelor of Computer Application,Black Coaches & Administrators
470	BCC	Blind Carbon Copy
471	BCCI	Bank of Credit and Commerce International,Board of Control for Cricket in India,BCD , Binary-Coded Decimal
472	BEA	Banque extérieure d'Algérie,British European Airways (ancestor of British Airways),British Electricity Authority,bel
473	BEL	Belgium (ISO 3166 trigram)
474	BEN	Benin (ISO 3166 trigram)
475	BEO	Banquet Event Order
476	BERC	Business Environmental Resource Center
477	BER	Bit Error Rate
478	BH	Bahrain (ISO 3166 digram),Belize (FIPS 10-4 country code)
479	BHR	Bahrain (ISO 3166 trigram)
480	BNF	Backus-Naur Form (computing), British National Formulary
481	BNICE	Biological,Nuclear,Incendiary,Chemical,and Explosive Agents
482	BNP	British National Party,Banque Nationale de Paris,a predecessor to today's BNP Paribas
483	BNS	Bank of Nova Scotia
484	BNSF	Burlington Northern Santa Fe (also AAR reporting mark)
485	BO	Back Orifice,Belarus (FIPS 10-4 country code),Biarritz Olympique (French rugby union club),Bolivia (ISO 3166 digram),Body odor
486	BOAC	British Overseas Airways Corporation (predecessor of British Airways)
487	BoAML	Bank of America Merrill Lynch
488	BOC	British Orthodontic Society, British Oxygen Company
489	BÖC	Blue Öyster Cult
490	BODMAS	Brackets,Orders,Division,Multiplication,Addition,Subtraction
491	BOFH	Bastard Operator From Hell
492	BOGA	Bend Over and Grab Ankles
493	BOGOF	Buy One,Get One Free
494	BOGs	Bunch of Guys
495	BOI	Balance Of Investment,Basis Of Issue
496	BOL	Bolivia (ISO 3166 trigram)
497	BOM	Base Object Model,Bill Of Materials,Block of the Month quilting term,Business opportunity meeting
498	BOPD	Barrel of Oil Per Day
499	BOS	Battlefield Operating System
500	BOT	Balance of Trade,Botswana (IOC and FIFA trigram,but not ISO 3166),Build Operate Transfer,Bank of Thailand,BP[edit]
501	BP	Battle Position,British Petroleum (today,BP does not officially stand for anything),Solomon Islands (FIPS 10-4 country code; from British Protectorate of the Solomon Islands),Bp , Bishop,BPD , Bipolar Personality Disorder,BPM , Beats Per Minute,BPMo , Business Process Mobility
502	BPV	Battlefield Planning Visualization,Bovine papillomavirus
503	BQ	British Antarctic Territory (former ISO 3166 digram; merged with AQ in 1979),Caribbean Netherlands (current ISO 3166 digram; based on the entity's alternate name of Bonaire,Sint Eustatius and Saba),Navassa Island (FIPS 10-4 territory code)
504	BR	Brazil (ISO 3166 digram; FIPS 10-4 country code) ,Bihar (Indian state code),British Rail,Break Ranks (marching band term)
505	BRA	Brazil (ISO 3166 trigram)
506	BRAG	Bicycle Ride Across Georgia
507	BRASS	Breathe,Relax,Aim,Sight,Squeeze (acronym for using a rifle)
508	BSA	Birmingham Small Arms (motorcycles company),Boy Scouts of America,Brigade Support Area
509	BSatCoP	Benjamin Sniddlegrass and the Cauldron of Penguins
510	BSE	Bovine Spongiform Encephalopathy (better known as mad cow disease)
511	BSN	Baloncesto Superior Nacional (Spanish,'National Superior Basketball'; top Puerto Rican league),Bank Simpanan Nasional (Malay,'National Savings Bank'; government-owned Malaysian bank)
512	BSNL	Bharat Sanchar Nigam Limited,Bachelor of Science in Nursing
513	BSoD	Blue Screen of Death (distinct from BSD)
514	BSP	Between-Show Promotion,Binary Space Partitioning,Board Support Package,British Standard Pipe (screw thread),Business-sponsored,Bone sialoprotein
515	BST	Binary search tree,Blended Sales Tax,Bovine somatotropin,British Summer Time
516	BSW	British Standard Whitworth (screw thread)
517	BSX	Bendigo Stock Exchange
518	BT	Baal teshuva (Hebrew,'master of repentance') ,used to describe a Jew who adopts Orthodox Judaism as an adult,Bathythermograph,Bhutan (FIPS 10-4 country code; ISO 3166 digram),BitTorrent,British Telecom,the former name of the company now known as BT Group,BTDT , Been There,Done That,Bti , Bacillus thuringiensis israelensis,BTID , Battlefield Target Identification Device,BTIS , Battlefield Target Identification System
519	Bt	Baronet,Bacillus thuringiensis
520	BTO	Built To Order
521	BTP	British Transport Police
522	BTR	Bronetransporter (БТР = Бронетранспортер '(Heavy) Armoured (Personnel) Transporter')
523	BTU	British Thermal Unit
524	BTW	By The Way
525	BU	Bulgaria (FIPS 10-4 country code) -,Burma (ISO 3166 digram; obsolete since 1989)
526	BUAV	British Union for the Abolition of Vivisection
527	BUG-E	Battlefield Universal Gateway Equipment ('buggy')
528	BUNO	Bureau Number (aircraft serial number)
529	BUR	Burma (ISO 3166 trigram; obsolete since 1989)
530	BV	Background Vocals -,Battlefield Visualization ,,Bouvet Island (ISO 3166 digram; FIPS 10-4 territory code)
531	BVD	Bradley,Voorhees & Day (underwear manufacturer)
532	BVR	Beyond Visual Range
533	BVT	Bouvet Island (ISO 3166 trigram)
534	B&W	Babcock & Wilcox, Black and White, Bowers & Wilkins
535	BW	Bring Wedges (ISO digram)
536	BW	Botswana (ISO 3166 digram)
537	BWA	Botswana (ISO 3166 trigram)
538	BWARS	Bees,Wasps & Ants Recording Society
539	BWC	Biological and Toxin Weapons Convention
540	BWR	Boiling-Water Reactor
541	BX	Base eXchange
542	BY	Burundi (FIPS 10-4 country code), Belarus (ISO 3166 digram), Bavaria
543	BYOB	Bring Your Own Bottle (or beer, beverage, or booze) (multiple,but similar,meanings)
544	BYOC	Bring Your Own Computer (play on BYOB)
545	BYOF	Bring Your Own Flask
546	BYS	Byelorussian Soviet Socialist Republic (ISO 3166 trigram; obsolete since 1992)
547	BYU	Brigham Young University
548	BZ	Belize (ISO 3166 digram)
549	BZP	Benzylpiperazine
550	C	Carbon, Coulomb, One Hundred (in Roman numerals)
551	c	Centi
552	C2C	Consumer-To-Consumer electronic commerce, Cam-To-Cam internet chat
553	c2c	the British rail company formerly known as LTS Rail
554	Ca	Calcium
555	CA	California (postal symbol),Canada (FIPS 10-4 country code; ISO 3166 digram),Catalonia,Civil Affairs,Close Armour,Cocaine Anonymous,Computer Associates,Counter-Air,Cricket Australia
556	CAA	Canadian Automobile Association,(NORAD) Center for Aerospace Analysis,(U.S.) Center for Army Analysis,(U.S.) Clean Air Act,(U.S. Army) Concepts Analysis Agency,Civil Aviation Authority,Colonial Athletic Association
557	CAAT	Campaign Against Arms Trade,Center for Alternatives to Animal Testing
558	CAC	California Association of Criminalists,Chronic Asymptomatic [Disease] Carrier
559	CACM	Central American Common Market
560	CACM	Communications of the ACM
561	CADCAM	Computer-Aided Design/Computer-Aided Manufacturing
562	CADMID	Concept,Assessment,Demonstration,Manufacture,In service,Disposal (life cycle mnemonic)
563	CADPAT	CAnadian Disruptive PATtern
564	CAE	Canadian Aviation Electronics (originally),Certificate in Advanced English
565	CAEn	Close Action Engagement (constructive simulation)
566	CAF	Central African Republic (ISO 3166 trigram),Confederation of African Football (or French Confédération Africaine de Football)
567	CAFAD	Combined Arms For Air Defence
568	CAFDE	Canadian Association of Film Distributors and Exporters,Computer Aided Federation Development Environment
569	CAFE	Corporate Average Fuel Economy standard
570	CAI	Computer Assisted Instruction
571	CAIR	Council on American-Islamic Relations
572	CALABARZON	A region in the Philippines: CAvite,LAguna,BAtangas,Rizal,queZON
573	CALL	Center for Army Lessons Learned
574	CALM	Communications,Air-interface,Long and Medium range
575	CalPERS	California Public Employees' Retirement System
576	Caltrans	California Department of Transpotation
577	CAM	Chemical Agent Monitor,Complementary and alternative medicine,Computer-Aided Manufacturing,Crassulacean acid metabolism (type of photosynthesis)
578	CAMRA	CAMpaign for Real Ale
579	CAN	Canada (ISO 3166 trigram)
580	CANDU	CANada Deuterium Uranium (nuclear reactor design)
581	Canola	Canadian oil,low acid (referring to a specific cultivar of rapeseed bred to have a low erucic acid content)
582	CAPES	CAPability Evaluation System,Combined Arms Planning and Execution System
583	CARE	Citizens Association for Racial Equality (former New Zealand organisation),Community database on Accidents on the Roads in Europe,Cooperative for Aid and Relief Everywhere (originally Cooperative for American Remittances to Europe)
584	CARMONETTE	Computerized Monte Carlo Simulation
585	CARP	Computed Air Release Point
586	CART	Championship Auto Racing Teams (now defunct)
587	CAS	Chemical Abstracts Service,Chief of the Air Staff,Close Air Support
588	CASA	Civil Aviation Safety Authority
589	CASE	Cellular ammunition storage equipment,Computer-Aided Software Engineering
590	CASS	Command Activated Sonobuoy System
591	CASTFOREM	Combined Arms and Support Task FORce Evaluation Model
592	CASTOR	Canadian Automatic Small Telescopes for Orbital Research
593	CAT	Community Acceptance Testing
594	CATK	Counterattack
595	CATS	Computer Active Technology Suspension
596	CATT	Combined Arms Tactical Trainer
597	CAV	Cavalry
598	CAW	Canadian Auto Workers (trade union)
599	CB	Citizens' Band radio,Cambodia (FIPS 10-4 country code)
600	CBC	Canadian Broadcasting Corporation,Christmas Bird Count,Cipher-Block Chaining,Cornering Brake Control
601	CBE	Commander of the Order of the British Empire,Cab Beside Engine (see truck)
602	CBGB	Country,Blue Grass,and Blues (former New York City nightclub)
603	CBLA	Comparative bullet lead analysis
604	CBM	Canadian Baptist Ministries
605	CBM	Commodore Business Machines
606	CBML	Coalition Battle Management Language
607	CBN	CardsApp Brand Number
608	CBOL	Consortium for the Barcode of Life
609	CBOT	Chicago Board of Trade
610	CBR	Case-Based Reasoning
611	CBRN	Chemical,Biological,Radiological,or Nuclear (weapon or event)
612	CBRNE	Chemical,Biological,Radiological,Nuclear or [high-yield] Explosive (weapon or event)
613	CBS	Columbia Broadcasting System,Corps Battle Simulation
614	CBUS	Columbus,Ohio
615	CC	carbon copy
616	CCA	Counter Command Activity
617	CCC	Canterbury Clothing Company,Civilian Conservation Corps (U.S.,1930s and 1940s),Corpus Christi College,Oxford
618	CCCP	Central Committee of the Communist Party,Cyrillic for SSSR (Soyuz Sovetskikh Sotsialisticheskikh Respublik,Russian Союз Советских Социалистических Республик,Union of Soviet Socialist Republics)
619	CCD	Charge-Coupled Device,Confraternity of Christian Doctrine (Catechism)
620	CCF	Cartoon Cartoon Fridays
621	CCG	Canadian Coast Guard,Collectible Card Game
622	CCGC	Canadian Coast Guard Cutter,Canadian Coast Guard College
623	CCGH	Canadian Coast Guard Hovercraft
624	CCGS	Canadian Coast Guard Ship,Christ Church Grammar School
625	CCH	Computer-Controlled Hostile
626	CCIF	Comité consultatif international des communications téléphoniques à grande distance (French for International Telephone Consultative Committee,merged with the CCIT in 1956 to form the CCITT)
627	CCII	Command and Control Information Infrastructure,Community Capital Investment Initiative
628	CCIR	Comité consultatif international pour la radio (French for Consultative Committee on International Radio,became the ITU Radiocommunication Sector,ITU-R,in 1992),Commander's Critical Information Requirements
629	CCIT	Comité consultatif international télégraphique (French for International Telegraph Consultative Committee,merged with the CCIF in 1956 to form the CCITT)
630	CCITT	Comité consultatif international téléphonique et télégraphique (French for International Telegraph and Telephone Consultative Committee,became the ITU Telecommunication Standardization Sector,ITU-T,in 1992)
631	CCK	Cholecystokinin,Cocos (Keeling) Islands (ISO 3166 trigram)
632	CCM	Canada Cycle & Motor Co. Ltd. (now split into two separate companies bearing the CCM name,one manufacturing bicycles and the other ice hockey equipment),Contemporary Christian music
633	CCOC	Canadian Children's Opera Chorus,Crosley Car Owners Club
634	CCOP	Coalition Common Operating/Operational Picture
635	CCP	Casualty Collection Point,Communications Checkpoint,Contingency Communications Package
636	CCPA	Consumer Credit Protection Act
637	CCR	Creedence Clearwater Revival
638	CCRAp	Canadian Conservative Reform Alliance party
639	CCRP	Command and Control Research Program
640	CCRTS	Command and Control Research and Technology Symposium
641	CCSCS	Consultative Committee for Space Data Systems
642	CCSCS	Coordinadora de Centrales Sindicales del Cono Sur
643	CCSK	Cyclic Code Shift Keying
644	CCT	Current Commitments Team
645	Cd	Cadmium
646	cd	Candela
647	CD	Compact Disc
648	CD1	Cluster of Differentiation 1 (a small gene family)
649	CDA	UK Centre for Defence Analysis
650	CDD	Capabilities Development Document
651	CDE	Chemical Defence Equipment
652	CDipAF	Certified Diploma in Accounting and Finance
653	CDL	Commercial driver's license
654	CDM	Clean Development Mechanism (Kyoto protocol), Cold Dark Matter (astronomy)
655	CDMA	Code Division Multiple Access
656	CDMSII	Cryogenic Dark Matter Search II
657	Cdr	Commander
658	CDT	Central Daylight Time (UTC−5 hours)
659	Cdt	Commandant
660	Ce	Cerium
661	CE	Christian/Common Era
662	CEA	Campaign Effectiveness Analysis
663	CECOM	U.S. Army Communications and Electronics Command
664	CEI	Competitive Enterprise Institute
665	CENTCOM	United States Central Command
666	CENTO	Central Treaty Organization (Baghdad Pact)
667	CEO	Chief Executive Officer
668	CEP	Circular Error Probable
669	CERCLA	U.S. Comprehensive Environmental Response,Compensation,and Liability Act (Superfund)
670	CERDEC	U.S. Communications-Electronics Research,Development and Engineering Center
671	CERT	Computer Emergency Response Team
672	CESS	Centre for Earth Science Studies (India)
673	CEST	Central European Summer Time
674	CET	Central European Time
675	CEWC	Council for Education in World Citizenship
676	Cf	Californium
677	CF	Canadian Forces,Central African Republic (ISO 3166 digram),Republic of the Congo (FIPS 10-4 country code)
678	CFA	Cat Fanciers' Association,Chartered Financial Analyst,Colour Filtering Array,County Fire Authority,Covering Force Area
679	CFAR	Christine's,Federal Acquisition Regulation
680	CFC	ChloroFluoroCarbon,Canadian Fish Company
681	CFES	Continuous Flow Electrophoresis System
682	CFFZ	Call For Fire Zone
683	CFG	Context-free grammar,Control flow graph
684	CFHT	Canada-France-Hawaii Telescope
685	CFI	Center for Inquiry (CSICOP)
686	CFL	Canadian Football League,Co-ordinated Fire Line
687	CFLCC	Coalition Forces Land Component Command
688	CFM	Certified Facilities Manager
689	CFO	Chief Financial Officer
690	CFP	Call for papers, College Football Playoff, Common Fisheries Policy (EU)
691	CFRP	Carbon fibre reinforced plastic
692	CFS	Chronic Fatigue Syndrome
693	CFSP	Common Foreign and Security Policy
694	CFU	Colony Forming Unit in Microbiology
695	CFV	Cavalry Fighting Vehicle
696	CFZ	Critical Friendly Zone
697	CG	Client Group,Computer Graphics,Controls Group,Democratic Republic of the Congo (FIPS 10-4 country code),Republic of the Congo (ISO 3166 digram)
698	CGH	Comparative Genomic Hybridisation
699	CGIG	Cross-Government Implementation Group
700	CGO	Republic of the Congo (IOC and FIFA trigram,but not ISO 3166)
701	CGS	Chief of the General Staff
702	CGT	Capital Gains Tax
703	ch	ch(L) is used to denote the Chern character of a line bundle
704	CH	Chieftain tank,China (FIPS 10-4 country code),Switzerland (ISO 3166 digram; from Latin Confoederatio Helvetica)
705	CHAMPUS	(U.S.) Civilian Health and Medical Program of the Uniformed Services (now known as TRICARE)
706	CHAOS	Cambridge Heart Anti-Oxidant Study
707	CHAPS	Clearing House Automated Payment System
708	CHDK	Canon Hack Development Kit (Canon camera firmware hack)
709	CHE	Switzerland (ISO 3166 trigram; from Latin Confoederatio Helvetica)
710	CHI	Columbia Helicopters,Inc
711	CHiP	California Highway Patrol
712	CHIPS	Cosmic Hot Interstellar Plasma Spectrometer
713	CHL	Chile (ISO 3166 trigram)
714	CHLA	Core Historical Literature of Agriculture
715	CHN	China (ISO 3166 trigram)
716	CHOGM	Commonwealth Heads of Government Meeting
717	CHPSO	California Hospital Patient Safety Organization
718	CHRS	Canadian Heart Rhythm Society
719	CHT	Certified Hand Therapist
720	CI	Chile (FIPS 10-4 country code),Côte d'Ivoire (ISO 3166 digram),Counter-Intelligence,101 (in Roman numerals)
721	Ci	Curie
722	CIA	Cairo International Airport,Central Intelligence Agency,Culinary Institute of America
723	CIAO	Critical Infrastructure Assurance Office,Component-Integrated ACE ORB
724	CIB	Complete In Box (Internet auction/trading listings)
725	CIBC	Canadian Imperial Bank of Commerce
726	CID	Certified Interior Designer
727	CIEF	Comité international d'enregistrement des fréquences (International Frequency Registration Board)
728	CINC	Commander in Chief
729	CINEOS	Campo Imperatore Near-Earth Object Survey
730	CIPE	(European) Centre for International Political Economy
731	CIR	(Commander's) Critical Information Requirements
732	CIR	Corotating Interaction Region
733	CIS	Canadian Interuniversity Sport,Commonwealth of Independent States,Command and Information System,Communication and Information System
734	CISA	(U.S.) C4I Integration Support Activity
735	CISB	Complete In Sealed Box (Internet auction/trading listings)
736	CISPR	Comité international spécial des perturbations radioélectriques (Special International Committee on Radio Interference)
737	CISSP	Certified Information Systems Security Professional
738	CIV	Côte d'Ivoire (ISO 3166 trigram)
739	CIVPOP	Civilian Population
740	CIWS	Close-In Weapon System
741	CJ	Cayman Islands (FIPS 10-4 country code),Criminal Justice
742	CJC	Canadian Jewish Congress,Cold Junction Compensation
743	CJCS	Chairman of the Joint Chiefs of Staff
744	CJD	Chronological Julian Day,Creutzfeldt-Jakob Disease
745	CJO	Chief of Joint Operations
746	CJTF	Combined Joint Task Force
747	CK	Cocos (Keeling) Islands (FIPS 10-4 country code),Cook Islands (ISO 3166 digram)
748	CKA	commonly known as, Canada Kicks Ass
749	CKND	Codename: Kids Next Door
750	CL	Chile (ISO 3166 digram),Co-ordination Line,One Hundred and Fifty (in Roman numerals)
751	Cl	Chlorine
752	CLA	Clutterers Anonymous
753	CLEC	Competitive Local Exchange Carrier
754	CLEMARS	California Law Enforcement Mutual Aid Radio System
755	CLIC	Compact LInear Collider
756	CLO	Cornell Lab of Ornithology
757	CLOS	Command to Line-Of-Sight (missile control system)
758	CLPFC	CentroLateral PreFrontal Cortex
759	CLRP	College Loan Repayment Program
760	CM	Cameroon (FIPS 10-4 country code; ISO 3166 digram),Cruise Missile,Nine Hundred (in Roman numerals)
761	Cm	Curium
762	CMA	U.S. Chemical Materials Agency,Country Music Association (also used to refer to the organization's annual awards),Crystal Meth Anonymous
763	CMHC	Canada Mortgage and Housing Corporation
764	CMIIAW	Correct me if I am wrong
765	CMIS	Common management information service
766	CMJ	Christopher Martin-Jenkins (BBC sports commentator)
767	CMM	Capability Maturity Model
768	CMMC	Corps Materiel Management Centre
769	CMML	Chronic MyeloMonocytic Leukemia,Continuous Media Markup Language
770	CMOS	Canadian Meteorological and Oceanographic Society,(The) Chicago Manual of Style,Complementary Metal Oxide Semiconductor
771	CMP	Common [Operating/Operational] Maritime Picture
772	CMPD	Charlotte Mecklenburg Police Department
773	CMPD	Chronic Myeloproliferative Disease
774	CMR	Cameroon (ISO 3166 trigram),Coaxial Main Rotors (helicopter type)
775	CMS	Centers for Medicare and Medicaid Services,The Chicago Manual of Style
776	CMT	Country Music Television
777	CMU	Carnegie Mellon University,Central Michigan University,Concrete Masonry Unit
778	CMW	Marconi's Wireless Telegraph Company of Canada,Canadian Manufacturing Week,Canadian Music Week,Catherine McAuley Westmead (school in New South Wales,Australia),Chicago,Missouri and Western (Railway),Compartmented Mode Workstation,Compton's Most Wanted,Continuous Microwave (processing technology),Custom Maintenance Wizard (Microsoft Office Resource Kit)
779	CMYK	Cyan Magenta Yellow Key/blacK (colour model)
780	CN	Canadian National (railway; also the AAR reporting mark for said company),China (ISO 3166 digram),Comoros (FIPS 10-4 country code)
781	CNA	Center for Naval Analyses,Certified Network Administrator,Computer Network Attack,Continental (Casualty Company),National (Fire Insurance Company),and American (Casualty Company),the three companies that merged to form what is now known as CNA Financial
782	CNBC	Consumer News and Business Channel
783	CND	Campaign for Nuclear Disarmament,Computer Network Defence
784	CNE	Canadian National Exhibition,Computer Network Exploitation,Certified Network Engineer
785	CNF	Cost and Freight
786	CNI	Clinical Nursing Intern
787	CNI	Communications,Navigation and Identification
788	CNN	Cable News Network,Cellular Nonlinear Network
789	CNV	Copy-Number Variable (genetics)
790	Co	Cobalt
791	COB	Close Of Business [day]
792	COBRA	Consolidated Omnibus Budget Reconciliation Act of 1985
793	COD	Cash On Delivery,Democratic Republic of the Congo (ISO 3166 trigram)
794	CoDA	Co-Dependents Anonymous
795	COGENT	Cognitive Objects within a Graphical EnviroNmenT
796	COIL	Chemical Oxygen Iodine Laser
797	COK	Cook Islands (ISO 3166 trigram)
798	COL	Colombia (ISO 3166 trigram)
799	COLA	Cost Of Living Adjustment
800	CONAD	U.S. Continental Air Defense Command
801	CONUS	Continental United States
802	COO	Chief Operating Officer
803	COPE	U.K. Committee On Publication Ethics
804	COPUS	U.K. Committee on the Public Understanding of Science
805	CORD	Common Operational Requirements Document
806	CORE	Consortium for Oceanographic Research and Education
807	COS	Cooper Ornithological Society
808	COSER	COoperative SERvice
809	CoT	Car of Tomorrow (former NASCAR race car design)
810	COTS	Commercial Off The Shelf
811	CP	Canadian Pacific,Check Point,Command Post,Club Penguin
812	CPA	Certified Public Accountant
813	CPCU	Certified Property Casualty Underwriter
814	CPD	Capabilities Production Document
815	CPE	Certificate of Proficiency in English
816	CPE	Certified Professional Ergonomist
817	CPF	Calibration Parameter File,Canadian Patrol Frigate
818	CPG	Clinical Practice Guideline
819	CPIM	Certification on Production and Inventory Management
820	CPIR	Computationally-Private Information Retrieval
821	CPON	Certified Pediatric Oncology Nurse
822	CPPCC	Chinese People's Political Consultative Conference
823	CPR	Canadian Pacific Railway
824	CPR	Cardiopulmonary resuscitation
825	CPSM	Continuous Phase Shift Modulation
826	CPSU	Communist Party of the Soviet Union
827	CPT	Contingency Planning Team
828	CPU	Contract Postal Unit
829	CPV	Cape Verde (ISO 3166 trigram)
830	CPX	Command Post eXercise
831	CQ	Carrier Qualification,Central Queensland,Charge of Quarters,Congressional Quarterly,Constellation Airlines (IATA airline designator),Northern Mariana Islands (FIPS 10-4 territory code)
832	Cr	Chromium
833	CR	Coral Sea Islands (FIPS 10-4 territory code),Costa Rica (ISO 3166 digram)
834	CRAM	Combined Radiometric Correction Model
835	CRD	Capstone Requirements Document
836	CREB	Cyclic AMP-response Element Binding (protein)
837	CREEP	Committee for the Re-Election of the President,a pejorative nickname used by opponents
838	CREN	Christian Real Estate Network Real Estate Association
839	CRI	China Radio International,Costa Rica (ISO 3166 trigram)
840	CRIPL	Consolidated Remain-In-Place List
841	CRM	Cardiac Rhythm Management,Customer Relationship Management
842	CRO	Croatia (IOC and FIFA trigram,but not ISO 3166)
843	CRP	Committee for the Re-Election of the President,Control and Reporting Post
844	CRT	Cardiac Resynchronization Therapy,Cathode Ray Tube,Chinese Remainder Theorem
845	CRTC	Canadian Radio-television and Telecommunications Commission
846	Cs	Caesium
847	CSA	Canadian Soccer Association,Canadian Space Agency,Canadian Standards Association,Child Support Agency,Command Staff Advisor,Community-supported agriculture,Confederate States of America,Corps Storage Area,Czech Airlines,C/S/A,CINC,Service,and Agency
848	CSC	Closed Spacelike Curve (relativity),Compact system camera,Computer Sciences Corporation,Computer Security Centre,CSCC Canadian Society of Clinical Chemists
849	CSERIAC	(U.S. DoD) Crew Systems Ergonomics Information Analysis Center
850	CSG	Corps Support Group
851	CSI	see entry
852	CSICOP	Committee for the Scientific Investigation of Claims of the Paranormal (became the Committee for Skeptical Inquiry in 2006)
853	CSIP	Commercial Stable Image Platform (AMD)
854	CSK	Czechoslovakia (ISO 3166 trigram; obsolete since 1993)
855	CSL	U.K. Central Science Laboratory
856	CSPI	Center for Science in the Public Interest
857	CSR	Control Supply Rate
858	CSR	Corporate Social Responsibility
859	CSRC	Conflict Studies Research Centre
860	CSRF	Cross-Site Request Forgery
861	CST	Central Standard Time (UTC−6 hours)
862	CT	Computed tomography (medical scan also known as a CAT scan),Central Time zone,Chrono Trigger (Computer/Video games),Connecticut (postal symbol),Canterbury (postal symbol),Chhattisgarh (Indian state code)
863	CTBT	Comprehensive [Nuclear] Test Ban Treaty
864	CTDB	Compact Terrain Data Base (file format)
865	CTGF	connective tissue growth factor
866	CTI	Co-operative Target Identification
867	CTIL	Critical Tracked Items List
868	CTIS	Central Tire Inflation System
869	CTMS	Clinical Trial Management System
870	CTSS	Compatible Time-Sharing System
871	CTU	Counter Terrorist Unit (fictional branch of the Central Intelligence Agency in the television action series 24)
872	CTVT	Canine Transmissible Venereal Tumour
873	Cu	Copper (Latin Cuprum)
874	CUB	Cuba (ISO 3166 trigram)
875	CUCV	Commercial Utility Cargo Vehicle
876	CUPS	Common Unix Printing System
877	CUPW	Canadian Union of Postal Workers
878	CUREA	Consortium for Undergraduate Research and Education in Astronomy
879	CuW	Copper-tungsten pseudo-alloy (from the chemical symbols of the two component elements)
880	CUW	Curaçao (ISO 3166 trigram)
881	CV	curriculum vitae (résumé)
882	CVLL	Crypto Variable Logic Label
883	CVSD	Continuous Variable Slope Delta (modulation)
884	CVT	Continuously Variable Transmission
885	CW	Calendar Week, or: Continuous Wave, or: Clothes Washer, or: Cook Islands (FIPS 10-4 territory code)
886	CWC	Chemical Weapons Convention
887	CWRU	Case Western Reserve University
888	CWS	Canadian Wildlife Service
889	CX	Christmas Island (ISO 3166 digram),or: One Hundred and Ten (in Roman numerals)
890	CXR	Christmas Island (ISO 3166 trigram)
891	CY	Calendar year, or: Cyprus (ISO 3166 and FIPS 10-4 country code digram)
892	CYM	Cayman Islands (ISO 3166 trigram)
893	CZE	Czech Republic (ISO 3166 trigram)
894	CZF	(Christian Zombie Fan)
895	CZMA	(US) Coastal Zone Management Act
896	d	Deci
897	D	Deuterium
898	DAFIF	Digital Aeronautical Flight Information File
899	DAK	Disney's Animal Kingdom
900	DAO	Division Ammunition Officer
901	DARE	Drug Abuse Resistance Education
902	DARO	(U.S.) Defense Airborne Reconnaissance Office
903	DARPA	U.S. Defense Advanced Research Projects Agency
904	DAS	Defensive Aids Suite
905	DASD	(U.S.) Deputy Assistant Secretary of Defense
906	DASL	Datapoint's Advanced Systems Language
907	DAU	(U.S.) Defense Acquisition University
908	DAWN	(U.S.) Drug Abuse Warning Network
909	dB	Decibel
910	DB	Deutsche Bahn
911	Db	Dubnium
912	DBA	De Bellis Antiquitatis (miniature wargaming rules)
913	DBBL	(U.S. Army Simulation Center) Dismounted Battlespace Battle Laboratory
914	DBDO	Desert BDO
915	DBE	Dame Commander of the Order of the British Empire
916	DBF	Detection By Fire (weapon launch signature)
917	DBR	De Bellis Renationis (miniature wargaming rules)
918	DBRA	Davis-Bacon Related Acts
919	DBS	Direct Broadcast Services (television)
920	DCAA	(U.S.) Defense Contract Audit Agency
921	DCAS	Devon and Cornwall Archery Society
922	DCC	Dallas Christian College
923	DCD	[Organ] Donation after Cardiac Death
924	DCE	Data Communication Equipment
925	DCFC	Death Cab for Cutie
926	DCL	Disney Cruise Line
927	DCN	Deacon
928	DCOM	Disney Channel Original Movie
929	DCSOPS	Deputy Chief of Staff for Operations and plans
930	DCW	Digital Chart of the World
931	DCYSC	Discovery Channel Young Scientist Challenge
932	DD	due diligence and dear daughter (increasingly prevalent on social mailing lists,blogs,and bulletin boards)
933	DDA	Deputy District Attorney
934	DDN	U.S. Defense Data Network
935	DDS	Doctor of Dental Surgery
936	DEA	Drug Enforcement Administration
937	DEA	Drug Enforcement Agency
938	DeCA	(U.S.) Defense Commissary Agency
939	DEFCON	Defence readiness condition
940	DELT	Dual Ended Line Test (ing)
941	DEPSECDEF	(U.S.) Deputy Secretary of Defense
942	DERA	British Defence Evaluation and Research Agency (1995-2001)
943	DES	Deep Ecliptic Survey
944	DEU	Germany (ISO 3166 trigram)
945	DFAS	(U.S.) Defense Finance and Accounting Service
946	DFCB	Data Format Control Book
947	DfID	UK Department for International Development
948	DFM	Discrete Field Model see Superluminal motion
949	DFM	Dynamic Flowgraph Methodology
950	DFSP	Dermatofibrosarcoma protuberans
951	DfT	UK Department for Transport
952	DGPS	Differential GPS
953	DGZ	Desired Ground Zero
954	DHA	DocosaHexaenoic Acid
955	DHHS	(U.S.) Department of Health and Human Services
956	DHRA	(U.S.) DoD Human Resources Activity
957	DHS	U.S. Department of Homeland Security
958	DHSS	UK Department of Health and Social Security
959	DHTFYSS	U.S. Don't Have Time For You Silly S****
960	DHY	Dahomey (ISO 3166 trigram; became BEN for Benin in 1977)
961	DIA	U.S. Defense Intelligence Agency
962	DIAC	Department of Immigration and Citizenship (Australia) [1]
963	DiC	Design Island Centre (computing usually used in a teaching situation)
964	DICASS	DIrectional Command Activated Sonobuoy System
965	DIFAR	DIrectional Frequency Analysis and Recording
966	DIME	Dense Inert Metal Explosive
967	DIP	Dual In-line Package (electronics)
968	DIPS	Defense independent pitching statistics
969	DIR	Defence Industrial Research
970	DISCOM	Division Support Command
971	DISE	Deployable Intelligence Support Element
972	DISSTAF	DIS Search and Target Acquisition Fidelity experiment
973	DITY	Do-It-Yourself
974	DIVAD	Division Air Defence
975	DIY	Do It Yourself
976	DJI	Djibouti (ISO 3166 trigram)
977	DK	Denmark (ISO 3166 digram)
978	DL	Dexter's Laboratory
979	DLIC	Detachment Left-In-Contact
980	DLIR	Depot-Level Inspection and Repair
981	DLPMC	DorsoLateral PreMotor Cortex
982	DLRP	Data Link Reference Point
983	DLS	Deep Lens Survey
984	DLSA	(U.S.) Defense Legal Services Agency
985	DLSc	Diploma in Library Science
986	DLTBGYD	Don't let the bastards grind you down
987	DMC	(U.S.) Defense Management Council
988	DMCA	Digital Millennium Copyright Act
989	DMM	Digital Multimeter
990	DMOC	Distributed Mission Operations Centre
991	DMPA	(U.S.) Defense Medical Programs Activity
992	DMPFC	DorsoMedial PreFrontal Cortex
993	DMPK	Drug Metabolism and Pharmacokinetics
994	DMRB	Design Manual for Roads and Bridges
995	DMS	U.S. Defense Message System
996	DMSP	U.S. Defense Meteorological Satellite Program
997	DMT	Dimethyltryptamine
998	DMV	Department of Motor Vehicles
999	DMZ	DeMilitarized Zone
1000	DN	Deacon
1001	DNAW	Day Night All Weather
1002	DNDi	Drugs for Neglected Diseases initiative
1003	DNDO	U.S. Domestic Nuclear Detection Office
1004	DNK	Denmark (ISO 3166 trigram)
1005	DNM	Defence Nuclear Material
1006	DNR	Do Not Resuscitate
1007	DNS	Domain Name System
1008	DOB	Date Of Birth
1009	DOD	U.S. Department of Defense
1010	DODAF	U.S. Department of Defense Architectural Framework
1011	DoDD	U.S. Department of Defense Directive
1012	DoDEA	(U.S.) Department of Defense Education Activity
1013	DOE	U.S. Department of Energy
1014	DOHC	Dual-OverHead-Cam engine
1015	DOI	U.S. Department of the Interior
1016	DORA	Defence of the Realm Act
1017	DOS	Density of State
1018	DOTA	short-form for DEFENSE OF THE ANCIENTS a popular online epic game
1019	DotD	Deal of the Day (marketing gimmick)
1020	DOW	Died of Wounds
1021	DP	Division de production (Algerian petroleum company)
1022	DPA	UK Defence Procurement Agency
1023	DPCO	Double-Pole Change Over
1024	DPDT	Double-Pole Double-Throw
1025	DPI	Dots Per Inch
1026	DPICM	Dual-Purpose Improved Conventional Munition
1027	DPKO	UN Department for Peacekeeping Operations
1028	DPMO	(U.S.) Defense Prisoner of War/Missing Personnel Office
1029	DPPDB	Digital Point Positioning Database
1030	DPRK	Democratic People's Republic of Korea
1031	DPST	Double-Pole Single-Throw
1032	DRC	Democratic Republic of the Congo
1033	DRDC	Defence Research & Development Canada
1034	DREA	Defence Research Establishment Atlantic (obsolete 2002)
1035	DRES	Defence Research Establishment Suffield (obsolete 2002)
1036	DRET	Defence Research Establishment Toronto (obsolete 2002)
1037	DREV	Defence Research Establishment Valcartier (obsolete 2002)
1038	DRIC	(U.S.) Defense Research Information Center
1039	DRMS	(U.S.) Defense Revitalization and Marketing Service
1040	DRPR	Drawing Practices
1041	DRT	Document Related Technologies
1042	Ds	Darmstadtium
1043	DSAS	Disney Sing Along Songs
1044	DSB	(U.S.) Defense Science Board
1045	DSCS	U.S. Defense Satellite Communications System
1046	DSCSOC	DSCS Operations Center
1047	DSE	Dry Sheep Equivalent
1048	DSG	Direct-Shift Gearbox
1049	DSID	Dismounted Soldier Identification System
1050	DSL	Digital Subscriber Line
1051	DSLR	Digital single-lens reflex (camera)
1052	DSM	Diagnostic and Statistical Manual of Mental Disorders
1053	DSN	Deep Space Network
1054	DSPL	Design Specialists and Plans Language
1055	DSR	Deformed Special Relativity
1056	DST	Daylight Saving Time
1057	DSTL	British Defence Science and Technology Laboratory
1058	DSWA	(U.S.) Defense Special Weapons Agency
1059	DTA	Dental Technologists Association
1060	DTD	Digital Terrain Data
1061	DTG	Date-Time Group
1062	DTH	Direct To Home (television)
1063	DTI	UK Department of Trade and Industry
1064	DTIC	(U.S.) Defense Technical Information Center
1065	DTL	Diode-Transistor Logic (electronics)
1066	DTMF	Dual-tone multi-frequency signaling
1067	DTO	Disruptive Technology Office (was ARDA)
1068	DTR	Determine The Relationship
1069	DTSA	(U.S.) Defense Technology Security Administration
1070	DUMBO	Down Under the Manhattan Bridge Overpass (Brooklyn neighborhood)
1071	DUSD	(U.S.) Deputy Under-Secretary of Defense
1072	DVLC	UK Driver and Vehicle Licencing Centre
1073	DVM	Doctor of Veterinary Medicine
1074	DVO	Direct View Optics
1075	DVOM	Digital Volt-Ohm Meter
1076	DVP	various meanings (disambiguation page)
1077	DW	Drum Workshop
1078	DWIM	Do What I Mean
1079	DWM	Doctor Who Magazine
1080	DWTS	Dancing with the Stars
1081	DWW	Down with Webster
1082	DXA	Dual-energy X-ray Absorptiometry
1083	DXM	DeXtroMethorphan
1084	DY	Dahomey (ISO 3166 digram; obsolete since 1977)
1085	Dy	Dysprosium
1086	DZA	Algeria (ISO 3166 trigram)
1087	E	East
1088	EABU	Explain Acronyms Before Use
1089	EAC	Echelons Above Corps
1090	EAPC	Euro-Atlantic Partnership Council
1091	EAST	Experimental Advanced Superconducting Tokamak
1092	EBD	Electronic Brake Distribution
1093	EBE	Extraterrestrial Biological Entity
1094	EBSA	Employee Benefits Security Administration
1095	EBW	Electron Beam Welding
1096	EBW	Exploding BridgeWire
1097	ECASS	European Centre for Analysis in the Social Sciences [1]
1098	ECBR	European Coalition for Biomedical Research
1099	ECCM	Electronic Counter-Counter-Measures
1100	ECFS	Electronic Case Filing System
1101	ECG	Electrocardiogram
1102	ECHR	European Convention on Human Rights
1103	ECJ	European Court of Justice
1104	ECL	Emitter Coupled Logic (electronics)
1105	ECommHR	European Commission on Human Rights
1106	ECSC	European Coal and Steel Community (distant ancestor of the EU)
1107	ECT	ElectroConvulsive Therapy
1108	ECtHR	European Court of Human Rights
1109	EDA	European Defence Agency
1110	EDAC	Error Detection And Correction
1111	EDCS	Environmental Data Coding Specification
1112	EDH	Eastman Dental Hospital
1113	EDSA	Epifanio de los Santos Avenue (a major thoroughfare in Manila with great significance to post-1980 Philippines history)
1114	EDT	Eastern Daylight Saving Time (UTC−4 hours)
1115	EEC	European Economic Community (predecessor of the EU)
1116	EEG	ElectroEncephaloGram
1117	EENT	End Evening Nautical Twilight
1118	EEO	Equal Employment Opportunity
1119	EEOC	(U.S.) Equal Employment Opportunity Commission
1120	EEZ	Economic Exclusion Zone or Exclusive Economic Zone
1121	EFF	Electronic Frontier Foundation
1122	EFL	English as a Foreign Language
1123	EFM	Enterprise Feedback Management
1124	EFOA	European Fuel Oxygenates Association
1125	EFSA	European Food Safety Authority
1126	EFT	Electronic Fund Transfer
1127	EFV	Expeditionary Fighting Vehicle
1128	EG	Egypt (ISO 3166 digram; FIPS 10-4 country code)
1129	EGCG	EpiGalloCatechin-3-Gallate
1130	EGIS	Erieye Ground Interface Segment
1131	EGRET	Energetic Gamma-Ray Experiment Telescope
1132	EGY	Egypt (ISO 3166 trigram)
1133	EHF	Extremely High Frequency
1134	EHR	Equipment History Record
1135	Ei	Exbi
1136	EI	Ireland (FIPS 10-4 country code; from Éire)
1137	EIA	Environmental Impact Assessment
1138	EIAH	Encyclopedia of Iranian Architectural History
1139	EIAH	Environnements Informatiques pour l'Apprentissage Humain
1140	EIC	East India Company
1141	EICS	East India Company's Service
1142	eID	electronic ID
1143	EIRP	Effective Isotropic Radiated Power
1144	EIS	Environmental Impact Statement
1145	EJ	Exajoule
1146	EKG	Electrocardiogram (from German Elektrokardiogramm)
1147	EKMS	Electronic Key Management System
1148	EL	Exalitre
1149	ELINT	Electronic Intelligence
1150	ELL	English Language Learner
1151	ELM	Edge-Localised Mode (plasma physics)
1152	ELO	Electric Light Orchestra
1153	ELSS	Emergency Life Support Stores
1154	EM	ElectroMagnetism/ElectroMagnetic
1155	Em	Exametre
1156	EMA	European Medicines Agency
1157	EMCON	(Electromagnetic) Emissions Control
1158	EMDG	Euro-Missile Dynamics Group
1159	EMDR	Eye Movement Desensitisation and Reprocessing
1160	EMEA	Europe,Middle East and Africa
1161	EMG	ElectroMyoGraph
1162	EMP	ElectroMagnetic Pulse
1163	EMS	Emergency Medical Services
1164	EMT	Emergency Medical Technician
1165	ENCODE	Encyclopedia of DNA Elements (human genome data project)
1166	ENE	East North-East
1167	ENG	England (FIFA trigram; not eligible for an ISO 3166 or IOC trigram)
1168	ENTEC	Euro NATO Training Engineer Centre
1169	ENVL	Envelope
1170	ENY	Enemy
1171	EOD	Explosive Ordnance Disposal
1172	EOG	ElectroOculoGraphy
1173	EOM	End of Message
1174	EOSAT	Earth Observation Satellite
1175	EOSDIS	Earth Observation Satellite Data and Information System
1176	EP	European Parliament
1177	EP	Extended play
1178	EPCOT	Experimental Prototype Community Of Tomorrow
1179	EPGS	EOS Polar Ground Sites
1180	EPIRB	Emergency Position Indicating Radio Beacon
1181	EPL	English Premier League
1182	EPOS	Electronic Point Of Sale
1183	EPPA	Employee Polygraph Protection Act
1184	EPR	European Pressurised [Nuclear] Reactor
1185	EQ	Emotional Quotient
1186	Er	Erbium
1187	ERCIM	European Research Consortium for Informatics and Mathematics
1188	ERI	Eritrea (ISO 3166 trigram)
1189	ERLAWS	Eastern Ruapehu Lahar Alarm and Warning System
1190	EROS	Earth Resources Observation System
1191	ERP	Engineer Regulating Point
1192	ERR	Eesti Rahvusringhääling
1193	ERS	Earth Resources Survey
1194	ERTS	Earth Resources Technology Satellite (became Landsat)
1195	ERV	Endogenous RetroVirus
1196	ESD	ElectroStatic Discharge
1197	ESDP	European Security and Defence Policy
1198	ESE	East South-East
1199	ESH	Western Sahara (ISO 3166 trigram)
1200	ESL	English as a Second Language
1201	ESM	Electronic warfare Support Measures
1202	ESO	European Southern Observatory
1203	ESOL	English for Speakers of Other Languages
1204	ESPN	Entertainment and Sports Programming Network
1205	ESU	Emergency Services Unit
1206	ESV	Engineer Support Vehicle
1207	ET	Ethiopia (ISO 3166 digram; FIPS 10-4 country code)
1208	ETH	Ethiopia (ISO 3166 trigram)
1209	ETI	Extra-Terrestrial Intelligence
1210	ETLA	Extended TLA
1211	ETT	Embedded Training Team
1212	Eu	Europium
1213	EUCOM	(U.S.) European Command
1214	EUUSA	European Union and United States of America
1215	EV	Exavolt
1216	EVIL	Electronic viewfinder (with) interchangeable lens (a type of digital camera)
1217	EWTN	Eternal Word Television Network
1218	Exatesla	Extra Terrestrial
1219	EXREP	Expeditious Repair (SM&R code)
1220	f	Femto
1221	fA	Femtoampere
1222	FA	Food Addicts in Recovery Anonymous
1223	FAA	Financial Aid Administrator,Fleet Air Arm,Functional Area Analysis
1224	FAAD	Forward Area Air Defence
1225	FAADEZ	Forward Area Air Defence Engagement Zone
1226	FAAFP	Fellow of the American Academy of Family Physicians
1227	FAAN	Fellow of the American Academy of Neurology
1228	FAAN	Fellow of the American Academy of Nursing
1229	FAAQ	Frequently Asked and Anticipated Questions
1230	FAASV	Field Artillery Ammunition Supply Vehicle
1231	FAB	Feline Advisory Bureau (UK feline charity)
1232	FACA	(US) Federal Advisory Committee Act
1233	FACH	Fuerza Aérea de Chile
1234	FACN	Fellow of the American College of Nutrition
1235	FACP	Fellow of the American College of Physicians
1236	FACTS	Flexible Alternating Current Transmission System
1237	FAM	Foreign Affairs Manual
1238	FAO	Food and Agriculture Organization
1239	FAPA	Fellow of the American Psychological Association
1240	FAPHA	Fellow of the American Public Health Association
1241	FARP	Forward Arming and Refuelling Point / Forward Area Rearm/refuel Point
1242	FASCAM	Family of Scatterable Mines[1]
1243	FASD	Fetal Alcohol Spectrum Disorder
1244	FASEB	Federation of American Societies for Experimental Biology
1245	FAT	Field Artillery Tractor
1246	FAVS	Future Armoured Vehicle System
1247	FAW	Football Association of Wales
1248	FBCS	Fellow of the British Computer Society
1249	FBIDST	Fellow of the British Institute of Dental and Surgical Technologists
1250	FBIS	Foreign Broadcast Information Service
1251	FBM	Board foot
1252	fC	Femtocoulomb
1253	FCC	U.S. Federal Communications Commission
1254	FCE	First Certificate in English
1255	FCF	Financial Free Cash Flow
1256	FCLA	Fraud Claims Law Associate
1257	FCO	UK Foreign and Commonwealth Office
1258	FCW	Florida Championship Wrestling
1259	FD	Falun Dafa
1260	FDA	Food and Drug Administration (U.S.)
1261	FDBK	(I) Feedback
1262	Fe	Iron (Latin Ferrum)
1263	FEAST	Forum for European-Australian Science and Technology Cooperation
1264	FEATS	Festival of European Anglophone Theatrical Societies link title
1265	FEBA	Forward Edge of the Battle Area
1266	FED	Field Emission Display
1267	FEDEP	Federation Development Process (Simulation)
1268	FEF	Frontal Eye Field (neurophysiology)
1269	FEMA	Farm Equipment Manufacturers Association, U.S. Federal Emergency Management Agency,Fire Equipment Manufacturers' Association
1270	FENS	Federation of European Neuroscience Societies
1271	FES	Flywheel Energy Storage
1272	FEST	Frankfurt English Speaking Theatre link title
1273	FET	Field-effect transistor
1274	FEZ	Fighter Engagement Zone
1275	fF	Femtofarad
1276	FF	Final Fantasy
1277	FFB	Frum From Birth (referring to an observant Jew born into a religiously observant family)
1278	FFC	Free For Chat
1279	FFE	Fukuoka Futures Exchange
1280	FFF	Fédération française de football (French for: French Football Federation)
1281	FFG	Guided Missile Frigate (hull classification symbol)
1282	FFOV	Forward Field Of View
1283	FFR	Fédération française de rugby (French for: French Rugby (Union) Federation)
1284	FFS	For Fuck's Sake
1285	FFT	Final Fantasy Tactics
1286	FG	Falun Gong
1287	fg	Femtogram
1288	FG	Fog (METAR Code), French Guiana (FIPS 10-4 territory code)
1289	FGOTUS	First Gentleman of the United States
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	FIAT	Fabbrica Italiana Automobili Torino (Italian for: Italian Car Factory of Turin)
1296	FIB	Fucking Illinois Bastard (Wisconsin slang, variants exist)
1297	FIBUA	Fighting In Built-Up Areas
1298	FIC	Fellowship for Intentional Community
1299	FID	Foreign Internal Defence
1300	FIE	Fly-In Echelon
1301	FIFA	Fédération internationale de football association (French for: International Association Football Federation)
1302	FIFe	Fédération internationale féline (French for: International Feline Federation)
1303	FIFO	First In, First Out
1304	FIFRA	Federal Insecticide, Fungicide, and Rodenticide Act
1305	FIGJAM	Fuck I'm Good, Just Ask Me
1306	FIMPT	Fellow of the Institute of Maxillofacial Prosthetists and Technologists
1307	FIN	Finland (ISO 3166 trigram)
1308	FINA	Fédération internationale de natation (French for: International Swimming Federation)
1309	FIRES	Fever Induced Refractory Epilepsy Syndrome or Febrile Infection-Related Epilepsy Syndrome
1310	FIS	Fédération internationale de ski (French for: International Ski Federation)
1311	FISA	Fédération Internationale des Sociétés d'Aviron (French for: International Federation of Rowing Associations)
1312	FISH	Fluorescence In-Situ Hybridisation
1313	FiST	Fire Support Team
1314	FITS	Flexible Image Transport System
1315	FIU	Florida International University
1316	fJ	Femtojoule
1317	FJ	Fiji (ISO 3166 digram; FIPS 10-4 country code)
1318	FJI	Fiji (ISO 3166 trigram)
1319	FJN	Financial Job Network
1320	FK	Falkland Islands (ISO 3166 digram; FIPS 10-4 territory code)
1321	fK	Femtokelvin
1322	FKSM	Fort Knox Supplemental Manual
1323	FKT	Fastest Known Time
1324	fL	Femtolitre
1325	FL	Florida (postal symbol)
1326	fl	floruit (Latin for: living) (genealogy)
1327	FLA	Florida,Front Line Assembly,Future Large Aircraft
1328	FLAB	Four-letter abbreviation
1329	FLAC	Free Legal Advice Centres
1330	FLAC	Free Lossless Audio Codec
1331	FLAK	Flug-Abwehr-Kanone (German for: Anti-Aircraft Guns)
1332	FLB	Forward Logistics Base
1333	FLET	Forward Line of Enemy Troops
1334	FLG	Falun Gong
1335	FLIP	Flight Information Publication
1336	FLIR	Forward Looking InfraRed (sensor)
1337	FLK	Falkland Islands (ISO 3166 trigram)
1338	FLOT	Forward Line of Own Troops
1339	FLOTUS	First Lady of the United States (the wife of the President of the United States)
1340	FLQ	Free Legal Questions
1341	FLQ	Front de libération du Québec (French for: Québec Liberation Front)
1342	FLSA	Fair Labor Standards Act
1343	FLTSAT	Fleet Satellite
1344	FLTSATCOM	Fleet Satellite Communication System
1345	FLUBOS	Fat, Lazy, Useless, Bag Of Shit
1346	FM	Factory Mutual
1347	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)
1348	fm	Femtometre
1349	Fm	Fermium
1350	FMC	Federal Magistrates' Court (an Australian federal court,formerly FMS),Food Machinery Corporation (original name of the company now known as FMC Corporation)
1351	FMCA	Federal Magistrates' Court of Australia (used for citing decisions of the FMC other than family law decisions)
1352	FMCAfam	Federal Magistrates' Court of Australia: family (used for citing family law decisions of the FMC)
1353	FMCG	Fast Moving Consumer Goods
1354	FME	Formal Methods Europe
1355	FMECA	Failure Modes and Effect Criticality Analysis
1356	FMJD	Fédération Mondiale du Jeu de Dames
1357	FMLA	Family Medical Leave Act
1358	FoE	Friends of the Earth
1359	FOGC	Federal Oil and Gas Council
1360	FOH	Front Of House
1361	FOIA	Freedom of Information Act
1362	FOM	Federation Object Model
1363	FONSI	Finding of No Significant Impact
1364	FOO	Forward Observation Officer
1365	FOOP	Friends Of Organ Pipes (Volunteer group)
1366	FoS	Family of Systems
1367	FOSE	Fallout 3 Script Extender
1368	FOSE	Federal Office Systems Expo
1369	FOT	Free on truck
1370	FOTA	Fellow of the Orthodontic Technicians Association
1371	FOTC	Flight of the Conchords
1372	FOUO	For Official Use Only
1373	FP	French Polynesia (FIPS 10-4 territory code)
1374	FPF	Federação Portuguesa de Futebol (Portuguese for: Portuguese Football Federation), Final Protective Fire
1375	FPS	Fire Prevention System
1376	FQ	Baker Island (FIPS 10-4 territory code),French Southern and Antarctic Territories (ISO 3166 digram; obsolete 1979)
1377	FR	France (FIPS 10-4 country code; ISO 3166 digram)
1378	Fr	Francium
1379	FRA	Federal Railroad Administration, France (ISO 3166 trigram)
1380	FRAND	Fair,reasonable,and non-discriminatory (concept in standards-setting and intellectual property law)
1381	FRCP	Federal Rules of Civil Procedure,Fellow of the Royal College of Physicians
1382	FRICBM	Full Range ICBM
1383	FRO	Faroe Islands (ISO 3166 trigram)
1384	FRS	Fellow of the Royal Society, U.S. Federal Reserve System
1385	FRSA	Fellow of the Royal Society of Art
1386	FRY	Federal Republic of Yugoslavia
1387	fs	Femtosecond
1388	fS	Femtosiemens
1389	FSA	Fire Support Area, UK Food Standards Agency, Functional Solution Analysis
1390	FSC	Federal Supply Classification, Forest Stewardship Council (ecological pressure group)
1391	FSCL	Fire Support Co-ordination Line
1392	FSE	Fire Support Element
1393	FSF	Free Software Foundation
1394	FSH	Follicle Stimulating Hormone
1395	FSI	Fuel Stratified Injection
1396	FSS	Fire Support Station
1397	FSSP	Families of Structurally Similar Proteins
1398	FSTC	Foreign Science Technology Center (now NGIC)
1399	fT	Femtotesla
1400	FTC	Federal Trade Commission
1401	FTE	Full Time Equivalent
1402	FTL	Faster Than Light
1403	FTS	Flight Termination System used during some rocket launches
1404	FTS	Fuck That Shit
1405	FU	Smoke (METAR Code)
1406	FUBAR	Fucked/Fouled Up Beyond All Recognition/Repair
1407	fV	Femtovolt
1408	fW	Femtowatt
1409	FW	Forward
1410	FWC	Football World Cup
1411	FWF	Fixed Word Format
1412	FWI	French West Indies
1413	FWIW	For What It's Worth
1414	FWS	U.S. Fish and Wildlife Service
1415	FWT	Fresh Water Tank
1416	FXX	Metropolitan France (ISO 3166 trigram; obsolete 1997)
1417	FYA	For Your Agenda
1418	FYDP	Five-Year Defense Plan (U.S.)
1419	FYI	For Your Information
1420	FYROM	Former Yugoslav Republic of Macedonia
1421	FZDZ	Freezing Drizzle (METAR Code)
1422	FZFG	Freezing Fog (METAR Code)
1423	FZRA	Freezing Rain (METAR Code)
1424	g	Gram
1425	G3	Heckler & Koch G3
1426	GAAR	General Anti-Avoidance Rule (tax evasion)
1427	GAB	Gabon (ISO 3166 trigram)
1428	GABA	Gamma-AminoButyric Acid
1429	GAD	Generalized Anxiety Disorder
1430	GAF	Garfield and Friends
1431	GAO	U.S. Government Accountability Office
1432	GAW	Global Atmospheric Watch
1433	GBBC	Great (Global) Backyard Bird Count
1434	GBE	Knight/Dame Grand Cross of the Order of the British Empire
1435	GBR	United Kingdom of Great Britain and Northern Ireland (ISO 3166 trigram)
1436	GCA	Graduate in Claims Administration
1437	GCD	see entry
1438	GCF	Greatest Common Factor
1439	GCI	Ground-controlled interception
1440	GCN	Gamma-ray burst Coordination Network
1441	GCS	Global Coordinate System
1442	GCSE	General Certificate of Secondary Education (UK)
1443	Gd	Gadolinium
1444	GD	Grenada (ISO 3166 digram)
1445	GDL	Game Definition Language
1446	GDR	General Distribution Release (Microsoft Term for a software service release; between Hotfix and Service Pack)
1447	GDR	German Democratic Republic (cf. DDR)
1448	GDW	Game Designers Workshop
1449	Ge	Germanium
1450	GEBCO	General Bathymetric Chart of the Oceans
1451	GEC	Great Engineering Challenge
1452	GED	General Educational Development (high school equivalency credential in the U.S. and Canada)
1453	GEEP	Geophysical Equipment Exploration Platform
1454	GEN	Full General (four stars) in the U.S. Army
1455	GeV	Gigaelectron-volt
1456	GEV	Ground Effect Vehicle
1457	GFCI	Ground Fault Circuit Interruptor (aka GFI)
1458	GFI	Ground Fault Interruptor (aka GFCI)
1459	GFL	German Football League (Germany's Bundesliga for American football; the English-language name is used in German without translation)
1460	GFN	Global Footprint Network
1461	GG	Georgia (FIPS 10-4 country code)
1462	GGK	Good God Karma
1463	GHA	Ghana (ISO 3166 trigram)
1464	GHB	gamma-Hydroxybutyric acid
1465	Gi	Gibi
1466	GIB	Gibraltar (ISO 3166 trigram)
1467	GIG	Global Information Grid
1468	GINO	Godzilla In Name Only
1469	GISS	General Impression of Size and Shape,Goddard Institute for Space Studies
1470	GJD	Geocentric Julian Day
1471	GLAAD	Gay and Lesbian Alliance Against Defamation
1472	GLAC	General Ledger Accounting Code
1473	GLAST	Gamma-ray Large Area Space Telescope
1474	GLBA	Gramm-Leach-Bliley Act
1475	GLC	Gas-liquid chromatography
1476	GLP	Guadeloupe (ISO 3166 trigram)
1477	GLV	Gained Life Value
1478	Gm	Gigametre
1479	GM	The Gambia (ISO 3166 digram),GameMaster (role-playing),General Motors,Genetically Modified,Germany (FIPS 10-4 country code),Guru Meditation (computing)
1480	GMAC	General Motors Acceptance Corporation,the original name of the company now known as Ally Financial,Graduate Management Admission Council,G-MAC,Great Midwest Athletic Conference
1481	GMB	The Gambia (ISO 3166 trigram),General,Municipal,Boilermakers (and Allied Trade Union)
1482	GMFSC	Ground Mobile Forces Satellite Communications
1483	GMO	Genetically Modified Organism
1484	GMPCS	Global Mobile Personal Communications by Satellite
1485	GNAS	Grand National Archery Society
1486	GNB	Guinea-Bissau (ISO 3166 trigram)
1487	GNP	Gross National Product
1488	GNQ	Equatorial Guinea (ISO 3166 trigram)
1489	GnRH	Gonadotropin-Releasing Hormone
1490	GO	Glorioso Islands (FIPS 10-4 territory code)
1491	GOA	General of the Army (United States only)
1492	GOAT	Greatest Of All Time
1493	GOC	General Officer Commanding
1494	GOES	Geostationary Operational Environmental Satellite
1495	GOP	Grand Old Party
1496	gorp	granola,oats,raisins,peanuts (another name for trail mix),probably a backronym
1497	GOSC	General Officer Steering Committee
1498	GOSH	Great Ormond Street Hospital
1499	GOSP	Gas/Oil Separation Plant
1500	GOTS	Government off-the-shelf
1501	GOYADIN	Get Off Your Arse,Do It Now (anti-procrastination mantra)
1502	GP	General Practitioner,General Purpose,Grand Prix,Guadeloupe (ISO 3166 digram; FIPS 10-4 territory code)
1503	GPA	Grade Point Average
1504	GPC	Global Path Cache
1505	GPIB	General-Purpose Instrumentation/Interface Bus
1506	GPO	General Post Office
1507	GPPC	Genetics and Public Policy Center
1508	GPR	Ground-Penetrating Radar
1509	GPS	General Problem Solver,Global Positioning System
1510	GPT	General Purpose Technology, Get paid to surf (an online business model)
1511	GQ	Equatorial Guinea (ISO 3166 digram),Gentlemen's Quarterly (the original name of the magazine now known simply as GQ),Guam (FIPS 10-4 territory code),GR[edit]
1512	GR	Greece (FIPS 10-4 country code; ISO 3166 digram),Hail (METAR Code)
1513	GRAIL	Gravity Recovery and Interior Laboratory
1514	GRAS	Generally recognized as safe (FDA list)
1515	GRB	Gamma-Ray Burst
1516	GRC	Greece (ISO 3166 trigram)
1517	GRD	Grenada (ISO 3166 trigram)
1518	GRE	Graduate Record Examination,Greece (IOC and FIFA trigram,but not ISO 3166)
1519	grep	[search] Globally for Regular Expression,Print [lines]
1520	GRID	Gay-Related Immune Deficiency (original name of AIDS)
1521	GRid	Global Release Identifier,a music industry identifier from the RIAA and IFPI
1522	GriT	Girl raised in Texas (Woman presenting firm southern traits/beliefs)
1523	GRL	Greenland (ISO 3166 trigram)
1524	GRN	Grenada (IOC and FIFA trigram,but not ISO 3166),Goods Received Note
1525	Gs	Gigasecond
1526	GSA	U.S. General Services Administration
1527	GSD	Graphical Situation Display
1528	GSGB	(God send glamour boy 9-10/10)
1529	GSK	GlaxoSmithKline [good sexual karma]
1530	GSN	Game Show Network
1531	GSO	General Services Officer (U.S. Department of State)
1532	GSOH	Good Sense Of Humour
1533	GSP	Georges St-Pierre (Canadian MMA fighter)
1534	GSR	Gun Shot Residue
1535	GSS	Generic Security Services
1536	GSW	Gunshot wound
1537	GTD	Getting Things Done
1538	GTG	Got To Go (Internet chat)
1539	GTGN	Getty Thesaurus of Geographic Names
1540	GTK	Good To Know (Internet chat)
1541	GTM	Guatemala (ISO 3166 trigram)
1542	GU	Guam (postal symbol; ISO 3166 digram)
1543	GUF	French Guiana (ISO 3166 trigram)
1544	GUILT	Gangliated Utrophin Immuno Latency Toxin
1545	GULCR	Grupo de Usuarios de Linux de Costa Rica
1546	GUT	Grand Unification Theory
1547	GWARS	Ground Warfare System (simulation)
1548	GWAS	Grand Western Archery Society
1549	GWOT	Global War on Terrorism
1550	GXE	Gene-enivronment interaction
1551	GXM	Matrox Graphics eXpansion Module
1552	GY	Guyana (FIPS 10-4 country code; ISO 3166 digram)
1553	GZK	Greisen-Zatsepin-Kuzmin cut-off (cosmic ray energies)
1554	h	Hecto
1555	HAARP	High Frequency Active Auroral Research Program
1556	HAART	Highly Active Anti-Retroviral Therapy
1557	HAI	Human Awareness Institute
1558	HAL	Hardware Abstraction Layer
1559	HALO	High Altitude Low Opening (parachute jump)
1560	HAM	Amateur radio operator
1561	HANS	Head And Neck Support (device used in many race cars)
1562	HARM	High-speed Anti-Radiation Missile
1563	HAW	Heavy Antitank Weapon
1564	HAWK	Homing All the Way Killer (air defence system)
1565	HAZ	Heat-Affected Zone
1566	HAZMAT	Hazardous Materials
1567	HBCD	HexaBromoCycloDodecane
1568	HBO	Home Box Office
1569	HBR	Harvard Business Review
1570	HBT	Heterojunction Bipolar Transistor
1571	HBV	Hepatitis B Virus
1572	HCCI	Homogeneous Charge Compression Ignition
1573	HCF	Highest Common Factor
1574	HCSC	Higher Command and Staff Course
1575	HDL	High-Density Lipoprotein
1576	HDM	Human Decision-Making
1577	HDRA	Henry Doubleday Research Association
1578	He	Helium
1579	HE	High Explosive
1580	HEAT	High Explosive Anti-Tank (ammunition)
1581	HEBA	Hellenic Basketball Clubs Association
1582	HEER	High-Explosive Extended Range (ammunition)
1583	HEIC	Honourable East India Company
1584	HEMP	High-Altitude Electromagnetic Pulse
1585	HEOSS	High Earth Orbit Space Surveillance
1586	HEP	High-Explosive Plastic (ammunition)
1587	HEPA	High-Efficiency Particulate Air (filter)
1588	HESV	Heavy Engineering Support Vehicle
1589	HETT	Heavy Equipment Transporting Truck / Heavy Equipment Truck Tractor
1590	HEU	Highly Enriched Uranium
1591	Hf	Hafnium
1592	HF	High Frequency
1593	HFE	Human Fertilisation and Embryology (UK Act)
1594	HFE	The common-emitter current gain in a BJT transistor (also represented by βF). See: BJT
1595	HFEA	Human Fertilisation and Embryology Authority (UK)
1596	Hg	Mercury (Latin Hydrargyrum)
1597	HGC	UK Human Genetics Commission
1598	HGF	Human Growth Factor
1599	HGTV	Home & Garden Television
1600	HI	Hawaii (postal symbol)
1601	HIH	His (or Her) Imperial Highness
1602	HIM	His (or Her) Imperial Majesty
1603	HIMAD	High to Medium Altitude Air Defence (see also H/MAD)
1604	HIMEZ	High Altitude Missile Engagement Zone
1605	HIMYM	How I Met Your Mother
1606	HIPAA	U.S. Health Insurance Portability and Accountability Act
1607	Hipparcos	HIgh Precision Parallax COllecting Satellite
1608	Hird	Hurd of interfaces representing depth (cf. HURD)
1609	HiRISE	High Resolution Imaging Science Experiment
1610	HIT	Health Information Technology
1611	HIV	Human Immunodeficiency Virus
1612	HIWT	Hobart Institute of Welding Technology
1613	HJD	Heliocentric Julian Day
1614	HK	Hong Kong (ISO 3166 digram; FIPS 10-4 territory code)
1615	HKG	Hong Kong (ISO 3166 trigram)
1616	HKS	HyperKinetic Syndrome
1617	hL	Hectolitre
1618	HL	Holding Line
1619	HLL	High-Level Language
1620	HLN	Headline News
1621	HLOS	High Level Output Specification
1622	HM	Heard Island and McDonald Islands (ISO 3166 digram; FIPS 10-4 territory code)
1623	HMCE	Her/His Majesty's Customs and Excise (former UK government department; succeeded by HM Revenue and Customs)
1624	HMD	Heard and McDonald Islands (ISO 3166 trigram)
1625	HMF	HydroxyMethyl Furfural
1626	HMO	Health maintenance organization
1627	HMP	Her Majesty's Prison
1628	HMRC	Her/His Majesty's Revenue and Customs
1629	HMSO	Her Majesty's Stationery Office
1630	HMV	His Master's Voice
1631	HN	Honduras (ISO 3166 digram)
1632	HND	Honduras (ISO 3166 trigram)
1633	Ho	Holmium
1634	HO	Honduras (FIPS 10-4 country code)
1635	HOLLAND	Hope Our Love Lasts And Never Dies
1636	HOSTAC	Helicopter Operations from Ships Other Than Aircraft Carriers
1637	HOT	Highly Optimised Tolerance
1638	HOTAS	Hands on throttle-and-stick
1639	HOV	High Occupancy Vehicle
1640	hp	horse power
1641	HPA	UK Health Protection Agency
1642	HPCL	Hindustan Petroleum Corporation Limited
1643	HPLC	High Performance Liquid Chromatography
1644	HPT	High[er] Payoff Target
1645	HPV	Human Papilloma Virus
1646	HRBL	High-level Representation of Behavior Language (original name of the Herbal language)
1647	HRD	Human Resource Development
1648	HRF	High iness Forces
1649	HRH	His (or Her) Royal Highness
1650	HRM	His (or Her) Royal Majesty
1651	HRM	Human Resource Management
1652	HRT	Hormone Replacement Therapy
1653	Hs	Hassium
1654	HSBC	The Hong Kong and Shanghai Banking Corporation
1655	HSC	Higher School Certificate
1656	HSM	High School Musical
1657	HSMAD	Human Science/Modeling and Analysis Data
1658	HSN	Home Shopping Network
1659	HSPH	Harvard School of Public Health
1660	HSSI	High-Speed Serial Interface
1661	HST	see entry
1662	HTA	HyperText Application
1663	HTFU	Harden The Fuck Up
1664	HTH	Hope That Helps
1665	HTI	Haiti (ISO 3166 trigram)
1666	HTML	HyperText Markup Language
1667	HTR	Heated Towel Rail
1668	HTS	High-Temperature Superconducting wire
1669	HTTP	HyperText Transfer Protocol
1670	HU	Hungary (ISO 3166 digram; FIPS 10-4 country code)
1671	HUHA	Head up his/her ass (Marine salute; probably a backcronym)
1672	HUN	Hungary (ISO 3166 trigram)
1673	HURD	Hird of Unix-Replacing Daemons (cf. Hird)
1674	HV	Upper Volta (ISO 3166 digram; obsolete 1984)
1675	HVAP	High Velocity Armour Piercing (ammunition)
1676	HVHF	High velocity human factors
1677	HVM	High Velocity Missile
1678	HVO	Upper Volta (ISO 3166 trigram; obsolete 1984)
1679	HWM	Hardware morphing (computer graphics rendering)
1680	HXB	The glycoprotein Tenascian C
1681	HZ	Haze (METAR Code)
1682	Hz	Hertz
1683	IA	Iowa (postal symbol)
1684	IAAL	I Am A Lawyer
1685	IAB	International Association for Biologicals
1686	IAD	Ion Assisted Deposition
1687	IADS	Integrated Air Defence System
1688	IAEA	International Atomic Energy Agency
1689	IAF	{i} Industrial Areas Foundation
1690	IAFG	Information Assurance Focus Group
1691	IANA	Internet Assigned Numbers Authority
1692	IANAL	I Am Not A Lawyer
1693	IAS	Image Assessment System
1694	IASIP	It's Always Sunny in Philadelphia
1695	IATA	International Air Transport Association
1696	IATF	International Automotive Task Force
1697	IATSE	International Alliance of Theatrical Stage Employees
1698	IAUC	International Astronomical Union Circular
1699	IAW	In Accordance With
1700	IB	International Baccalaureate
1701	IBA	Important Bird Area
1702	IBD	Inflammatory Bowel Disease
1703	IBDM	Information Based Decision Making
1704	IBM	International Business Machines
1705	IBRD	International Bank for Reconstruction and Development (part of the World Bank)
1706	IBS	Irritable Bowel Syndrome
1707	ICANN	Internet Corporation for Assigned Names and Numbers
1708	ICAO	International Civil Aviation Organization
1709	ICBM	Intercontinental Ballistic Missile
1710	ICBN	International Code of Botanical Nomenclature
1711	ICE	In case of emergency
1712	ICES	International Council for the Exploration of the Sea
1713	ICF	Intelligent Community Forum
1714	ICMP	Internet Control Message Protocol
1715	ICNAF	International Commission for the Northwest Atlantic Fisheries (became NAFO in 1978)
1716	ICO	Intermediate Circular Orbit
1717	ICPE	International Conference on Pharmacoepidemiology,the annual conference of the International Society for Pharmacoepidemiology
1718	ICRAF	International Centre for Research in Agroforestry (a.k.a. World Agroforestry Centre since 2002)
1719	ICRISAT	International Crops Research Institute for the Semi-Arid Tropics
1720	ICRL	Individual Component Repair List
1721	ICRS	International Celestial Reference System
1722	ICSI	Intracytoplasmic Sperm Injection
1723	ICT	Information and communication technologies
1724	ICTH	Island Closest to Heaven/Hell Final Fantasy VIII
1725	ICV	Infantry Carrier Vehicle
1726	ICYMI	In Case You Missed It
1727	IDC	International Data Corporation
1728	IDDI	I don't do initialisms (see irony)
1729	IDGAF	I don't give a fuck
1730	IDK	I don't know
1731	IDL	Interface Definition Language
1732	IDN	Indonesia (ISO 3166 trigram)
1733	IEA	International Energy Agency
1734	IEC	International Electrotechnical Commission
1735	IED	Improvised Explosive Device
1736	IELTS	International English Language Testing System
1737	IER	Information Exchange Requirement
1738	IET	Initial Entry Training
1739	IET	Institution of Engineering and Technology
1740	IETF	Internet Engineering Task Force
1741	IEW	Intelligence and Electronic Warfare
1742	IFAB	International Football Association Board
1743	IFAH	International Federation for Animal Health
1744	IFAP	International Federation of Agricultural Producers
1745	IFO	Identified Flying Object (see also UFO)
1746	IFOV	Instantaneous Field of View
1747	IFPI	International Federation of Phonographic Industries
1748	IFRB	International Frequency Registration Board
1749	IFV	Infantry Fighting Vehicle
1750	IG	Inspector General
1751	IGNOU	Indira Gandhi National Open University
1752	IGS	International Ground Station
1753	IHH	Idiopathic Hypogonadotropic Hypogonadism
1754	IHO	International Hydrographic Organization
1755	IHR	Institute for Historical Review
1756	IHSI	Institutum Historicum Societatis Iesu (Jesuit Historical Institute)
1757	II	Two (in Roman numerals)
1758	IICA	Inter-American Institute for Cooperation on Agriculture
1759	IIE	Innovative Interstellar Explorer
1760	III	Three (in Roman numerals)
1761	IIRC	If I Recall/Remember Correctly
1762	IISS	International Institute for Strategic Studies
1763	IJN	Imperial Japanese Navy (World War II)
1764	IJWP	Interim Joint Warfare Publication
1765	ILDS	Improved Landmine Detection System
1766	ILO	International Labour Organization
1767	ILRI	International Livestock Research Institute
1768	ILY	I Love You [pronounced ILL-LEE]
1769	IMBD	International Migratory Bird Day
1770	IMDb	Internet Movie Database
1771	IME	In My Experience
1772	IMHO	In My Humble/Honest Opinion
1773	IML	International Mister Leather
1774	IMNSHO	In My Not So Humble Opinion
1775	IMPAC	International Merchant Purchase Authorization Card
1776	IMPACT	International Medical Products Anti-Counterfeiting Taskforce
1777	IMPATT	IMPact Avalanche Transit Time diode
1778	IMPT	Institute of Maxillofacial Prosthetists and Technologists
1779	IMRL	Individual Material iness List
1780	IMRO-Internal Macedonian Revolutionary Organization	Irish Music Rights Organisation
1781	IMsL	International Ms. Leather
1782	IMT	Integrated Management Tool
1783	IMU	International Mathematical Union
1784	In	Indium
1785	INA	Immigration and Nationality Act
1786	INAS	International Near-Earth Asteroid Survey
1787	INCITS	InterNational Committee for Information Technology Standards
1788	IND	India (ISO 3166 trigram)
1789	INDIGO	(U.S.) INtelligence DIvision Gaming Operation
1790	inet	the Internet
1791	INFORMS	(U.S.) Institute for Operations Research and the Management Sciences
1792	INFOSEC	Information Security
1793	INLA	Irish National Liberation Army
1794	INMARSAT	International Maritime Satellite organization
1795	INRIA	Institut national de recherche en informatique et en automatique
1796	INS	Immigration and Naturalization Service
1797	InSAR	Interferometric synthetic aperture radar
1798	INST	Information Standards and Technology
1799	INTERFET	International Force for East Timor
1800	INTSUM	Intelligence Summary
1801	IO	British Indian Ocean Territory (ISO 3166 digram; FIPS 10-4 territory code)
1802	IOT	British Indian Ocean Territory (ISO 3166 trigram)
1803	IPB	Intelligence Preparation of the Battlefield
1804	IPL	Inferior Parietal Lobule
1805	IPO	Initial Public Offering
1806	IPT	Integrated Product/Project Team
1807	IPTS	Institute for Prospective Technological Studies
1808	IPTV	Internet Protocol TeleVision
1809	IPW	Interrogation of Prisoners of War
1810	Ir	Iridium
1811	IRAD	Internal Research and Development
1812	IRAN	(I) Inspect and Repair As Necessary
1813	IRAS	Infrared Astronomical Satellite
1814	IRB	International Rugby Board
1815	IRBM	Intermediate Range Ballistic Missile
1816	IREA	Intermountain Rural Electric Association
1817	IRINN	Islamic Republic of Iran News Network
1818	IRL	Ireland (ISO 3166 trigram),Industrial Research Limited,Indy Racing League,In real life
1819	IRN	Iran (ISO 3166 trigram)
1820	IRO	International Refugee Organisation
1821	IRQ	Iraq (ISO 3166 trigram)
1822	IRS	U.S. Internal Revenue Service
1823	IRST	Infra-red Search and Track
1824	ISAAA	International Service for the Acquisition of Agri-biotech Applications
1825	ISAR	Inverse SAR (Synthetic Aperture Radar)
1826	ISB	Intermediate Staging Base
1827	ISBN	International Standard Book Number (ISO 2108)
1828	ISCCP	International Satellite Cloud Climatology Project
1829	ISCII	Indian Standard Code for Information Interchange
1830	ISDN	Integrated Services Digital Network
1831	ISEF	Intel International Science and Engineering Fair
1832	ISEN	Internet Search Environment Number
1833	ISF	Internal Security Force
1834	ISIL	Islamic State of Iraq and the Levant
1835	ISIS	Institute for Science and International Security, or: Islamic State of Iraq and Syria
1836	ISL	Iceland (ISO 3166 trigram)
1837	ISLN	International Standard Lawyer Number (used initially by LexisNexis Martindale-Hubbell)
1838	ISMB	International Society of Matrix Biologists
1839	ISMC	Intelligent Sounding Meaningless Conversation
1840	ISOGP	Indian Society of Orthodontics for General Practitioners [2]
1841	ISPE	International Society for Pharmacoepidemiology
1842	ISRO	Indian Space Research Organisation
1843	ISSCR	International Society for Stem Cell Research
1844	ISSN	International standard serial number (ISO 3297)
1845	ISTC	Institute of Scientific and Technical Communications (UK)
1846	ISTS	Intel Science Talent Search
1847	ITA	Italy (ISO 3166 trigram)
1848	ITAG	Inertial Terrain-Aided Guidance
1849	ITALY	I'll Truly Always Love You
1850	ITAS	Improved Target Acquisition Sight
1851	ITC	InferoTemporal Cortex (neurophysiology)
1852	ITCZ	Intertropical Convergence Zone
1853	ITEC	Information Technology Exposition & Conference
1854	ITEMS	Interactive Tactical Environment Management System
1855	ITER	International Thermonuclear Experimental Reactor
1856	ITF	International Tennis Federation
1857	ITK	In The Know
1858	ITN	Independent Television News (British)
1859	ITT	International Telephone and Telegraph (U.S.)
1860	ITTO	International Tropical Timber Organization
1861	IUCN	International Union for the Conservation of Nature and Natural Resources (World Conservation Union)
1862	Iveco	Industrial Vehicles Corporation
1863	IVF	In Vitro Fertilisation
1864	IVI	Interchangeable Virtual Instrument
1865	IVIS	Inter-Vehicle Information System
1866	IVL	Inter-Visibility Line
1867	IVM	In Vitro [Oocyte] Maturation
1868	IVO	In Vicinity Of
1869	IW	Information Warfare
1870	IWARS	Infantry Warrior Simulation
1871	IWC	International Whaling Commission
1872	IWW	Industrial Workers of the World
1873	IX	Nine (in Roman numerals)
1874	IXT	IntraText digital library; IntraText lexical hypertext
1875	IY	Saudi-Iraqi neutral zone (FIPS 10-4 territory code; obsolete 1993)
1876	IZ	Iraq (FIPS 10-4 country code)
1877	J	Joule
1878	J1	Joint [Manpower &] Personnel Directorate
1879	J2	Joint Intelligence Directorate
1880	J3	Joint Operations Directorate
1881	J4	Joint Logistics Directorate
1882	J5	Joint Strategic Plans & Policy Directorate
1883	J7	Joint Operational Plans & Interoperability Directorate
1884	JA	Japan (FIPS 10-4 country code)
1885	JAFT	Just A Field Test
1886	JAL	Japan Airlines
1887	JALLC	Joint Analysis and Lessons Learned Centre (NATO)
1888	JAM	Jamaica (ISO 3166 trigram)
1889	JAMA	Journal of the American Medical Association
1890	JANET	Joint Academic Network
1891	JATO	Jet-Assisted Take-Off
1892	JB	Jail Bait
1893	JB	Junior Branch
1894	JBFSA	Joint Blue Force Situational Awareness
1895	JCDB	Joint Common Data Base
1896	JCDS	Joint Chiefs of the Defence Staff
1897	JCIDS	Joint Capabilities Integration and Development System
1898	JCL	Job Control Language
1899	JCP	Java Community Process
1900	JCS	Joint Chiefs of Staff
1901	JCW	Juggalo Championship Wrestling
1902	JDBC	Java Data Base Connectivity
1903	JDEM	Joint Dark Energy Mission
1904	JDL	Jewish Defense League
1905	JE	Jersey (FIPS 10-4 territory code)
1906	JEFX	Joint Expeditionary Force eXperiment
1907	JET	Joint European Torus
1908	JEZ	Joint Engagement Zone
1909	JFACC	Joint Force Air Component Commander
1910	JFACTSU	U.S. Joint Forward Air Control Training and Standards Unit
1911	JFC	Joint Force Commander
1912	JFK	John Fitzgerald Kennedy or the airport named after him.
1913	JFLCC	Joint Force Land Component Commander
1914	JFMCC	Joint Force Maritime Component Commander
1915	JFO	Journal of Field Ornithology
1916	JFSOCC	Joint Force Special Operations Component Commander
1917	JFTX	Joint Field Training Exercise
1918	JH	Japan Highway Public Corporation
1919	JH	Jharkhand (Indian state code)
1920	JI	Joint Implementation
1921	JIB	Joint Information Bureau
1922	JIC	Joint Intelligence Centre
1923	JINI	Java Intelligent Network Infrastructure
1924	JITC	Joint Interoperability Test Command
1925	JIVE	Joint Institute for VLBI (Very Long Baseline Interferometry) in Europe
1926	JJAP	Japanese Journal of Applied Physics
1927	JL	Japan Airlines (IATA airline designator)
1928	JLA	Justice League of America
1929	JM	Jamaica (FIPS 10-4 country code; ISO 3166 digram)
1930	JMS	Java Message Service
1931	JN	Jan Mayen Island (FIPS 10-4 territory code)
1932	JNI	Java Native Interface
1933	JNLP	Java Network Launch Protocol
1934	JO	Jordan (FIPS 10-4 country code; ISO 3166 digram)
1935	JOA	Joint Operations Area
1936	JOPES	Joint Operations Planning and Execution System
1937	JOR	Jordan (ISO 3166 trigram)
1938	JOTS	Joint Operations Tactical System
1939	JPL	Jet Propulsion Laboratory
1940	JPN	Japan (ISO 3166 trigram)
1941	JPOW	Joint Project Optic Windmill
1942	JRDF	Joint Rapid Deployment Forces
1943	JRE	Java Runtime Environment
1944	JREF	James Randi Educational Foundation
1945	JROC	Joint Requirements Oversight Council
1946	JROCM	JROC Memorandum
1947	JRRF	Joint Rapid Reaction Force
1948	JRSAI	Journal of the Royal Society of Antiquaries of Ireland
1949	JSAP	Japan Society of Applied Physics
1950	JSCSC	Joint Services Command and Staff College
1951	JSEAD	Joint Suppression of Enemy Air Defence (see SEAD)
1952	JSF	Joint Strike Fighter
1953	JSIMS	Joint Simulation System
1954	JSOA	Joint Special Operations Area
1955	JSOTF	Joint Special Operations Task Force
1956	JSP	JavaServer Page
1957	JSP	Joint Services Publication
1958	JSR	Java Specification Request
1959	JSS	Joint Support Ship Project
1960	JTC	Joint Training Confederation
1961	JTF	Joint Task Force
1962	JTFEX	Joint Task Force Exercise
1963	JTLS	Joint Theater Level Simulation
1964	JTMD	Joint Theatre Missile Defence
1965	JTN	Johnston Atoll (ISO 3166 trigram; obsolete 1986)
1966	JU	Juan de Nova Island (FIPS 10-4 territory code)
1967	JUGFET	JUnction Gate Field-Effect Transistor
1968	JUICE	JUpiter ICy Moon Explorer
1969	JUO	Joint Urban Operations
1970	JV	Joint Venture,Junior Varsity
1971	JW	Jehovah's Witnesses
1972	JWARS	Joint Warfare System (simulation)
1973	JWP	Joint Warfare Publication
1974	JY	Japanese Yen
1975	JZ	Joint Zone
1976	K	Kelvin,Potassium (Latin Kalium),Tanker (aircraft designation code)
1977	k	Kilo-
1978	K	picokelvin
1979	K9	Canine Police Unit
1980	Ka	Kamov Design Bureau
1981	kA	Kiloampere
1982	KA	Knowledge Acquisition,Karnataka (Indian state code)
1983	KAF	Kandahar Air Field
1984	KANUKOKA	Kalaallit Nunaanni Kommunit Kattuffiannit (Kalaallisut, Greenlandic Communities Association
1985	KARNAC	Knowledge Aided Retrieval in Activity Context
1986	KARR	Knight Automated Roving Robot (Knight Rider character)
1987	KATUSA	Korean Augmentation To United States Army
1988	KAZ	Kazakhstan (ISO 3166 trigram)
1989	KBE	Knight Commander of the Order of the British Empire
1990	KBO	Kuiper Belt Object
1991	KBVB	Koninklijke Belgische Voetbalbond (Dutch for Royal Belgian Football Association)
1992	kC	Kilocoulomb
1993	KCK	Kansas City,Kansas,Koma Civakên Kurdistan (Kurdish, Union of Communities in Kurdistan)
1994	KCL	King's College London
1995	KCMO	Kansas City,Missouri (pronounced: K-C-Moe)
1996	KCS	Kansas City Southern Railway (AAR reporting mark)
1997	KD	Kawasaki Disease,Kraft Dinner
1998	KE	Kenya (FIPS 10-4 country code; ISO 3166 digram),Kinetic Energy,Knowledge Engineering
1999	KEDO	Korean Peninsula Energy Development Organization
2000	KEN	Kenya (ISO 3166 trigram)
2001	KERA	Kentucky Education Reform Act (of 1990)
2002	kerma	Kinetic Energy Released in MAterial / in MAtter / per unit MAss
2003	KESR	Kent and East Sussex Railway.
2004	KET	Kentucky Educational Television,Key English Test
2005	kF	Kilofarad
2006	KFC	Kentucky Fried Chicken
2007	KFOR	UN Kosovo Force
2008	KFUPM	King Fahd University of Petroleum & Minerals
2009	KG	Kyrgyzstan (FIPS 10-4 country code; ISO 3166 digram)
2010	KGO	Knight of the Guelphic Order of Hanover
2011	KGZ	Kyrgyzstan (ISO 3166 trigram)
2012	KH	Cambodia (ISO 3166 digram)
2013	kH	Kilohenry
2014	KHL	Kontinental Hockey League
2015	KHM	Cambodia (ISO 3166 trigram)
2016	KHz	Kilohertz
2017	Ki	Kibi
2018	KI	Kiribati (ISO 3166 digram)
2019	KIA	Killed In Action
2020	KIDS	Knowledge-based Integrated Design System
2021	KIR	Kiribati (ISO 3166 trigram)
2022	KISS	Keep It Simple,Stupid / Keep It Short and Simple,Korean Intelligence Support System
2023	KIT	Keep In Touch
2024	KITECH	Korean Institute of Industrial Technology
2025	KITT	Knight Industries Two Thousand, Knight Industries Three Thousand
2026	kJ	Kilojoule
2027	kK	Kilokelvin
2028	KKK	Ku Klux Klan
2029	kL	Kilolitre
2030	KLENOT	KLEť Observatory Near Earth and Other unusual objects observations Team and Telescope
2031	KLOC	Kilo Lines Of Code
2032	KM	Comoros,Knowledge Management
2033	kN	Kilonewton
2034	KNA	Saint Kitts and Nevis (ISO 3166 trigram)
2035	KNVB	Koninklijke Nederlandse Voetbal Bond (Dutch for Royal Dutch Football Association)
2036	KO	Knocked Out
2037	KOR	Republic of Korea (ISO 3166 trigram)
2038	KP	Kim Possible
2039	KPMG	Klynveld,Peat,Marwick,Goerdeler
2040	KPNO	Kitt Peak National Observatory
2041	KQ	Kenya Airways (IATA airline designator), Kingman Reef (FIPS 10-4 territory code)
2042	KR	Kiribati (FIPS 10-4 country code), Republic of Korea (ISO 3166 digram)
2043	Kr	Krypton
2044	KS	Kansas (postal symbol), Republic of Korea (FIPS 10-4 country code)
2045	kS	Kilosiemens
2046	KSC	Kennedy Space Center
2047	KSI	Killed or Seriously Injured
2048	KSU	Kansas State University
2049	KT	Christmas Island (FIPS 10-4 territory code), Knight of the Order of the Thistle, Knights Templar
2050	kT	Kilotesla
2051	KTS	Knight of the Tower and Sword (of Portugal)
2052	KU	Kuwait (FIPS 10-4 country code)
2053	KUW	Kuwait (UNDP country code,IOC and FIFA trigram,but not ISO 3166)
2054	kV	Kilovolt
2055	KV	Kosovo
2056	kW	Kilowatt
2057	KW	Kuwait (ISO 3166 digram)
2058	KWB	Kids' WB!
2059	KWT	Kuwait (ISO 3166 trigram)
2060	KX	Cayman Airways (IATA airline designator)
2061	KY	Cayman Islands (ISO 3166 digram), Kentucky (postal symbol)
2062	KZ	Kazakhstan (FIPS 10-4 country code; ISO 3166 digram)
2063	KZN	KwaZulu-Natal
2064	La	Lanthanum
2065	LA	Laos (FIPS 10-4 country code; ISO 3166 digram), Louisiana (postal symbol), Los Angeles
2066	LAAS	Local Area Augmentation System, Los Angeles Astronomical Society
2067	LAB	Logistics Assault Base
2068	LabVIEW	Laboratory Virtual Instrumentation Engineering Workbench
2069	LACMA	Los Angeles County Museum of Art
2070	LAD	Laser Aiming Device
2071	LADW	Local Air Defence Warning
2072	LAESI	Local Authority & Emergency Service Information
2073	LAN	Local Area Network
2074	LANL	Los Alamos National Laboratory
2075	LAO	Laos (ISO 3166 trigram)
2076	LAR	Light Armoured Reconnaissance, Logistics Assistance Representative
2077	LARC	Livermore Advanced Research Computer (cf. LLNL)
2078	LARP	Live-Action Role-Playing
2079	Laser	Light Amplification by Stimulated Emission of Radiation (cf. Maser)
2080	LAT	Lowest Astronomical Tide (nautical charts),Licensed Athletic Trainer (used in many of the United States; see www.oata.org)
2081	LATA	Local Access Transport Area
2082	LATCH	Lower Anchors and Tethers for Children (U.S. standard for attachment points for child safety seats in passenger cars)
2083	LAV	Land Assault Vehicle, Light Armoured Vehicle, Lymphadenopathy-Associated Virus
2084	LAW	Light Antitank Weapon
2085	LAX	Los Angeles International Airport, The Latin American Xchange (professional wrestling)
2086	LB	Lebanon (ISO 3166 digram)
2087	LBH	Light Battlefield Helicopter, Lyman-Birge-Hopfield bands
2088	LBJ	Lady Bird Johnson,LeBron James,Light Bulb Joke,Little Beagle Johnson (the dog owned by Lyndon and Lady Bird Johnson),Lyndon Baines Johnson
2089	LBN	Lebanon (ISO 3166 trigram)
2090	LBNL	Lawrence Berkeley National Laboratory
2091	LBR	Liberia (ISO 3166 trigram)
2092	LBS	Location-Based Services
2093	LBT	Large Binocular Telescope
2094	LBW	Leg Before Wicket
2095	LBY	Libya (ISO 3166 trigram)
2096	LCA	Saint Lucia (ISO 3166 trigram)
2097	LCC	Land Component Commander
2098	LCCP	Light Contingency Communications Package
2099	LCD	Liquid Crystal Display
2100	LCM	Least/Lowest Common Multiple
2101	LCS	League of Legends Championship Series
2102	LDA	Lateral Drift Apparatus (paratroops)
2103	LDC	Lesser Developing/Developed Country
2104	LDL	Low-Density Lipoprotein
2105	LDV	Local Defence Volunteers (British Home Guard)
2106	LDW	Lane Departure Warning (ADAS)
2107	LE	Lebanon (FIPS 10-4 country code)
2108	LEC	Local Exchange Carrier
2109	LED	Light-Emitting Diode
2110	LEGAD	Legal Advice
2111	Legs	level emotion gad speed
2112	LEMOSS	Long-Endurance MObile Submarine Simulator
2113	LEN	Large Extension Node
2114	LEP	Large Electron-Positron collider
2115	LER	Loss-Exchange Ratio
2116	LEU	Low-Enriched Uranium
2117	LF	Low Frequency
2118	LFO	Low Frequency Oscillation / Oscillator
2119	LFTR	Liquid fluoride thorium reactor
2120	LG	Latvia (FIPS 10-4 country code)
2121	LGM	Little Green Men
2122	LGS	Landsat Ground Station
2123	LHC	Large Hadron Collider
2124	LHS	Left Hand Side
2125	Li	Lithium
2126	LIBOR	London Interbank Offered Rate
2127	LIBS	Laser Induced Breakdown Spectroscopy
2128	LIE	Liechtenstein (ISO 3166 trigram)
2129	LIGO	Laser Interferometer Gravitational-Wave Observatory
2130	LINEAR	Lincoln Near-Earth Asteroid Research
2131	LISA	Laser Interferometer Space Antenna
2132	LIVE	Liquid Inertial Vibration Eliminator
2133	LJJ	Lord Justices of Appeal
2134	LK	Sri Lanka (ISO 3166 digram)
2135	LKA	Sri Lanka (ISO 3166 trigram)
2136	LKR4	Linkwitz-Riley 4th order (audio crossover type)
2137	LLAD	Low Level Air Defence
2138	LLB	Legum Baccalaureus (Latin: Bachelor of Laws)
2139	LLC	Limited Liability Company
2140	LLLTV	Low-Light Level Television
2141	LLNL	Lawrence Livermore National Laboratory
2142	LLP	Limited Liability Partnership
2143	LLTR	Low-Level Transit Route
2144	LMAO	Laughing My Ass Off (Internet shorthand)
2145	LMB	Lick My Balls
2146	LMFAO	Laughing My F**king Ass Off (Internet shorthand,electro-hop duo)
2147	LMN	Lifetime Movie Network
2148	LMS	Like My Status (Internet shorthand)
2149	LMV	() Light Motor Vehicle
2150	LNER	London and North Eastern Railway
2151	LNG	Liquefied Natural Gas
2152	LNO	Liaison Officer
2153	LO	Slovakia (FIPS 10-4 country code)
2154	LOA	Limit Of Advance
2155	LOC	Level of Operational Capability,Limited Operational Capability,Lines Of Code,Lines Of Communication,see entry
2156	LoD	Lines of Development (UK)
2157	LOFAR	Low Frequency Analysis and Recording
2158	LOGPAC	Logistics Package
2159	LOL	Laughing Out Loud (Internet shorthand)
2160	LOMEZ	Low Altitude Missile Engagement Zone
2161	LONEOS	Lowell Observatory Near-Earth-Object Search
2162	LORTID	LOng Range Target IDentification
2163	LOS	Line Of Sight
2164	LOSAT	Line-Of-Sight Anti-Tank (missile)
2165	LOTA	Licentiate of the Orthodontic Technicians Association
2166	LOTIS	Livermore Optical Transient Imaging System
2167	LOTS	Logistics Over-The-Shore
2168	LPC	Linear Predictive Coding
2169	LPG	Liquefied Petroleum Gas (cf. LNG)
2170	LPI	Low Probability of Intercept
2171	LQ	Palmyra Atoll (FIPS 10-4 territory code)
2172	Lr	Lawrencium
2173	LR	Liberia (ISO 3166 digram)
2174	LRC	Logistics iness Center
2175	LRGW	Long-Range Guided Weapon
2176	LRICBM	Limited Range ICBM
2177	LRIP	Low Rate Initial Production
2178	LRP	Logistics Release Point
2179	LRPE	Long-Range Planning Element
2180	LRS	Long Range Surveillance
2181	LRU	Line-Replaceable Unit
2182	LSI	Large-Scale Integration
2183	LSIF	Labour Sponsored Investment Fund
2184	LSND	Liquid Scintillator Neutrino Detector
2185	LSO	Lesotho (ISO 3166 trigram)
2186	LSST	Large Synoptic Survey Telescope
2187	Lt	Lieutenant
2188	LtC	Lieutenant-Colonel (U.S.)
2189	LTC	Long-Term Costing
2190	Ltd	Limited
2191	LTDP	Long-Term Defence Plan
2192	LTI	Linear Time-Invariant
2193	LTM	Acronym for Laughing To Myself
2194	LTP	Long-Term Potentiation
2195	LTU	Lithuania (ISO 3166 trigram)
2196	LU	Acronym Love You
2197	LU	Loonatics Unleashed
2198	Lu	Lutetium
2199	LUCA	Last Universal Common Ancestor
2200	LUG	Linux User Group
2201	LULU	Locally Unwanted Land Use (urbanism)
2202	LUX	Luxembourg (ISO 3166 trigram)
2203	LVA	Latvia (ISO 3166 trigram)
2204	LVEF	Left Ventricular Ejection Fraction
2205	Lw	Lawrencium (obsolete 1963)
2206	LWR	Laser warning receiver
2207	LWRC	Land Warfare Resources Corporation
2208	LWS	Land Warrior System
2209	LX	Electrics (theatrical term)
2210	LYAO	Laugh Your Ass Off
2211	LYLAS	Love You Like A Sister
2212	Ma	Megaannum
2213	mA	Milliampere
2214	MAA	Mathematical Association of America
2215	MAAC	Metro Atlantic Athletic Conference
2216	MACE	Multi-Agent Computing Environment
2217	MACHO	MAssive Compact Halo Object
2218	MAF	Maintenance Action Form
2219	MAGIC	Major Atmospheric Gamma-ray Imaging Cherenkov (telescope)
2220	MAGNETAR	Metaprogrammable AGent NETwork ARchitecture
2221	MAGTF	Marine Air-Ground Task Force
2222	MALD	Miniature Air-Launched Decoy
2223	MANPADS	MAN-Portable Air Defence System
2224	MANPRINT	MANpower and PeRsonnel INTegration
2225	MAO	Molėtų astronomijos observatorija (Moletai Astronomical Observatory),MonoAmine Oxidase
2226	MAOI	Monoamine oxidase inhibitor
2227	MAPS	Monitoring Avian Productivity and Survivorship
2228	MAR	Morocco (ISO 3166 trigram)
2229	MarBEF	Marine Biodiversity and Ecosystem Functioning
2230	MARCENT	United States Marine Forces Central Command
2231	MARFORCC	Marine Force Component Commander
2232	MASAS	Monte Agliale Supernovae and Asteroid Survey
2233	Maser	Microwave Amplification by Stimulated Emission of Radiation
2234	MASH	Mobile Army Surgical Hospital
2235	MASINT	Measurement And Signature Intelligence
2236	MAVS	Mobile Artillery Vehicle System
2237	MBBL	(U.S. Armor Center) Mounted Battlespace Battle Laboratory
2238	MBCC	Migratory Bird Conservation Commission (U.S.)
2239	MBCS	Multi-Byte Character Set
2240	MBI	Moody Bible Institute
2241	MBIDST	Member of the British Institute of Dental and Surgical Technologists
2242	MBM	Meat and Bone Meal
2243	MBT	Main Battle Tank
2244	MBTI	Myers-Briggs Type Indicator
2245	mC	Millicoulomb
2246	MCDL	Model Composition Definition Language
2247	MCFT	Modified Compression Field Theory
2248	MCG	Melbourne Cricket Ground
2249	MCIS	Mellon Collie and the Infinite Sadness
2250	MCM	Mine Counter-Measures
2251	MCMV	Mine Counter-Measure Vessel
2252	MCR	My Chemical Romance
2253	MCSF	Marine Corps Security Forces
2254	MCT	Movement Control Team
2255	MCTIS	Mounted Co-operative Target Identification System
2256	Md	Mendelevium
2257	MDNA	Madonna's 12th studio album title (2012)
2258	MDO	Membership Driven Organisation
2259	MDP	Markov Decision Process
2260	MDT	Mountain Daylight Time (UTC-6 hours)
2261	MDV	Maldives (ISO 3166 trigram)
2262	Me	Messerschmitt
2263	MEAC	Mid-Eastern Athletic Conference (ME-ac)
2264	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)
2265	MEDEVAC	Medical evacuation
2266	MEDS	Mission Essential Data Set
2267	MEG	MagnetoEncephaloGraphy
2268	MELT	Metallic Line/Loop Test (ing)
2269	MEMS	Microelectromechanical System
2270	MER	Mars Exploration Rover
2271	MERL	Mitsubishi Electric Research Laboratories
2272	MES	Manufacturing Execution Systems
2273	METAR	[Meteorological] Aviation Routine weather report
2274	METOC	Meteorological and Oceanographic
2275	MeV	Megaelectronvolt
2276	MEX	Mexico (ISO 3166 trigram)
2277	MEZ	Missile Engagement Zone
2278	mF	Millifarad
2279	MGPAM	My Gym Partner's a Monkey
2280	MGS	Mobile Gun System
2281	mH	Millihenry
2282	MHC	Major Histocompatibility Complex
2283	MHHW	Mean Higher High Water (nautical charts)
2284	MHL	Marshall Islands (ISO 3166 trigram)
2285	MHLW	Mean Higher Low Water (nautical charts)
2286	MHRA	(UK) Medicines and Healthcare products Regulatory Agency
2287	MHW	Mean High Water (nautical charts)
2288	MHWN	Mean High Water Neaps (nautical charts)
2289	MHWS	Mean High Water Springs (nautical charts)
2290	MHz	Megahertz
2291	Mi	Mebi
2292	MIA	Missing In Action
2293	MICLIC	Mine Clearing Line Charge
2294	MICOM	Missile Command
2295	MID	Midway Islands (ISO 3166 trigram; obsolete 1986)
2296	MIDAS	Man-machine Integration Design and Analysis System
2297	MIDI	Musical Instrument Digital Interface
2298	MIDS	Multi-Function Information Distribution System
2299	MIFG	Shallow Fog (METAR Code)
2300	MIKE	Monitoring of Illegal Killing of Elephants
2301	MIL	Man-In-the-Loop
2302	MILC	Mirrorless interchangeable-lens camera
2303	MILF	Mother I'd Like to Fuck
2304	MIMOSA	MIcroMeasurements Of Satellite Acceleration
2305	MIMPT	Member of the Institute of Maxillofacial Prosthetists and Technologists
2306	MIRA	MILAN Infra-Red Acquisition (thermal sight)
2307	MIRV	Multiple Independent Reentry Vehicle
2308	MISREP	Mission Report
2309	MISSI	Multilevel Information System Security Initiative
2310	MITL	Man-In-The-Loop
2311	MITS	see entry
2312	mJ	Millijoule
2313	MJD	Modified Julian Day
2314	mK	Millikelvin
2315	MKG	Michael Kidd-Gilchrist (American basketball player)
2316	MKSA	Metre-Kilogram-Second-Ampere (system of units)
2317	mL	Millilitre
2318	MLB	Major League Baseball
2319	MLC	Member of the Legislative Council (in India)
2320	MLE	Maximum likelihood estimation
2321	MLHW	Mean Lower High Water (nautical charts)
2322	MLI	Mali (ISO 3166 trigram)
2323	MLL	Major League Lacrosse
2324	MLLW	Mean Lower Low Water (nautical charts)
2325	MLP	My Little Pony
2326	MLRS	Multiple-Launch Rocket System
2327	MLT	Malta (ISO 3166 trigram)
2328	MLW	Mean Low Water (nautical charts)
2329	MLWN	Mean Low Water Neaps (nautical charts)
2330	MLWS	Mean Low Water Springs (nautical charts)
2331	Mm	Megametre
2332	mm	Millimetre
2333	MMEV	Multi-Mission Effects Vehicle
2334	MMI	Magical MonkeyZ Inc.
2335	MMI	Man-Machine Interface
2336	MMI	McLean Meditation Institute
2337	MMIC	McLean Meditation Institute Certified
2338	MMO	Massively Multiplayer Online (computer game)
2339	MMOR	Master of Management in Operations Research
2340	MMORPG	Massively multiplayer online role-playing game
2341	MMPR	Mighty Morphin Power Rangers
2342	MMS	Multimission Modular Spacecraft
2343	Mn	Manganese
2344	mN	Millinewton
2345	MNB	Multinational Brigade
2346	MNE	Montenegro (ISO 3166 trigram)
2347	MNMF	Multi-National Maritime Force
2348	MNP	Northern Mariana Islands (ISO 3166 trigram)
2349	MNS	Mission Needs Statement
2350	Mo	Molybdenum
2351	MOA	Museum of Art (Brigham Young University)
2352	MOCAS	Mechanization Of Contract Administration Services
2353	MoD	Ministry of Defence (United Kingdom) and various other countries
2354	modem	Modulator-Demodulator
2355	Moe	Marvel of entertainment
2356	MOE	Measure Of Effectiveness
2357	MOF	Ministry of Finance (Japan)
2358	MOFA	Ministry of Foreign Affairs (Japan)
2359	MOID	Minimum Orbital Intersection Distance
2360	MOJWA	Movement for Oneness and Jihad in West Africa
2361	MOLO	Mobile Other Licensed Operator (UK)
2362	MOM	Master's Degree in Oriental medicine
2363	MOM	Message Oriented Middleware
2364	MoM	Multiple of the median
2365	MoMA	Museum of Modern Art (NYC)
2366	MOND	Modified Newtonian Dynamics
2367	MOO	Measure Of Outcome
2368	MOPP	Mission-Oriented Protective Posture
2369	MORP	Meteorite Observation and Recovery Project
2370	MOSFET	Metal-Oxide-Semiconductor Field-Effect Transistor
2371	MOT	Ministry of Transport (UK)
2372	MOTA	Member of the Orthodontic Technicians Association
2373	MOTESS	Moving Object and Transient Event Search System
2374	MOU	Memorandum Of Understanding
2375	MOW	Maintenance of way (also MW)
2376	MOZ	Mozambique (ISO 3166 trigram)
2377	MPa	Megapascal
2378	mPa	Millipascal
2379	MPAA	Motion Picture Association of America
2380	MPEC	Minor Planet Electronic Circular
2381	MPEG	Motion Pictures (Coding) Experts Group
2382	MPEV	Multi-Purpose Engineering Vehicle
2383	MPF	Maritime Prepositioning Force
2384	MPFC	Medial PreFrontal Cortex
2385	MPG	Miles Per Gallon
2386	MPMC	Medial PreMotor Cortex
2387	MPSI	Member of the Pharmaceutical Society of Ireland
2388	MPSoC	MultiProcessor System-on-Chip
2389	MPSRON	Maritime Propositioning Ship Squadron
2390	MR	Mauritania (FIPS 10-4 country code; ISO 3166 digram)
2391	MRAV	Multi-Role Armoured Vehicle
2392	MRBM	Medium Range Ballistic Missile
2393	MRC	Maintenance Requirements Card
2394	MRD	Motorized Rifle Division
2395	MRGW	Medium-Range Guided Weapon
2396	MRI	Magnetic Resonance Imaging
2397	MRL	Multiple Rocket Launcher
2398	MRPharmS	Member of the Royal Pharmaceutical Society (Great Britain)
2399	MRS	Magnetic Resonance Spectroscopy
2400	MRSA	Methicillin-resistant Staphylococcus aureus
2401	MRTFB	U.S. Major Range and Test Facility Base
2402	Ms	Megasecond
2403	mS	Millisiemens
2404	MSD	Minimum Safe Distance
2405	MSDB	Multi Source Data Base
2406	MSE	Multiple Subscriber Element
2407	MSG	Message
2408	MSLP	Mean Sea Level Pressure
2409	MSNBC	Microsoft National Broadcasting Company Cable news channel (see also msnbc.com)
2410	MSO	Multiple System Operator
2411	MSPB	Merit Systems Protection Board
2412	MSSA	Methicillin-susceptible Staphylococcus aureus
2413	Mt	Meitnerium
2414	mT	Millitesla
2415	MTBF	Mean time between failures
2416	MtF	Male-to-female transsexual
2417	MTG	Magic: The Gathering
2418	MTQ	Martinique (ISO 3166 trigram)
2419	MTT	Methylthiazol tetrazolium (assay)
2420	MTWS	MAGTF Tactical Warfare System
2421	MUS	Mauritius (ISO 3166 trigram)
2422	mV	Millivolt
2423	MVC	Missouri Valley Conference
2424	MVFC	Missouri Valley Football Conference
2425	MVNO	Mobile virtual network operator
2426	mW	Milliwatt
2427	MWESH	Machismo Wizards Extended SHelter (operating system)
2428	MWI	Malawi (ISO 3166 trigram)
2429	MWOA	Mount Wilson Observatory Association
2430	MWTB	Mounted Warfare Test Bed
2431	MY	Malaysia (FIPS 10-4 country code; ISO 3166 digram)
2432	MYOB	Mind Your Own Business
2433	MYS	Malaysia (ISO 3166 trigram)
2434	MYT	Mayotte (ISO 3166 trigram)
2435	n	Nano
2436	N3F	National Fantasy Fan Federation
2437	nA	Nanoampere
2438	Na	Sodium (Latin Natrium)
2439	NAA	N-Acetylaspartate
2440	NAAD	North American Air Defense
2441	NAAQS	National Ambient Air Quality Standards
2442	NAAWS	NATO Anti-Air Warfare System
2443	NAC	National Agency Check,U.S. Naval Avionics Center,U.S. Navy Advanced Concepts,North Atlantic Council,Northern Area Command
2444	NACC	North Atlantic Cooperation Council
2445	NACISA	NATO Communications and Information Systems Agency
2446	NACMA	NATO Air Command and Control System Management Agency
2447	NACRA	North America Caribbean Rugby Association (more specifically rugby union)
2448	NAEC	U.S. Naval Air Engineering Center
2449	NAFERA	Native American Free Exercise of Religion Act
2450	NAFLD	NonAlcoholic Fatty Liver Disease
2451	NAFO	Northwest Atlantic Fisheries Organization
2452	NAFTA	North American Free Trade Agreement
2453	NAGPRA	Native American Graves Protection and Repatriation Act
2454	NAICS	North American Industry Classification System
2455	NAIL	Neurotics Anonymous
2456	NAILS	National Airspace Integrated Logistics System
2457	NAIRU	Non Accelerating Inflation Rate of Unemployment
2458	NAK	Negative Acknowledge
2459	NAM	Namibia (ISO 3166 trigram)
2460	NAMBLA	North American Man-Boy Love Association
2461	NAMRL	Naval Aerospace Medical Research Laboratory
2462	NaN	Not A Number (computing)
2463	NAO	UK National Audit Office
2464	NAPS	Navy Acquisition Procedures Supplement
2465	NARA	(U.S.) National Archives and Records Administration
2466	NARAL	National Abortion Rights Action League
2467	NARDAC	Naval Regional Data Automation Center
2468	NARDIC	U.S. Navy Acquisition Research and Development Information Center
2469	NARPV	National Association for Remotely Piloted Vehicles
2470	NASCAR	National Association for Stock Car Auto Racing
2471	NASDAQ	National Association of Securities Dealers Automated Quotations
2472	NASED	National Association of State Election Directors [1][2]
2473	NASH	Non-Alcoholic Steatohepatitis
2474	NASP	National Aerospace Plane
2475	NASS	National Association of Secretaries of State [3]
2476	NatGeo	National Geographic
2477	NaUKMA	National University of Kyiv-Mohyla Academy
2478	NAV	Navigation[al]
2479	NAVCAMS	Naval Communications Area Master Station
2480	NAVCC	National Audio-Visual Conservation Center
2481	NAVCENT	Naval Forces U.S. Central Command
2482	NAVDAC	Naval Data Automation Command
2483	NAVEUR	Naval Forces U.S. European Command
2484	NAVFOR	Naval Force
2485	NAVMACS	Naval Modular Automatic Communication Subsystem
2486	NAVNET	Navy Network
2487	NAVS	Non-Cooperative Airborne Vector Scoring
2488	NAVSAT	Navigation Satellite
2489	NAVSPACECOM	U.S. Navy Space Command
2490	NAVSPASUR	U.S. Naval Space Surveillance System
2491	NAVSTAR	Navigation Satellite Timing And Ranging
2492	NAVTACNET	Navy Tactical Network
2493	NAWC	U.S. Naval Air Warfare Center
2494	Nb	Niobium
2495	NBA	National Basketball Association
2496	NBL	National Basketball League (Australia)
2497	NBT	Nitroblue tetrazolium (assay)
2498	nC	Nanocoulomb
2499	NCA	National Command Authority
2500	NCAR	U.S. National Center for Atmospheric Research
2501	NCB	National Codification Bureau
2502	NCCAM	U.S. National Center for Complementary and Alternative Medicine
2503	NCCUSL	National Conference of Commissioners on Uniform State Laws (U.S.)
2504	NCDDR	U.S. National Center for the Dissemination of Disability Research
2505	NCI	U.S. National Cancer Institute
2506	NCL	New Caledonia (ISO 3166 trigram)
2507	NCLR	National Council of La Raza
2508	NCMO	No Commitment Make Out
2509	NCO	Non-Commissioned Officer
2510	NCP	Net Contracted Purchases
2511	NCR	National Cash Register Co.
2512	NCTR	Non-Co-operative Target Recognition
2513	NCW	Network Centric Warfare
2514	Nd	Neodymium
2515	NDAA	U.S. National Defense Authorization Act
2516	NDBP	Non-Departmental Public Body (Scotland)
2517	NDP	New Democratic Party (Canada)
2518	NDS	Nintendo DS
2519	Ne	Neon
2520	NECTEC	National Electronics and Computer Technology Center (Thailand)
2521	NEMS	National Energy Modeling System (USDOE-EIA)
2522	NEPA	National Environmental Policy Act
2523	NER	Niger (ISO 3166 trigram)
2524	NERICA	New Rice for Africa
2525	NESP	NSA/CSS Enterprise Standards Program
2526	NET	National Educational Television
2527	NETCU	(UK) National Extremism Tactical Co-ordination Unit
2528	NETL	(US) National Energy Technology Laboratory
2529	NETWARS	Network Warfare Simulation
2530	NEX	Navy EXchange
2531	nF	Nanofarad
2532	NF	Norfolk Island (ISO 3166 digram)
2533	NFER	National Foundation for Educational Research
2534	NFG	No Fucking Good
2535	NFHS	National Federation of State High School Associations
2536	NFI	Not F****** Interested
2537	NFK	Norfolk Island (ISO 3166 trigram)
2538	Nfld	Newfoundland
2539	NFPA	National Fluid Power Association (United States)
2540	NFT	No Further Text
2541	NGATS	New Generation Army Targetry System
2542	NGH	Northern General Hospital
2543	NGO	non-governmental organization
2544	NGS	Naval Gunfire Support
2545	nH	Nanohenry
2546	NHANES	National Health and Nutrition Examination Survey
2547	NHB	New Hebrides (ISO 3166 trigram; obsolete 1980)
2548	NHB	No Holds Barred radio (Link)
2549	NHL	National Hockey League
2550	NHRA	National Hot Rod Association
2551	NHS	National Health Service (UK)
2552	Ni	Nickel
2553	NIAAA	U.S. National Institute on Alcohol Abuse and Alcoholism
2554	NIAG	NATO Industrial Advisory Group
2555	NIAID	National Institute of Allergies and Infectious Disease
2556	NIAMD	National Institute of Arthritis and Musculoskeletal Diseases
2557	NIB	New In Box (Internet auction/trading listings)
2558	NIBP	Non-invasive blood pressure monitor
2559	NicA	Nicotine Anonymous
2560	NICAP	National Investigations Committee on Aerial Phenomena
2561	NICE	UK. National Institute for Health and Clinical Excellence
2562	NICHD	National Institute of Child Health and Human Development [4]
2563	NICP	National Inventory Control Point
2564	NIDDK	National Institute of Diabetes and Digestive and Kidney Diseases
2565	NIDRR	National Institute on Disability Research and Rehabilitation
2566	NIEHS	National Institute of Environmental Health Sciences
2567	NIIN	National Item Identification Number
2568	NIMA	National Imagery and Mapping Agency (became NGA)
2569	NIMBY	Not In My Back Yard (See NOME)
2570	NIMG	Not In My Generation
2571	NIN	Nine Inch Nails (band)
2572	NIPR	National Institute of Polar Research (Japan)
2573	NIR	Northern Ireland (FIFA trigram; not eligible for an ISO 3166 or IOC trigram)
2574	NISAC	U.S. National Infrastructure Simulation and Analysis Center
2575	NISCAP	NSA Information System Certification and Accreditation Program
2576	NISER	National Institute of Science Education and Research
2577	NIST	National Institute of Standards and Technology
2578	NITFS	National Imagery Transmission Format Standard
2579	NIU	Niue (ISO 3166 trigram)
2580	nJ	Nanojoule
2581	NJ	New Jersey (postal symbol)
2582	NJHS	National Junior Honor Society
2583	NJPW	New Japan Pro Wrestling
2584	nK	Nanokelvin
2585	NKA	No Known Allergies
2586	nL	Nanolitre
2587	NLB	Non-Linear Battlefield
2588	NLD	Netherlands (ISO 3166 trigram)
2589	NLF	National Liberation Front (disambiguation)
2590	NLL	National Lacrosse League
2591	NLW	Non-Lethal Weapon
2592	nm	Nanometre
2593	NM	New Mexico (postal symbol)
2594	NMCI	Navy Marine Corps Intranet
2595	NMCS	Not Mission Capable Supply (SM&R code)
2596	NMD	U.S. National Missile Defense
2597	NMN	No middle name
2598	NMR	Nuclear Magnetic Resonance
2599	NMSG	NATO Modelling and Simulation Group
2600	nN	Nanonewton
2601	NNE	North North-East
2602	NNSA	U.S. National Nuclear Security Administration
2603	NNW	North North-West
2604	No	Nobelium
2605	NOAA	U.S. National Oceanic and Atmospheric Administration
2606	NOAF	Norwegian Air Force
2607	NOAO	National Optical Astronomy Observatory
2608	NOC	UK. National Oceanography Centre
2609	NODEF	NATO Oceanographic Data Exchange Format
2610	NOGI	New Orleans Grande Isle (award for diving)
2611	NOLF	Navy OutLying Field
2612	NOME	Not on Mars Either
2613	NOME	Not on Mars Either (see NIMBY)
2614	NOR	Norway (ISO 3166 trigram)
2615	NORELPREF	No religious preference
2616	NORTHAG	Northern Army Group
2617	NOSA	NATO OSI Security Architecture
2618	NOTAFLOF	No One Turned Away For Lack Of Funds
2619	NOW	National Organization for Women
2620	NP	Nepal (ISO 3166 and FIPS 10-4 country code digram)
2621	NPB	Nippon Professional Baseball
2622	NPCS	Non-Passenger Coaching stock (in Railways)
2623	NPD	Nationaldemokratische Partei Deutschlands (German)
2624	NPDI	New Product Development and Introduction
2625	NPG	Needline/Network Participation Group
2626	NPH	Normal Pressure Hydrocephalus
2627	NPO	nothing by mouth
2628	NPOV	Neutral Point Of View
2629	NQ	Dronning Maud Land (ISO 3166 digram; obsolete 1983)
2630	NR	Nauru (ISO 3166 and FIPS 10-4 country code digram)
2631	NRA	National Rifle Association
2632	NRAO	National Radio Astronomy Observatory
2633	NRDC	(U.S.) Natural Resources Defense Council
2634	NREL	U.S. National Renewable Energy Laboratory
2635	NRK	Norsk Rikskringkasting (Norwegian Broadcasting Corporation)
2636	NRMP	National Resident Matching Program (U.S. medicine)
2637	NRO	U.S. National Reconnaissance Office
2638	NRT	Near Real Time
2639	NRU	Nauru (ISO 3166 trigram)
2640	ns	Nanosecond
2641	nS	Nanosiemens
2642	NSABB	National Science Advisory Board for Biosecurity
2643	NSAID	Non-Steroidal Anti-Inflammatory Drug
2644	NSB	Norges Statsbaner (Norwegian State Railways)
2645	NSC	National Security Council
2646	NSDL	National Science Digital Library (US)
2647	NSG	National System for Geospatial-Intelligence
2648	NSN	National Stock Number
2649	NSNA	National Student Nurses' Association
2650	NSO	National Standardization Office (ABCA)
2651	NSS	(U.S.) Naval Simulation System
2652	NST	(UK) Nimrod Software Team
2653	NSTAC	National Security Telecommunications Advisory Committee
2654	NSW	New South Wales (postal symbol)
2655	nT	Nanotesla
2656	NTDS	Naval Tactical Data System
2657	NTP	Network Time Protocol
2658	NTR	Network Time Reference
2659	NTRA	National Thoroughbred Racing Association
2660	NTSB	National Transportation Safety Board
2661	NTV	Non-Tactical Vehicle
2662	NTY	(Internet Abbreviations:) Not Tested Yet; (Alternatively) No Thank You
2663	NTZ	Iraq-Saudi Arabia Neutral Zone (ISO 3166 trigram; obsolete 1993)
2664	NUTS	Nuclear Utilization Target Selection
2665	NUWC	U.S. Naval Undersea Warfare Center
2666	nV	Nanovolt
2667	NVEOL	Night Vision and Electro-Optics Laboratory
2668	NVG	Night Vision Goggles
2669	NVL	Night Vision Laboratory
2670	nW	Nanowatt
2671	NW	North-West
2672	NW	Nuclear Weapon
2673	NWA	National Wrestling Alliance
2674	NWF	National Wildlife Federation
2675	NWFZ	Nuclear-Weapon-Free Zone
2676	NWHN	U.S. National Women's Health Network
2677	nWo	New World Order (see article for explanation of idiosyncratic capitalization)
2678	NWOAHM	New Wave of American Heavy Metal
2679	NWOBHM	New Wave of British Heavy Metal (sometimes pronounced /n.ˈwɒbm/ as if it were an acronym)
2680	NWRA	National Wildlife Rehabilitators Association
2681	NWSL	National Women's Soccer League (U.S.)
2682	NWT	North-West Territories
2683	NXA	21st arcade game in the Pump It Up series
2684	NXD	Native XML
2685	NXE	New Xbox Experience
2686	NXG	New Cross Gate station
2687	NXL	National XBall League
2688	NXN	Nike Cross Nationals
2689	NY	New York (postal symbol)
2690	NYC	New York City
2691	NYHA	New York Heart Association
2692	NYO	National Youth Orchestra of Great Britain
2693	NYSE	New York Stock Exchange
2694	NZ	New Zealand (ISO 3166 and FIPS 10-4 country code digram)
2695	NZC	New Zealand Cricket
2696	NZL	New Zealand (ISO 3166 trigram)
2697	NzL	Noze looan (online/event listings)
2698	NZOSS	New Zealand Open Source Society
2699	NZRU	New Zealand Rugby Union
2700	OAC	On Approved Credit
2701	OAP	Old Age Pensioner (UK)
2702	OARSI	Osteoarthritis Research Society International
2703	OAS	Organization of American States
2704	OASIS	Ontario Agencies Supporting Individuals with Special Needs
2705	OASIS	Ontario Association of Sewage Industry Services
2706	OASP	Operational Analysis Support Paper/Plan
2707	OAU	Organization for African Unity
2708	OBE	Officer of the Order of the British Empire
2709	OBX	Outer Banks (North Carolina)
2710	OC	Officer Commanding
2711	OCD	Obsessive-Compulsive Disorder
2712	OCFS	Oracle Cluster File System
2713	OCFS2	Oracle Cluster File System Release 2
2714	OCMCC	[2] Orchard County MCC
2715	OCN	Oncology Certified Nurse
2716	OCO	Oort Cloud Object
2717	OCR	Optical Character Recognition
2718	OCS	see entry
2719	ODAS	OCA-DLR Asteroid Survey
2720	ODBC	Open DataBase Connectivity
2721	OEA	(U.S.) Office of Economic Adjustment
2722	OECD	Organisation for Economic Co-operation and Development (international)
2723	OED	Oxford English Dictionary
2724	OEG	Operation Exposure Guidance
2725	OEIS	On-Line Encyclopedia of Integer Sequences
2726	OEM	Original Equipment Manufacturer
2727	OFA	Occipital Face Area
2728	OFDA	U.S Agency for International Development's Office of Foreign Disaster Assistance
2729	OGC	Open Geospatial Consortium
2730	OGD	Other Government Department
2731	OGO	Other Government Organization
2732	OH	Ohio (postal symbol)
2733	OHC	OverHead-Cam engine
2734	OHHLA	Original Hip-Hop Lyrics Archive
2735	OHIP	Ontario Health Insurance Plan
2736	OHMS	On Her (or His) Majesty's Service (also written: O.H.M.S.)
2737	OHP	Observatoire de Haute-Provence
2738	OHSS	Ovarian Hyperstimulation Syndrome
2739	OIC	Officer In Charge
2740	OIF	Operation Iraqi Freedom
2741	OIOC	Oriental & India Office Collections (in the British Library)
2742	OJT	On-the-Job Training
2743	OKC	Oklahoma City
2744	OLED	Organic Light-Emitting Diode
2745	OLS	Operational Linescan System
2746	OMD	Orchestral Manoeuvres in the Dark (1980s pop group)
2747	OME	Osaka Mercantile Exchange
2748	OMFG	Oh My Fucking God
2749	OMG	Oh My God or Or My Gosh
2750	OMGW	Oh My Gosh it's Windy
2751	OMN	Oman (ISO 3166 trigram)
2752	OMNCS	U.S. Office of the Manager for the National Communications System
2753	OMP	Order of Mapungubwe in Platinum
2754	OMS	Order of Mapungubwe in Silver
2755	OMT	Object Model Template
2756	ON	Ontario (postal symbol)
2757	ONC	Orthopaedic Nurse Certified
2758	ONG	Orthodontic National Group
2759	ONI	(U.S.) Office of Naval Intelligence
2760	ONS	Operational Needs Statement
2761	OOAD	Object Oriented Analysis and Design
2762	OOBE	Out-of-body experience
2763	OOCL	Orient Overseas Container Line
2764	OODA	Observation,Orientation,Decision,Action loop (a.k.a. Boyd's Loop)
2765	OOF	Out of Facility
2766	OOMF	One Of My Followers
2767	OOO	Out Of the Office
2768	OOTW	Operations Other Than War
2769	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
2770	OPAC	Online Public Access Catalogue
2771	OPCON	Operational control
2772	OPCW	Organisation for the Prohibition of Chemical Weapons
2773	OPEC	Organization of the Petroleum Exporting Countries
2774	OPFOR	Opposing force
2775	OPINTEL	Operational Intelligence
2776	OPLAN	Operation plan (also OpPlan)
2777	OPORD	Operation order
2778	OPSEC	Operations security,Open Platform for Security
2779	OPSI	Overwhelming post splenectomy infection,UK Office of Public Sector Information
2780	OPTAR	Operational target
2781	OPV	Offshore Patrol Vessel
2782	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)
2783	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
2784	ORAU	Oak Ridge Associated Universities
2785	ORB	Object Request Broker
2786	ORBAT	Order of Battle
2787	ORD	Office of Research and Development,Operational Requirements Document
2788	ORF	Operational iness Float
2789	ORISE	Oak Ridge Institute for Science and Education
2790	ORNL	Oak Ridge National Laboratory
2791	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
2792	ORSA	Oxacillin-resistant Staphylococcus aureus,Operations Research Society of America
2793	OS	Operating System
2794	Os	Osmium
2795	OSA	Order of St. Augustine
2796	OSCE	Organisation for Security and Cooperation in Europe
2797	OSD	U.S. Office of the Secretary of Defense,On-screen Display
2798	OSDL	Open Source Development Labs
2799	OSE	Own Separate Entrance
2800	OSERS	U.S. Department of Education Office of Special Education and Rehabilitative Services
2801	OSETI	Optical SETI also Optical SETI
2802	OSHA	Occupational Safety and Health Administration
2803	OSI	Office of Strategic Influence,Ontario Swine Improvement,Open Source Initiative,Open Systems Interconnection
2804	OSIA	(U.S.) On-Site Inspection Agency
2805	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)
2806	OSL	Open Source License, Optically Stimulated Luminescence, Orbiting Solar Laboratory
2807	OSM	One Saturday Morning
2808	OSOTPBOIAS	One Sec,On The Phone,Be Off In A Sec
2809	OSPA	Operations Security Professional's Association site of OSPA
2810	OSPA	Oregon School Psychologists Association [3]
2811	OSRH	Oružane Snage Republike Hrvatske (en: Armed forces of the Republic of Croatia)
2812	OSU	Ohio State University,Oklahoma State University
2813	OTA	Office of Technology Assessment, Orthodontic Technicians Association
2814	OTAC	Orthodontic Technicians Association Conference,Orthodontic Technicians Association Council
2815	OTC	Over-The-Counter (drugs)
2816	OTD	Off the derech (referring to an Orthodox Jew who has stopped practicing the tenets of his or her faith)
2817	OTEA	(U.S. Army) Operational Test Evaluation Agency
2818	OTI	Office of Transition Initiatives (United States Agency for International Development)
2819	OTOH	On The Other Hand
2820	OTS	Off the scale,sexually untouchable except for a lot of money
2821	OTSBH	Over The Shoulder Boulder Holder
2822	OTW	On The Way
2823	OTYBL	Over To You Blue Leader
2824	OTYRL	Over To You Red Leader
2825	OU	University of Oklahoma
2826	OW	Old Wykehamist
2827	OWN	Oprah Winfrey Network
2828	OX	IATA code for Orient Thai Airlines
2829	OXC	Optical cross-connect
2830	OXM	Official Xbox Magazine
2831	OXT	Oxytocin
2832	OZ	(?) Australia
2833	p	pico
2834	P2P	Peer-to-peer (networking)
2835	pA	picoampere
2836	PAA	Position Area for Artillery
2837	PABX	Private Automated Branch eXchange (company phone system)
2838	PACOM	(U.S.) Pacific Command
2839	PADI	Professional Association of Diving Instructors
2840	PAEK	PolyArylEtherKetone
2841	PAFC	Plymouth Argyle Football Club
2842	PAH	Polycyclic aromatic hydrocarbon
2843	PAHO	Pan American Health Organization
2844	PAK	Pakistan (ISO 3166 trigram)
2845	PAM	Precision Attack Missile
2846	PANS	Pretty Advanced/Awesome Network Services (cf. POTS)
2847	PARC	Palo Alto Research Center
2848	PAROS	Prevention of an Arms Race in Outer Space (treaty)
2849	PARP	(NATO Partnership for Peace) Planning And Review Process
2850	PARWIG	Power Augmented Ram Wing In Ground (aeroplane wing shape)
2851	PAS	See entry
2852	PASR	Personnel Accounting and Strength Reporting
2853	PATH	Port Authority Trans-Hudson
2854	PAYD	Pay As You Drive
2855	PAYE	Pay As You Earn
2856	Pb	Lead (Latin Plumbum)
2857	PB	PolyButylene
2858	PBB	PolyBrominated Biphenyl
2859	PBCK	Problem Between Chair and Keyboard (computer help desk in-joke)
2860	PBD	PolyButaDiene
2861	PBDE	PolyBrominated Diphenyl Ether
2862	PBI	PolyBenzImidazole
2863	PBN	PolyButylene Naphthalate
2864	PBOH	Please Become Old History
2865	PBT	PolyButylene Terephthalate
2866	PBX	Private Branch eXchange (company phone system)
2867	pC	picocoulomb
2868	PCAS	Planet-Crossing Asteroid Survey
2869	PCB	see entry
2870	PCCB	Porsche Ceramic Composite Brake
2871	PCCIP	President's Commission on Critical Infrastructure Protection
2872	PCE	PerChlorEthylene
2873	PCIe	Peripheral Component Interconnect Express (computer bus)
2874	PCL	Passive Coherent Location
2875	PCMCIA	Personal Computer Memory Card International Association (People Can't Memorise Computer-Industry Acronyms)
2876	PCN	Pitcairn Islands (ISO 3166 trigram)
2877	PCPI	Physician Consortium for Performance Improvement (AMA)
2878	PCR	Polymerase chain reaction
2879	PCSSD	Pulaski County Special School District
2880	PCZ	Panama Canal Zone (ISO 3166 trigram; obsolete 1980)
2881	Pd	Palladium
2882	PD	Product Director—Example: CERDEC Product Director C4ISR and Network Modernization
2883	PDL	Pure Dumb Luck (Texan punk band)
2884	PDN	Pull-Down Network
2885	PDRY	People's Democratic Republic of Yemen (obsolete since 1990)
2886	PDT	Pacific Daylight [Saving] Time (UTC-7 hours)
2887	PE	Professional Engineer
2888	PEBCAC	Problem Exists Between Chair and Computer (IT help desk in-joke)
2889	PEBKAC	Problem Exists Between Keyboard and Chair (ditto)
2890	PEEK	PolyEtherEtherKetone
2891	PEET	Partnerships for Enhancing Expertise in Taxonomy
2892	PEK	PolyEtherKetone
2893	PEPFAR	President's Emergency Plan For AIDS Relief
2894	PER	Peru (ISO 3166 trigram)
2895	perl	usually lower case Practical Extraction and Report Language
2896	PES	PolyEtherSulfone
2897	PEST	UK Public Engagement with Science and Technology
2898	PETE	PolyEthyleneTErephthalate
2899	PETP	PolyEthyleneTerePhthalate
2900	pF	picofarad
2901	PFD	Permanent Fund Dividend = personal flotation device
2902	PFE	Permanent Forest Estate
2903	PfP	Partnership for Peace
2904	Pg	petagram
2905	pg	picogram
2906	PGCE	Postgraduate Certificate in Education
2907	PGD	Pre-implantation Genetic Diagnosis
2908	PGENI	Pharmaco-Genetics for Every Nation Initiative
2909	PGH	Pre-implantation Genetic Haplotyping
2910	PGM	Precision-Guided Munition
2911	PGP	Pretty Good Privacy
2912	PHL	Philippines (ISO 3166 trigram)
2913	PHQ	Patient Health Questionnaire
2914	Pi	Pebi
2915	PIB	PolyIsoButylene
2916	PIC	Person In Charge
2917	PICNIC	Problem In Chair Not In Computer
2918	PICS	Private Investment Capital Subscription
2919	PIF	Partners in Flight
2920	PIG	Pipeline Inspection Gauge
2921	PIN	Personal Identification Number
2922	PINF	People In Need Foundation (Czech charitable organisation)
2923	PIPA	Program on International Policy Attitudes
2924	PIR	Priority Intelligence Requirement
2925	PIRA	Provisional Irish Republican Army
2926	PIREPS	Pilot Reports
2927	PITA	Pain In The Ass
2928	PJ	petajoule
2929	pJ	picojoule
2930	PJHQ	Permanent Joint Headquarters
2931	PKE	Partnership of Kindermusik Educators [1] &[2] & [2]
2932	PKI	Public Key Infrastructure (cryptography)
2933	PKU	Phenylketonuria
2934	pL	picolitre
2935	PLAID	Precision Location and Identification
2936	PLB	Personal Locator Beacon
2937	PLC	Public Limited Company (British)
2938	PLCC	Plastic Leaded Chip Carrier (electronics)
2939	PLD	Probable Line of Deployment
2940	PLEBS	People Lacking Everyday Basic Skills
2941	PLF	Parachute Landing Fall
2942	PLIF	Planar Laser-Induced Fluorescence
2943	PLL	Phase-Locked Loop (electronics)
2944	PLM	Polarized Light Microscope/Microscopy
2945	PLMBA	Phospholipid Bilayer Microarray
2946	Pln	Platoon
2947	PLO	Palestine Liberation Organization
2948	PLOKTA	Press Lots Of Keys To Abort
2949	PLP	Platonic Life Partner
2950	PLUTO	Pipe Line Under The Ocean
2951	PLW	Palau (ISO 3166 trigram)
2952	pm	picometre
2953	PMC	Primary Motor Cortex
2954	PMI	Positive Material Identification
2955	PMID	PubMed Identifier
2956	PMMA	PolyMethylMethAcrylate
2957	PMS	Premenstrual Syndrome
2958	PMSL	Piss Myself Laughing (Internet shorthand)
2959	PMT	Premenstrual Tension (UK) (see Premenstrual Syndrome)
2960	pN	piconewton
2961	PNAC	Project for the New American Century
2962	PNVS	Pilot Night Vision Sensor
2963	Po	Polonium
2964	PO	Post Office
2965	PO	Purchase Order
2966	POCD	Post-Operative Cognitive Dysfunction
2967	pod	Plain Old Documentation
2968	POFF	Plain Old Flat File
2969	POGO	Project On Government Oversight
2970	POI	Program Of Instruction
2971	POK	Plane Of Knowledge
2972	POLAD	Political Advice
2973	POMDP	Partially observable Markov decision process
2974	PooS	Poo Sniffer (Internet shorthand)
2975	POS- Point Of Sale terminal (retail industry transaction computers)	Piece Of S**t
2976	POSH	Port Outbound Starboard Home (alleged)
2977	POSSLQ	Person of the Opposite Sex Sharing Living Quarters
2978	POT	Plane Of Tranquility
2979	POTS	Plain Old Telephone Service (cf. PANS),Postural Orthostatic Tachycardia Syndrome
2980	POTUS	President of the United States
2981	POV	Point of view
2982	POW	Prisoner of war
2983	PPASC	(U.S.) Plans and Program Analysis Support Center
2984	PPCLI	Princess Patricia's Canadian Light Infantry (regiment)
2985	PPLI	Precise Participant Location & Identification
2986	PPM	Project Planning and Management
2987	PPO	PolyPhenylene Oxide
2988	PPQN	Pulses Per Quarter Note (ditto)
2989	PPQT	Pre-Production Qualification Test
2990	PPV	Pay-per-view
2991	Pr	Pastor, Priest
2992	PR	Public Relations
2993	Prb	Presbyter
2994	PRBO	Point Reyes Bird Observatory
2995	PRC	People's Republic of China
2996	PRD	CERDEC Product Realization Directorate
2997	PRFG	Partial Fog (METAR Code)
2998	PRI	Puerto Rico (ISO 3166 trigram)
2999	PRK	Democratic People's Republic of Korea (ISO 3166 trigram)
3000	PRM	Personnel iness Management
3001	PRY	Paraguay (ISO 3166 trigram)
3002	Ps	petasecond
3003	pS	picosiemens
3004	PSG	Pacific Seabird Group
3005	PSI	Portable Source Initiative
3006	PSI	Pounds per square inch
3007	PSS	Personnel System Support
3008	PST	Pacific Standard Time (UTC-8 hours)
3009	PSU	Pennsylvania State University
3010	PsyOp	Psychological Operations
3011	pT	picotesla
3012	Pt	Platinum
3013	PTA	Parent-Teacher Association
3014	PTAL	Public Transport Accessibility Level
3015	PTES	People's Trust for Endangered Species
3016	PTFE	PolyTetraFluoroEthylene
3017	PTI	Pardon the Interruption
3018	PTSD	Post-Traumatic Stress Disorder
3019	Pu	Plutonium
3020	Pub	Publication
3021	PUG	PET Users Group
3022	PUN	Pull-Up Network
3023	PUP	Pull-Up Point
3024	PUS	United States Miscellaneous Pacific Islands (ISO 3166 trigram; obsolete 1986)
3025	PV	petavolt
3026	pV	picovolt
3027	PvE	Player versus Environment
3028	PvP	Player versus Player
3029	PVR	Personal Video Recorder
3030	PvZ	Plants vs. Zombies
3031	PW	Palau (postal symbol; ISO 3166 digram)
3032	pW	picowatt
3033	PWA	Pirates With Attitude
3034	PWBA	Pension and Welfare Benefits Administration
3035	PWC	PieceWise Constant (describing a mathematical function)
3036	PwC	PricewaterhouseCoopers (international accounting firm)
3037	PWL	PieceWise Linear (describing a mathematical function)
3038	PWLC	PieceWise Linear and Concave/Convex (describing a mathematical function)
3039	PWR	Pressurized Water Reactor
3040	PX	Post eXchange
3041	PYF	French Polynesia (ISO 3166 trigram)
3042	PYMWYMI	Put Your Money Where Your Mouth Is
3043	Q1	First Quarter
3044	Q2	Second Quarter
3045	Q3	Third Quarter
3046	Q4	Fourth Quarter
3047	QA	Qatar (FIPS 10-4 country code; ISO 3166 digram)
3048	Qantas	Queensland And Northern Territory Aerial Services
3049	QAT	Qatar (ISO 3166 trigram)
3050	QB	Quarterback (football)
3051	QCD	Quantum ChromoDynamics
3052	QDR	Quadrennial Defense Review
3053	QEH	Queen Elizabeth's Hospital
3054	QK	Air Canada Jazz (IATA airline designator)
3055	QNH	Regional mean sea level atmospheric pressure (aeronautical Q code)
3056	QPS	Quark Publishing System
3057	QSCAT	Quick Scatterometer satellite
3058	QSL	Québec Sign Language
3059	QSO	Quasi-Stellar Object
3060	Quango	(British Commonwealth) QUasi Autonomous Non-Governmental Organisation
3061	Quasar	Quasi-stellar radio source
3062	QUB	Queen's University Belfast
3063	QUIET	Q and U Imaging ExperimenT (Q and U are the Stokes parameters of the CMBR polarization)
3064	QZ	Awair (IATA airline designator)
3065	R2I	Resistance to Interrogation
3066	RA	Radio Australia
3067	Ra	Radium
3068	RAAF	Royal Australian Air Force
3069	Rabobank	Raiffeisen-Boerenleenbank (from the two banks that merged to form the modern company)
3070	RACK	Risk Aware Consensual Kink (SM phrase)
3071	Racon	RAdar beaCON
3072	RADA	Royal Academy of Dramatic Art
3073	Radar	Radio Detection And Ranging
3074	RadB	Rad51/Dmc1 homologous protein
3075	RADb	Routing Assets Data Base
3076	RADC	Region Air Defence Commander
3077	RAE	UK Royal Aircraft Establishment (-1991)
3078	RAGBRAI	Register's Annual Great Bicycle Ride Across Iowa
3079	RAM	Royal Air Maroc
3080	Ramark	RAdar MARKer
3081	RAOC	Rear Area Operation Centre
3082	RARDE	UK Royal Armament Research and Development Establishment (1962-1991)
3083	RARE	Rapid Acquisition with Relaxation Enhancement (MRI technique)
3084	RATELO	Radiotelephone Operator
3085	Rb	Rubidium
3086	RB	Running Back (football)
3087	RBI	Runs Batted In
3088	RC	see entry
3089	RCAF	Royal Canadian Air Force
3090	RCC	Rescue Co-ordination Centre
3091	RCCO	Royal Canadian College of Organists
3092	RCHA	Royal Canadian Horse Artillery (regiment)
3093	RCMP	Royal Canadian Mounted Police
3094	RD	Radio Disney
3095	RDD	Radiological Dispersion Device
3096	RDM	Remotely Delivered/Deliverable Mine
3097	RDT	Remote Digital Terminal
3098	RDV	Remote Detection Vehicle
3099	Re	Rhenium
3100	RE	Royal Engineers
3101	REACT	Remote Electronically Activated Control Technology
3102	REAM	Retired Educators Association of Minnesota
3103	RECCE	Reconnaissance
3104	REEF	Reef Environmental Education Foundation
3105	REM	Rapid Eye Movement (sleep phase),Rosicrucian Egyptian Museum
3106	REME	Royal Electrical and Mechanical Engineers
3107	RERC	Rehabilitation Engineering Research Center
3108	RESNA	Rehabilitation Engineering and Assistive Technology Society of North America
3109	REU	Réunion (ISO 3166 trigram)
3110	Rf	Rutherfordium
3111	RFD	Request for Documentation
3112	RFE	Request for Evaluation
3113	RFEF	Real Federación Española de Fútbol (Spanish for Royal Spanish Football Federation)
3114	RFF	Right of First Refusal (legal term)
3115	RFID	Radio Frequency IDentification
3116	RFL	Rugby Football League
3117	RFP	Request for Proposal
3118	RFQ	Request for Quotation
3119	RFT	Request for Tender
3120	RFU	Rugby Football Union
3121	RG	Republican Guard
3122	Rg	Roentgenium
3123	RGB	Red Green Blue (colour model)
3124	RGBI	Red Green Blue Intensity (ditto)
3125	Rh	Rhodium
3126	RH	Southern Rhodesia (ISO 3166 digram; obsolete 1980)
3127	RHIC	Relativistic Heavy Ion Collider
3128	RHLI	Royal Hamilton Light Infantry (Canadian militia regiment)
3129	RHO	Southern Rhodesia (ISO 3166 trigram; obsolete 1980)
3130	RHU	Replacement Holding Unit
3131	RI	Rhode Island (postal symbol)
3132	RIAA	Recording Industry Association of America
3133	RIBA	Royal Institute of British Architects
3134	RIFA	Red imported fire ant
3135	RILA	Retail Industry Leaders Association
3136	RIMVS	Retinal Imaging Machine Vision System
3137	RINO	Republican In Name Only[1]
3138	RISC	Reduced Instruction Set Computer
3139	RJD	Reduced Julian Day
3140	RKBA	Right to Keep and Bear Arms (Second Amendment to the United States Constitution)
3141	RKO	Radio-Keith-Orpheum Pictures
3142	RLP	Recognised [Operating/Operational] Land Picture
3143	RLS	Restless Leg Syndrome
3144	RLY	Rally Point
3145	RM	see separate disambiguation page
3146	RMC	Robert Menzies College
3147	RMDA	Records Management and Declassification Agency
3148	RMP	Recognised [Operating/Operational] Maritime Picture
3149	RN	Radio Netherlands
3150	Rn	Radon
3151	RNA	RiboNucleic Acid
3152	RNAD	Royal Naval Armaments Depot (UK)
3153	RNPS	Radio Network Planning System
3154	RNZ	Radio New Zealand
3155	RNZI	Radio New Zealand International
3156	ROA	Rate Of Ascent
3157	ROE	Rules Of Engagement
3158	ROFLOL	Rolling On the Floor Laughing Out Loud
3159	ROH	Ring of Honor
3160	ROK	Republic of Korea
3161	ROP	Render Output Pipeline
3162	ROPE	Research Opportunity and Performance Evidence
3163	ROS	Reactive Oxygen Species
3164	ROU	Romania (ISO 3166 trigram)
3165	ROV	Remotely Operated Vehicle
3166	ROZ	Restricted Operations Zone
3167	RPA	Regional Plan Association
3168	RPD	Recognition-Primed Decision-making
3169	RPF	Rwandan Patriotic Front
3170	RPL	Reverse Polish Lisp
3171	rpm	revolutions per minute
3172	RPN	reverse Polish notation
3173	rps	revolutions per second
3174	RPV	Remotely Piloted Vehicle
3175	RQ	Puerto Rico (FIPS 10-4 territory code)
3176	RRB	Railroad Retirement Board
3177	RRN	Recurrence Rate Number
3178	RRP	Recurrent Respiratory Papillomatosis
3179	RRS	Racing Rules of Sailing
3180	RRSP	Registered Retirement Savings Plan (Canada; roughly equivalent to the IRA in the U.S.)
3181	RS	Russia (FIPS 10-4 country code)
3182	RSI	Repetitive Strain Injury
3183	RSJ	Rolled Steel Joist (construction)
3184	RSN	Real Soon Now (coined by author Jerry Pournelle)
3185	RSPB	(UK) Royal Society for the Protection of Birds
3186	RSPCA	Royal Society for the Prevention of Cruelty to Animals
3187	RSR	Required Supply Rate
3188	RSRE	UK Royal Signals and Radar Establishment (1976-1991)
3189	RSRI	Red Sands Research Institute
3190	RSS	Really Simple Syndication
3191	RTA	Road traffic accident (British)
3192	RTBF	Radio-Télévision belge de la Communauté française
3193	RTF	Rich Text Format
3194	RTFM	the Fucking/Fine Manual
3195	RTG	Radio-isotope Thermoelectric Generator also used for Rubber Tyred Gantry crane
3196	RTI	Run-Time Infrastructure (Simulation)
3197	RTL	see entry
3198	RTP	Real-time Transport Protocol
3199	RTS	see entry
3200	RTT	Round Trip Timing
3201	RU	Russia (ISO 3166 digram)
3202	Ru	Ruthenium
3203	RUC	Royal Ulster Constabulary
3204	RUS	Russia (ISO 3166 trigram)
3205	RUSI	Royal United Services Institute for Defence Studies
3206	RW	Rwanda (ISO 3166 and FIPS 10-4 country code digram)
3207	RWA	Rwanda (ISO 3166 trigram)
3208	RWH	Rain Water Harvesting
3209	RWR	Radar Warning Receiver
3210	RWS	Remote Weapon Station
3211	RX	Receive
3212	SBNO	Standing but not operating (in reference to amusement parks)
3213	SCOTUS	Supreme Court of the United States
3214	SCROTUS	So-called Ruler of the United States
3215	SDHC	Secure Digital High Capacity
3216	SDXC	Secure Digital eXtended Capacity
3217	SG	Senegal (FIPS 10-4 country code), Singapore (ISO 3166 digram), Snow Grains (METAR Code), Study Group
3218	SGOTUS	Second Gentleman of the United States
3219	SHO	Showtime (see also sho.com)
3220	SIRI	Service Interface for Real Time Information
3221	Siri	Speech Interpretation and Recognition Interface (Apple iOS software)
3222	SLOTUS	Second Lady of the United States (the vice president's wife)
3223	SoCon	Southern Conference (U.S. college sports)
3224	STB	Surface Transportation Board[2]
3225	SWAC	Southwestern Athletic Conference
3226	SWAN	System for Wearable Audio Navigation
3227	SWAT	Special Weapons And Tactics
3228	SWF	Single White Female
3229	Ta	Tantalum
3230	TAACOM	U.S. Theater Army Area Command
3231	TAADCOORD	Theatre Army Air Defence Co-ordinator
3232	TAAR	Trace Amine-Associated Receptor
3233	TAC	U.S. Tactical Air Command (1946-1992)
3234	TACAN	Tactical Air Navigation
3235	TACCO	Tactical Coordinator
3236	TACCSF	U.S. Theater Aerospace Command & Control Simulation Facility
3237	TACDAR	Tactical Detection And Reporting
3238	TACSOP	Tactical SOP (Standing Operating Procedure)
3239	TADIL	Tactical Digital Information Link
3240	TAI	Target[ed] Area of Interest
3241	TAJ	Tom and Jerry
3242	TAJT	Tom and Jerry Tales
3243	TALES	Technical Advice and Lexicon for Enabling Simulation
3244	TANJ	There Ain't No Justice (used as expletive in the Ringworld novels)
3245	TANP	Terrain-Aware Network Planner
3246	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)
3247	TAPPS	Texas Association of Private and Parochial Schools
3248	TARDIS	Time And Relative Dimension In Space (from Doctor Who)
3249	TAS	Tasmania (postal symbol)
3250	TASER	Thomas A. Swift's Electric Rifle
3251	TASM	Tactical Air-to-Surface Missile
3252	TAT	Tourism Authority of Thailand
3253	TATP	TriAcetone TriPeroxide
3254	TATT	Tired All The Time (medical diagnosis in-joke)
3255	Tb	Terbium
3256	TB	Tuberculosis
3257	TBA	to be announced
3258	TBBPA	TetraBromoBisPhenol-A
3259	TBD	to be done, or: to be documented, or: to be determined, or: to be decided
3260	TBF	to be fair
3261	TBH	To Be Honest
3262	TBL	Turkish Basketball League
3263	TBS	Turner Broadcasting System
3264	TBT	Tributyltin
3265	Tc	Technetium
3266	TCAA	Top Counter-Assault Agents
3267	TCAS	Traffic Collision Avoidance System
3268	TCCCS	Tactical Command,Control and Communication System
3269	TCD	Chad (ISO 3166 trigram)
3270	TCHD	Truck Cargo Heavy Duty
3271	TCL	Tool Command Language
3272	TCM	Turner Classic Movies
3273	TCU	Texas Christian University
3274	TCW	Tasty Coma Wife
3275	TCWMS	Tele-Center Workforce Management System
3276	TDA	The Disney Afternoon
3277	TDL	Tactical Data Link
3278	TDM	Time-Division Multiplexing
3279	TDMA	Time Division Multiple Access
3280	TDP	Technology Demonstration Programme
3281	TDRS	Tracking Data and Relay Satellite
3282	Te	Tellurium
3283	TEAL	Tasman Empire Airways Limited
3284	Team	Together everyone achieves more
3285	TEAMS	The East African Marine System (fiber optic cable)
3286	TED	Technology Entertainment Design prize
3287	TENCAP	Tactical Exploitation of National Capabilities
3288	TERS	Tactical Event Reporting System
3289	TES	Tactical Event System
3290	TEST	Thesaurus of Engineering and Scientific Terms
3291	TEU	Twenty-foot equivalent unit (cargo capacity)
3292	TeVeS	Tensor Vector Scalar theory
3293	TFMPP	Trifluorophenylmethylpiperazine
3294	TFR	Total Fertility Rate
3295	TFT	Thin-Film Transistor
3296	Tg	Teragram
3297	TG	Togo (ISO 3166 digram)
3298	TGO	Togo (ISO 3166 trigram)
3299	Th	Thorium
3300	THA	Thailand (ISO 3166 trigram)
3301	THAAD	Terminal High Altitude Area Defence
3302	THEGENTRY	The High-End Group of Earth's New Technologies Research Yield
3303	THEL	Tactical High Energy Laser ACTD
3304	THG	Tetrahydrogestrinone
3305	TIA	Total Information Awareness initiative
3306	TIA	Transient Ischemic Attack
3307	TIALD	Thermal Imaging and Airborne Laser Designation
3308	TIBS	Tactical Information Broadcast System
3309	TIC	Troops In Contact
3310	TIGERS	Topologically Integrated Geographic Encoding and Referencing System
3311	TINC	There Is No Cabal
3312	TIP	Thermal Identification Panel
3313	tits	Toes in the Sand
3314	TJD	Truncated Julian Day
3315	TJK	Tajikistan (ISO 3166 trigram)
3316	TKL	Tokelau (ISO 3166 trigram)
3317	TKM	Turkmenistan (ISO 3166 trigram)
3318	Tl	Thallium
3319	TLA	Three-Letter Abbreviation/Acronym
3320	TLAM	Tomahawk Land Attack Missile
3321	TLATOJL	The Life and Times of Juniper Lee
3322	TLPM	T1 Line Performance Monitor
3323	Tm	Terametre
3324	TMAP	Texas Medication Algorithm Project
3325	TMC	The Movie Channel
3326	TMD	Theatre Missile Defence
3327	TMDK	The Mighty Don't Kneel (Australian professional wrestling stable also active in Japan)
3328	TMI	Too Much Information
3329	TMJ	TemporoMandibular Joint (syndrome)
3330	TMNT	Teenage Mutant Ninja Turtles
3331	TMPG	Transparent Multi-Platform Gateway
3332	TMR	Twin Main Rotors (helicopter type)
3333	TMS	Transcranial Magnetic Stimulation
3334	TMT	Thirty Meter Telescope
3335	TMTOWTDI	There's Than One Way To Do It (from Perl)
3336	TNA	Total Nonstop Action Wrestling
3337	TNO	Trans-Neptunian Object
3338	TOBS	Time of OBServation
3339	TOC	Table Of Contents, Tactical Operations Centre, Temporo-Occipital transition Cortex, Top of Concrete
3340	TOG	Togo (IOC and FIFA trigram,but not ISO 3166)
3341	TOGS	Thermal Observation Gunnery Sight
3342	TOMS	Total Ozone Mapping Spectrometer (satellite instrument)
3343	TON	Tonga (ISO 3166 trigram)
3344	TOS	Tape Operating System,Terms of service,The Original Series,used to distinguish the first Star Trek TV series from other parts of the media franchise,Tramiel Operating System
3345	TOT	Time On Target
3346	TOW	Tube-launched,Optically tracked,Wire-guided (anti-tank missile)
3347	TP	East Timor (ISO 3166 digram; obsolete 2002),São Tomé and Príncipe (FIPS 10-4 country code),Training Practice,Trident Ploughshares
3348	TPE	Chinese Taipei (IOC and FIFA trigram for the country also known as Taiwan)
3349	TPI	The point is
3350	TPO	Thrombopoietin
3351	TPS	The Pennington School
3352	TPTB	The Powers That Be (often used to refer to the people responsible for the content of TV series or movies)
3353	TQ	Top Qualifier (similar to Pole Position in car racing)
3354	TRA	Technology iness Assessment
3355	TRAC	(U.S. Army) TRADOC Analysis Center
3356	TRACON	Terminal Radar Approach Control
3357	TRADOC	(U.S. Army) Training and Doctrine Command
3358	TRANSCOM	U.S. Transportation Command
3359	TRAP	Tactical Receive equipment and related Applications
3360	TRASANA	TRADOC Systems Analysis Agency
3361	TRD	Towed Radar Decoy
3362	TRIGAT	Third Generation Antitank (missile)
3363	TRL	Technology readiness level
3364	Trp	Troop
3365	TRU	Transuranic
3366	TRUEX	Training in Urban Environment Exercise
3367	TRW	Thompson Ramo Wooldridge Inc.
3368	Ts	Terasecond
3369	TS	Terasiemens,Thunderstorm (METAR code),Tunisia (FIPS 10-4 country code),TinySex,Transsexual, Tough Sh*t
3370	TSA	Theatre Storage Area,Time Slot Allocation,Transportation Security Administration,The Salvation Army
3371	TSEC	Transmission Security Encryption Code
3372	TSL	Transportation Security Laboratory
3373	TSN	The Sporting News (historic name of the periodical now known as Sporting News),The Sports Network
3374	TSO	The Stationery Office (was HMSO until 1996),(U.S.) TRICARE Support Office,Trans-Siberian Orchestra (band)
3375	TSOP	Tactical Standing Operation Procedure,The Sound of Philadelphia (classic 1970s R&B instrumental)
3376	TSR	Terminate and Stay Resident
3377	TSSIA	The Subject Says It All
3378	TT	Teratesla,Terrestrial Time,Tourist Trophy (Motorcycle sport),Trinidad and Tobago (ISO 3166 digram)
3379	TTCT	Torrance Tests of Creative Thinking
3380	TTFN	Ta Ta For Now
3381	TTL	Tax,Title,License,Through-the-lens (photography),Time 'till live,Time to live,Transistor-transistor logic
3382	TTO	Trinidad and Tobago (ISO 3166 trigram)
3383	TTP	Tactics,Techniques,and Procedures,Thrombotic thrombocytopenic purpura,Trailer Transfer Point
3384	TTTEAF	Thomas the Tank Engine and Friends
3385	TTY	TeleTYpewriter (Printer)
3386	TTYL	To You Later (Internet slang)
3387	TTZ	Tetrazolium
3388	TU	Technische Universität (German for 'Technical University'),Thammasat University (Thailand),Turkey (FIPS 10-4 country code)
3389	TUC	Trades Union Congress
3390	TUG	TeX Users Group
3391	TUI	Text-based user interface (cf. CLI),among other uses
3392	TUN	Tunisia (ISO 3166 trigram)
3393	TUNS	Technical University of Nova Scotia
3394	TUR	Turkey (ISO 3166 trigram)
3395	TUSK	Tank Urban Survival Kit
3396	TUV	Tuvalu (ISO 3166 trigram)
3397	TV	Television,Teravolt,Transvestite,Tuvalu (ISO 3166 and FIPS 10-4 country code digram)
3398	Tv	Time value,a designation seen on some camera dials for shutter priority mode
3399	TVA	Tennessee Valley Authority
3400	TVG	Television Games (Network),Tick,Very Good,Often used by School Teachers when marking homework etc. (Tick VG)[1][2]
3401	TVR	TreVor (Wilkinson) Racing
3402	TVS	Tornado vortex signature
3403	TW	Republic of China (Taiwan) (ISO 3166 and FIPS 10-4 country code digram),Terawatt
3404	TWAIN	Technology Without An Interesting Name
3405	TWE	Trans World Entertainment
3406	TWI	The Welding Institute
3407	TWIP	Take What Insurance Pays,When a surgeon agrees to accept a lower payment than he ordinarily would for a procedure and not charge the patient the difference
3408	TWN	Republic of China (Taiwan) (ISO 3166 trigram)
3409	TWP	Technical Working Paper
3410	TWS	Thermal Weapon Sight,Track While Scan
3411	TX	Texas (postal symbol),Transmit,Turkmenistan (FIPS 10-4 country code)
3412	TXV	Thermostatic Expansion Valve
3413	TYT	Take Your Time,Internet chat abbreviation
3414	TZ	Tanzania (ISO 3166 and FIPS 10-4 country code digram)
3415	TZA	Tanzania (ISO 3166 trigram)
3416	TZC	Tetrazolium chloride
3417	U	Uranium
3418	UA	Ukraine (ISO 3166 digram) Unit of Action
3419	UAAP	University Athletic Association of the Philippines
3420	UAB	University of Alabama at Birmingham
3421	UAV	Unmanned Aerial Vehicle,Unprotected Anal and Vaginal sex,UB[edit]
3422	UBC	United Baptist Church,University of British Columbia
3423	UBIGEO	Ubicación Geografica (Spanish for Geographical Location)
3424	UBS	Unbundled Bitstream Services,United Bank of Switzerland,United Banque Suisse
3425	UCBSA	United Cricket Board of South Africa
3426	UCF	University of Central Florida
3427	UCLA	University of California at Los Angeles
3428	UCLES	University of Cambridge Local Examinations Syndicate
3429	UCR	University of California at Riverside
3430	UCR	University of Costa Rica
3431	UCS	Union of Concerned Scientists
3432	UCSB	University of California at Santa Barbara
3433	UCSD	University of California at San Diego
3434	UDAS	Uppsala-DLR Asteroid Survey
3435	UDDI	Universal Description,Discovery and Integration
3436	UDTS	Uppsala-DLR Trojan Survey
3437	UE	Unit of Employment
3438	UEFA	Union of European Football Associations
3439	UESAC	Uppsala-ESO Survey of Asteroids and Comets
3440	UFC	Ultimate Fighting Championship
3441	UFO	Unidentified Flying Object, or: United Farmers of Ontario
3442	UG	Uganda (ISO 3166 and FIPS 10-4 country code digram)
3443	UGA	Uganda (ISO 3166 trigram)
3444	UGV	Unmanned Ground Vehicle
3445	UHF	Ultra High Frequency
3446	UHMW	Ultra-High Molecular Weight
3447	UHRB	Ultra-High Resolution Building (simulation)
3448	UIC	University of Illinois at Chicago
3449	UID	User ID
3450	UIUC	University of Illinois at Urbana-Champaign
3451	UJTL	Universal Joint Task List
3452	UKIP	United Kingdom Independence Party
3453	UKR	Ukraine (ISO 3166 trigram)
3454	UL	Underwriters Laboratories
3455	ULF	Ultra Low Frequency
3456	UM	U.S. Minor Outlying Islands (postal symbol; ISO 3166 digram)
3457	UMCP	Unit Maintenance Collection Point
3458	UMES	University of Maryland Eastern Shore
3459	UMI	U.S. Minor Outlying Islands (ISO 3166 trigram)
3460	UMIST	University of Manchester Institute of Science and Technology
3461	UMTS	Universal Mobile Telecommunications System
3462	UN	United Nations
3463	UNABOM	University and airline bomber (FBI case name)
3464	UNAIDS	(i/a) Joint United Nations Programme on HIV/AIDS
3465	UNAMSIL	United Nations Mission in Sierra Leone
3466	UNCF	United Negro College Fund
3467	UNCLOS	United Nations Convention on the Law of the Sea
3468	UNCSGN	United Nations Conference on the Standardization of Geographical Names
3469	UNCTAD	United Nations Conference on Trade and Development
3470	UNDCP	United Nations Drug Control Programme
3471	UNDE	(i/a) Union of National Defence Employees (Canada)
3472	UNDP	United Nations Development Programme
3473	UNEP	United Nations Environment Programme
3474	UNFCCC	United Nations Framework Convention on Climate Change
3475	UNFICYP	United Nations Peacekeeping Force in Cyprus
3476	UNGEGN	United Nations Group of Experts on Geographical Names
3477	UNHCR	United Nations High Commission (er) for Refugees
3478	UNICEF	United Nations Children's Fund (originally the United Nations International Children's Emergency Fund)
3479	UNICRI	United Nations Interregional Crime and Justice Research Institute
3480	UNIDO	United Nations Industrial Development Organization
3481	UNIFEM	United Nations Development Fund for Women (from the French Fonds de développement des Nations unies pour la femme)
3482	UNMIK	United Nations Interim Administration Mission in Kosovo
3483	UNOSOM	United Nations Operations in Somalia
3484	UNPROFOR	United Nations Protection Force (in former Yugoslavia)
3485	UNRISD	United Nations Research Institute for Social Development
3486	UNSM	Union of Nova Scotian Municipalities
3487	UNTAC	United Nations Transitional Authority in Cambodia
3488	UNTAET	(i/a) United Nations Transitional Administration in East Timor
3489	UNU	United Nations University
3490	UPdM	Università Popolare della Multimedialità
3491	UPI	United Press International
3492	UPN	United Paramount Network
3493	UPU	Universal Postal Union
3494	URBSFA	Union royale belge des sociétés de football association (French for Royal Belgian Football Association)
3495	URD	User Requirements Document
3496	URY	Uruguay (ISO 3166 trigram)
3497	US	United States (also ISO 3166 and FIPS 10-4 country code digram)
3498	USAF	United States Air Force
3499	USAFSPC	U.S. Air Force Space Command
3500	USAID	United States Agency for International Development
3501	USAPATRIOT	Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism
3502	USAREUR	United States Army Europe
3503	USB	Universal Serial Bus
3504	USCG	United States Coast Guard
3505	USDA	United States Department of Agriculture
3506	USDI	United States Department of the Interior
3507	USDOE	United States Department of Energy
3508	USDRE	(U.S.) Under-Secretary of Defense for Research and Engineering (1978-1986)
3509	USEC	United States Enrichment Corporation
3510	USFL	United States Football League
3511	USFWS	United States Fish and Wildlife Service
3512	USGS	United States Geological Survey
3513	USIA	United States Information Agency
3514	USJFCOM	United States Joint Forces Command
3515	USMC	United States Marine Corps
3516	USMNT	United States men's national (soccer) team
3517	USN	United States Navy
3518	USNB	United States Naval Base
3519	USNG	United States National Grid
3520	USNH	United States Naval Hospital
3521	USNI	United States Naval Institute
3522	USNO	U.S. Naval Observatory
3523	USNOFS	United States Naval Observatory Flagstaff Station
3524	USNP	United States Newspaper Program
3525	USNR	United States Navy Reserve
3526	USNS	United States Naval Ship
3527	USNZ	University Sport New Zealand
3528	USPS	United States Postal Service
3529	USPTO	United States Patent and Trademark Office
3530	USS	United States ship (sometimes meaningless; see Star Trek)
3531	USSPACECOM	United States Space Command
3532	USSR	Union of Soviet Socialist Republics
3533	UST	Underground Storage Tank
3534	USTRANSCOM	United States Transportation Command
3535	USWNT	United States women's national (soccer) team
3536	UT	Universal Time
3537	UTEP	University of Texas at El Paso (pronounced you-tep)
3538	UTM	Universal Transverse Mercator (geographical co-ordinate system)
3539	UUA	Unitarian Universalist Association
3540	UUID	Universally Unique Identifier (see also GUID)
3541	UUV	Unmanned Underwater Vehicle
3542	UW	University of Washington
3543	UWO	University of Western Ontario
3544	UWT	Under Water Telephone
3545	UWTG	Under Water Tug
3546	UWW	United World Wrestling
3547	UXO	Unexploded Ordnance
3548	UY	Uruguay (ISO 3166 and FIPS 10-4 country code digram)
3549	UZ	Uzbekistan (ISO 3166 and FIPS 10-4 country code digram)
3550	UZB	Uzbekistan (ISO 3166 trigram)
3551	VACIS	Vehicle And Container Inspection System
3552	VACIS	Victorian Ambulance Clinical Information System
3553	VANOS	Variable Nockenwelle System
3554	VAO	Vienna Art Orchestra
3555	VBA	Visual Basic for Applications
3556	vCJD	Variant Creutzfeldt-Jakob Disease
3557	VCNO	(U.S.) Vice Chief of Naval Operations
3558	VCofS	Vice Chief of Staff
3559	VCR	Video cassette recorder
3560	VCT	Saint Vincent and the Grenadines (ISO 3166 trigram)
3561	VDFS	VisualSVN Distributed File System (VDFS)
3562	VE	Venezuela (FIPS 10-4 country code; ISO 3166 digram)
3563	VEEGA	Venus Earth Earth Gravity Assist manœuvre
3564	VEN	Venezuela (ISO 3166 trigram)
3565	VERITAS	Very Energetic Radiation Imaging Telescope Array System
3566	VfD	s for deletion (used in Wikipedia)
3567	VFM	Value For Money
3568	VFMO	Very Fast Moving Object (astronomy)
3569	VFT	Virtual Function Table
3570	VFW	Veterans of Foreign Wars
3571	VG	British Virgin Islands (ISO 3166 digram)
3572	VGB	British Virgin Islands (ISO 3166 trigram)
3573	VH1	Video Hits One
3574	VHF	Very High Frequency
3575	VIA	Versatile Interface Adapter
3576	VIDS	Visual Information Display System
3577	VII	7 (in Roman numerals)
3578	VIII	8 (in Roman numerals)
3579	VIN	(i/a) Vehicle Identification Number (ISO 3779)
3580	VIP	Very Important Person
3581	VISCII	VIetnamese Standard Code for Information Interchange
3582	VIT	Vellore Institute of Technology
3583	VIVO	Video In Video Out
3584	VJ	Video Jockey
3585	VLAD	Vertical Line Array DIFAR
3586	VLBA	Very Long Baseline Array
3587	VLF	Very Low Frequency
3588	VLIW	Very Long Instruction Word
3589	VLPFC	VentroLateral PreFrontal Cortex
3590	VLPMC	VentroLateral PreMotor Cortex
3591	VLSI	Very-large-scale integration
3592	VM	Vietnam (FIPS 10-4 country code)
3593	VMF	Marine Fighting Squadron of the United States Marine Corps
3594	VMF	Variable Message Format
3595	VMN	VentroMedial Nucleus (neurophysiology)
3596	VN	Vietnam (ISO 3166 digram)
3597	VNIR	Visible and Near InfraRed
3598	VNM	Vietnam (ISO 3166 trigram)
3599	VNS	see entry
3600	VOA	Voice of America
3601	VOIP	Voice Over Internet Protocol
3602	VOLT	Visual OpenType Layout Tool
3603	VON	Victorian Order of Nurses
3604	VOR	Voice of Russia
3605	VOX	Voice Operated oscillator
3606	VPOTUS	Vice President of the United States
3607	VPN	Virtual Private Network
3608	VR	Virtual Reality
3609	VRSG	Virtual Reality Scene Generator
3610	VSHORAD	Very Short Range Air Defence
3611	VSO	Voluntary Services Overseas
3612	VSR	Very Special Relativity
3613	VTC	Video Tele-Conference
3614	VTEC	Variable valve Timing and Electronic lift Control
3615	VTOL	Vertical Take-Off & Landing
3616	VUB	Vrije Universiteit Brussel (Belgian university)
3617	VUT	Vanuatu (ISO 3166 trigram)
3618	VVAF	Vietnam Veterans of America Foundation
3619	VW	Volkswagen
3620	VZ	Verizon Communications (NYSE code)
3621	W3C	World Wide Web Consortium
3622	WAAC	Women's Army Auxiliary Corps (Britain) (World War I UK)
3623	WAAF	Women's Auxiliary Air Force (World War II UK)
3624	WACC	Weighted Average Cost of Capital (accounting)
3625	WACS	What-A-Cartoon! Show
3626	WAD	Weapons Alert Designator
3627	WAGGGS	World Association of Girl Guides and Girl Scouts
3628	WAL	see entry
3629	WAN	Wide area network
3630	WAP	Wireless Application Protocol
3631	WAPIMA	What a pain in my ass
3632	WAR	With All Respect
3633	WAsP	Short form of WAAAAP (Wind Atlas Analysis and Application Program)
3634	WAYP	White And Yellow Pages
3635	Wb	Weber
3636	WBC	World Boxing Council
3637	WBE	Work Breakdown Element
3638	WBO	World Boxing Organization
3639	WCBO	World Chess Boxing Organisation
3640	WCBP	World Center for Birds of Prey
3641	WCL	World Confederation of Labour
3642	WCW	World Championship Wrestling
3643	WDIN	Wildlife Disease Information Node
3644	WDWR	Walt Disney World Resort
3645	WEBS	Weapon Effectiveness Battle Simulation
3646	WEC	World Extreme Cagefighting
3647	WEEE	Waste Electrical and Electronic Equipment
3648	WEF	World Economic Forum
3649	WEM	West Edmonton Mall
3650	WEU	Western European Union
3651	WEZ	Weapon Engagement Zone
3652	WF	Wallis and Futuna Islands (ISO 3166 digram)
3653	WFC	Women's Forage Corps (World War II UK)
3654	WFD	Weapon of Focused Destruction
3655	WFF	Wallops Flight Facility
3656	WFI	Water for Injection
3657	WFH	Working from home
3658	WFP	World Food Program
3659	WFZ	Weapons Free Zone
3660	WH	Wehrmacht Heer (German World War II army vehicle licence plate code)
3661	WHAM	Wisconsin Hydrogen-Alpha Mapping (telescope)
3662	WHI	Women's Health Initiative
3663	WHIP	Walks plus hits per inning pitched
3664	WHO	World Health Organisation
3665	WHS	(U.S.) Washington Headquarters Services
3666	WIIFM	What's in it for me?
3667	WIP	Work In Progress
3668	WIPO	World Intellectual Property Organization
3669	WIPP	[Nuclear] Waste Isolation Pilot Plant
3670	WIYN	Wisconsin Indiana Yale NOAO telescope consortium
3671	WKYP	Will Keep You Posted
3672	WL	Wehrmacht Luftwaffe (German World War II air force vehicle licence plate code)
3673	WLB	Women's Land Brigade (World War II Canada)
3674	WLF	Wallis and Futuna Islands (ISO 3166 trigram)
3675	WLOG	Without Loss Of Generality (see WOLOG)
3676	WM	Wehrmacht Marine (German World War II navy vehicle licence plate code)
3677	WMANUS	West Midlands Area National Union of Students
3678	WMD	World Movement for Democracy
3679	WMI	Wildlife Management Institute
3680	WMO	World Meteorological Organization
3681	WNA	World Nuclear Association
3682	WNF	Will Not Fix
3683	WNIT	Women's National Invitation Tournament
3684	WNW	West North-West
3685	WO	Warrant Officer
3686	WOF	Width of Fabric
3687	WOFT	Waste Of Fucking Time
3688	WOFTAM	Waste Of Fucking Time And Money
3689	WOI	Wheels Of Italy
3690	WOM	Write Only Memory
3691	WOS	Wilson Ornithological Society
3692	WOT	Waste Of Time
3693	WP	White Phosphorus (ammunition)
3694	WPB	War Production Board during World War II
3695	WPE	World Pork Expo
3696	WPK	Wider Peacekeeping
3697	WR	Wide Receiver (football)
3698	WRAC	Women's Royal Army Corps (World War II UK)
3699	WRAIR	Walter Reed Army Institute of Research
3700	WRBWWRM	We Best What We Most
3701	WRC	World Rally Championship
3702	WRC	World Religions Conference
3703	WRNG	Warning
3704	WRS	Worldwide Reference System
3705	WRT	NHS Workforce Review Team
3706	WRT	The Linksys routers whose model name start with 'WRT'
3707	WRT	Third party firmware for the Linksys WRT routers and compatible models from other vendors.
3708	WRT	Web Runtime (WRT) is a portable application framework developed by Nokia that allows the creation of widgets on the S60 Platform.
3709	WRT	Wireless Receiver/Transmitter ( computer networks/IT )
3710	WRT	Wireless Ronin Technologies (digital signage)
3711	WRT	World Rally Team
3712	WRT	Writer Response Theory
3713	WSC	Weapon System Catalogue
3714	WSDL	Web Services Description Language
3715	WSJ	(The) Wall Street Journal
3716	WSROC	Western Sydney Regional Organisation of Councils
3717	WSSM	Winchester Super Short Magnum (family of rifle cartridges)
3718	WSTC	Women Signallers Territorial Corps (World War II UK)
3719	WSW	West South-West
3720	WTC	World Trade Center
3721	WTF	What the fuck?; also What a Terrible Failure (android)
3722	WTFH	What The Fucking Hell
3723	WTH	What the Hell
3724	WTO	World Trade Organization
3725	WUBU2	What you been up to
3726	WV	West Virginia (postal symbol)
3727	WVA	World Veterinary Association
3728	WVIAC	West Virginia Intercollegiate Athletic Conference
3729	WVR	Women's Volunteer Reserve (World War II UK)
3730	WVSC	Women's Volunteer Service Corps (World War II Canada)
3731	WVU	West Virginia University
3732	WW	see entry
3733	WWE	World Wrestling Entertainment
3734	WWI	World War I
3735	WWII	World War II
3736	WWIII	World War III
3737	WWJD	What would Jesus do?
3738	WWS	Wheaton Warrenville South High School
3739	WWWF	World Wide Wrestling Federation
3740	WXO	Weather [Executive] Officer
3741	WY	Wyoming (postal symbol)
3742	WZ	Swaziland (FIPS 10-4 country code)
3743	XBML	eXtended Business Modelling Language
3744	XC	Ninety (in Roman numerals)
3745	XCBL	XML Common Business Library
3746	XD	Used in chatrooms or email for smiley face. X is the eyes; squinted D is the mouth; XD.
3747	Xe	Xenon
3748	XFA	XML Forms Architecture
3749	XFC	Xtreme Fighting Championships
3750	XFD	Fighter aircraft made by Douglas
3751	Xfe	X File Explorer
3752	XFF	X-Forwarded-For
3753	XFG	Exfoliation glaucoma
3754	XFR	Automobile made by Jaguar
3755	XFT	X FreeType interface library
3756	XG	Automobile made by Hyundai
3757	XGA	Extended Graphics Array
3758	XGP	Extreme Game Player
3759	XHTML	eXtensible Hypertext Markup Language
3760	XI	Eleven (in Roman numerals)
3761	XII	Twelve (in Roman numerals)
3762	XIII	Thirteen (in Roman numerals)
3763	XIV	Fourteen (in Roman numerals)
3764	XIX	Nineteen (in Roman numerals)
3765	XJS	Automobile made by Jaguar
3766	XKB	X keyboard extension
3767	XKE	Automobile made by Jaguar
3768	XKR	Automobile made by Jaguar
3769	XML	eXtensible Markup Language
3770	XMSF	eXtensible Modelling and Simulation Framework
3771	XNA	X-No-Archive,Xeno Nucleic Acid
3772	XNC	X Northern Captain
3773	XNU	X is Not Unix
3774	XP	eXperience Point (role-playing games)
3775	XQJ	XQuery API for Java™
3776	XRAY	X-Ray
3777	XRML	eXtensible Rights Markup Language
3778	XS	Xiaolin Showdown
3779	XSL	eXtensible Style Language
3780	XTMH	eXtreme Technology Multiprocessor Hyperlanguage
3781	XUL	XML User Interface Language
3782	XV	Fifteen (in Roman numerals)
3783	XVI	Sixteen (in Roman numerals)
3784	XVII	Seventeen (in Roman numerals)
3785	XVIII	Eighteen (in Roman numerals)
3786	XWF	Xcitement Wrestling Federation
3787	XX	Twenty (in Roman numerals)
3788	Xyl	Xylobium
3789	XZN	Triple square screw driver
3790	y	Yocto-
3791	Y2K	Year Two Thousand
3792	yA	Yoctoampere
3793	Ya	Yottayear
3794	YaBPr	Yet another Brother Pat rant
3795	YABSLAG	Yet another boy singing like a girl
3796	YAC	Youth-Adult Committee
3797	YAFLA	Yet Another Five Letter Abbreviation
3798	YAP	Young Aspiring Professional
3799	YB	Youcef Benzouada (Southern Algerian name)
3800	Yb	Ytterbium
3801	yC	Yoctocoulomb
3802	YC	Yottacoulomb
3803	YDS	Yosemite Decimal System (climbing)
3804	YE	Yemen (ISO 3166 digram)
3805	YEM	Yemen (ISO 3166 trigram)
3806	yF	Yoctofarad
3807	YF	Yottafarad
3808	yg	Yoctogram
3809	Yg	Yottagram
3810	YGCO	Yamaneko Group of Comet Observers
3811	Ygo	Yu-Gi-Oh!
3812	yH	Yoctohenry
3813	YH	Yottahenry
3814	YHBT	You Have Been Trolled
3815	YHII	You Have It Inside
3816	YHS	Ya Hoor sur!
3817	Yi	Yobi
3818	Yippie	Youth International Party + suffix
3819	yJ	Yoctojoule
3820	YJ	Yottajoule
3821	yK	Yoctokelvin
3822	YK	Yottakelvin
3823	YKYFCW	You know you're from Christchurch when (post-earthquake joke)
3824	yL	Yoctolitre
3825	YL	Yottalitre
3826	ym	Yoctometre
3827	Ym	Yottametre
3828	YMMD	You Make My Day
3829	yN	Yoctonewton
3830	YN	Yottanewton
3831	YOLO	You Only Live Once
3832	YPA	Yards per Pass Attempt (football statistic)
3833	YPIO	Your Problem Is Obvious
3834	YPO	Young Presidents' Organization
3835	ys	Yoctosecond
3836	yS	Yoctosiemens
3837	Ys	Yottasecond
3838	YS	Yottasiemens
3839	YSI	Young Scots for Independence
3840	yT	Yoctotesla
3841	YTD	Year-To-Date
3842	YTM	Yield to Maturity
3843	YTS	Youth Training Scheme
3844	YTT	Yoshi Topsy-Turvy
3845	Yuppie	Young Urban Professional + suffix
3846	yV	Yoctovolt
3847	YV	Yottavolt
3848	yW	Yoctowatt
3849	YW	Yottawatt
3850	YYH	YuYu Hakusho
3851	z	Zepto
3852	Z	Zetta
3853	zA	Zeptoampere
3854	ZAF	South Africa (ISO 3166 trigram)
3855	ZAMS	Zero age main sequence
3856	ZAS	Zylinder Abschaltung System
3857	ZBT	Zero-Balance Transfer (accounting)
3858	zC	Zeptocoulomb
3859	ZC	Zettacoulomb
3860	ZCM	(n) ZENworks Configuration Management
3861	ZCMK	Zone Control Master Key
3862	ZCU	Zimbabwe Cricket Union
3863	\a	Atto-