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	CAVOK	Ceiling And Visibility OK ('Kav-okay')
599	CAW	Canadian Auto Workers (trade union)
600	CB	Citizens' Band radio,Cambodia (FIPS 10-4 country code)
601	CBASSE	Commission on Behavioral And Social Sciences and Education ('sea bass')
602	CBC	Canadian Broadcasting Corporation,Christmas Bird Count,Cipher-Block Chaining,Cornering Brake Control
603	CBE	Commander of the Order of the British Empire,Cab Beside Engine (see truck)
604	CBF	Confederação Brasileira de Futebol (Portuguese,'Brazilian Football Confederation')
605	CBGB	Country,Blue Grass,and Blues (former New York City nightclub)
606	CBLA	Comparative bullet lead analysis
607	CBM	Canadian Baptist Ministries
608	CBM	Commodore Business Machines
609	CBML	Coalition Battle Management Language
610	CBN	CardsApp Brand Number
611	CBOL	Consortium for the Barcode of Life
612	CBOT	Chicago Board of Trade
613	CBR	Case-Based Reasoning
614	CBRN	Chemical,Biological,Radiological,or Nuclear (weapon or event)
615	CBRNE	Chemical,Biological,Radiological,Nuclear or [high-yield] Explosive (weapon or event)
616	CBS	Columbia Broadcasting System,Corps Battle Simulation
617	CBUS	Columbus,Ohio
618	CC	carbon copy
619	CCA	Counter Command Activity
620	CCC	Canterbury Clothing Company,Civilian Conservation Corps (U.S.,1930s and 1940s),Corpus Christi College,Oxford
621	CCCP	Central Committee of the Communist Party,Cyrillic for SSSR (Soyuz Sovetskikh Sotsialisticheskikh Respublik,Russian Союз Советских Социалистических Республик,Union of Soviet Socialist Republics)
622	CCD	Charge-Coupled Device,Confraternity of Christian Doctrine (Catechism)
623	CCF	Cartoon Cartoon Fridays
624	CCG	Canadian Coast Guard,Collectible Card Game
625	CCGC	Canadian Coast Guard Cutter,Canadian Coast Guard College
626	CCGH	Canadian Coast Guard Hovercraft
627	CCGS	Canadian Coast Guard Ship,Christ Church Grammar School
628	CCH	Computer-Controlled Hostile
629	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)
630	CCII	Command and Control Information Infrastructure,Community Capital Investment Initiative
631	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
632	CCIT	Comité consultatif international télégraphique (French for International Telegraph Consultative Committee,merged with the CCIF in 1956 to form the CCITT)
633	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)
634	CCK	Cholecystokinin,Cocos (Keeling) Islands (ISO 3166 trigram)
635	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
636	CCOC	Canadian Children's Opera Chorus,Crosley Car Owners Club
637	CCOP	Coalition Common Operating/Operational Picture
638	CCP	Casualty Collection Point,Communications Checkpoint,Contingency Communications Package
639	CCPA	Consumer Credit Protection Act
640	CCR	Creedence Clearwater Revival
641	CCRAp	Canadian Conservative Reform Alliance party
642	CCRP	Command and Control Research Program
643	CCRTS	Command and Control Research and Technology Symposium
644	CCSCS	Consultative Committee for Space Data Systems
645	CCSCS	Coordinadora de Centrales Sindicales del Cono Sur
646	CCSK	Cyclic Code Shift Keying
647	CCT	Current Commitments Team
648	Cd	Cadmium
649	cd	Candela
650	CD	Compact Disc
651	CD1	Cluster of Differentiation 1 (a small gene family)
652	CDA	UK Centre for Defence Analysis
653	CDD	Capabilities Development Document
654	CDE	Chemical Defence Equipment
655	CDipAF	Certified Diploma in Accounting and Finance
656	CDL	Commercial driver's license
657	CDM	Clean Development Mechanism (Kyoto protocol), Cold Dark Matter (astronomy)
658	CDMA	Code Division Multiple Access
659	CDMSII	Cryogenic Dark Matter Search II
660	Cdr	Commander
661	CDT	Central Daylight Time (UTC−5 hours)
662	Cdt	Commandant
663	Ce	Cerium
664	CE	Christian/Common Era
665	CEA	Campaign Effectiveness Analysis
666	CECOM	U.S. Army Communications and Electronics Command
667	CEI	Competitive Enterprise Institute
668	CENTCOM	United States Central Command
669	CENTO	Central Treaty Organization (Baghdad Pact)
670	CEO	Chief Executive Officer
671	CEP	Circular Error Probable
672	CERCLA	U.S. Comprehensive Environmental Response,Compensation,and Liability Act (Superfund)
673	CERDEC	U.S. Communications-Electronics Research,Development and Engineering Center
674	CERT	Computer Emergency Response Team
675	CESS	Centre for Earth Science Studies (India)
676	CEST	Central European Summer Time
677	CET	Central European Time
678	CEWC	Council for Education in World Citizenship
679	Cf	Californium
680	CF	Canadian Forces,Central African Republic (ISO 3166 digram),Republic of the Congo (FIPS 10-4 country code)
681	CFA	Cat Fanciers' Association,Chartered Financial Analyst,Colour Filtering Array,County Fire Authority,Covering Force Area
682	CFAR	Christine's,Federal Acquisition Regulation
683	CFC	ChloroFluoroCarbon,Canadian Fish Company
684	CFES	Continuous Flow Electrophoresis System
685	CFFZ	Call For Fire Zone
686	CFG	Context-free grammar,Control flow graph
687	CFHT	Canada-France-Hawaii Telescope
688	CFI	Center for Inquiry (CSICOP)
689	CFL	Canadian Football League,Co-ordinated Fire Line
690	CFLCC	Coalition Forces Land Component Command
691	CFM	Certified Facilities Manager
692	CFO	Chief Financial Officer
693	CFP	Call for papers, College Football Playoff, Common Fisheries Policy (EU)
694	CFRP	Carbon fibre reinforced plastic
695	CFS	Chronic Fatigue Syndrome
696	CFSP	Common Foreign and Security Policy
697	CFU	Colony Forming Unit in Microbiology
698	CFV	Cavalry Fighting Vehicle
699	CFZ	Critical Friendly Zone
700	CG	Client Group,Computer Graphics,Controls Group,Democratic Republic of the Congo (FIPS 10-4 country code),Republic of the Congo (ISO 3166 digram)
701	CGH	Comparative Genomic Hybridisation
702	CGIG	Cross-Government Implementation Group
703	CGO	Republic of the Congo (IOC and FIFA trigram,but not ISO 3166)
704	CGS	Chief of the General Staff
705	CGT	Capital Gains Tax
706	ch	ch(L) is used to denote the Chern character of a line bundle
707	CH	Chieftain tank,China (FIPS 10-4 country code),Switzerland (ISO 3166 digram; from Latin Confoederatio Helvetica)
708	CHAMPUS	(U.S.) Civilian Health and Medical Program of the Uniformed Services (now known as TRICARE)
709	CHAOS	Cambridge Heart Anti-Oxidant Study
710	CHAPS	Clearing House Automated Payment System
711	CHDK	Canon Hack Development Kit (Canon camera firmware hack)
712	CHE	Switzerland (ISO 3166 trigram; from Latin Confoederatio Helvetica)
713	CHI	Columbia Helicopters,Inc
714	CHiP	California Highway Patrol
715	CHIPS	Cosmic Hot Interstellar Plasma Spectrometer
716	CHL	Chile (ISO 3166 trigram)
717	CHLA	Core Historical Literature of Agriculture
718	CHN	China (ISO 3166 trigram)
719	CHOGM	Commonwealth Heads of Government Meeting
720	CHPSO	California Hospital Patient Safety Organization
721	CHRS	Canadian Heart Rhythm Society
722	CHT	Certified Hand Therapist
723	CI	Chile (FIPS 10-4 country code),Côte d'Ivoire (ISO 3166 digram),Counter-Intelligence,101 (in Roman numerals)
724	Ci	Curie
725	CIA	Cairo International Airport,Central Intelligence Agency,Culinary Institute of America
726	CIAO	Critical Infrastructure Assurance Office,Component-Integrated ACE ORB
727	CIB	Complete In Box (Internet auction/trading listings)
728	CIBC	Canadian Imperial Bank of Commerce
729	CID	Certified Interior Designer
730	CIEF	Comité international d'enregistrement des fréquences (International Frequency Registration Board)
731	CINC	Commander in Chief
732	CINEOS	Campo Imperatore Near-Earth Object Survey
733	CIPE	(European) Centre for International Political Economy
734	CIR	(Commander's) Critical Information Requirements
735	CIR	Corotating Interaction Region
736	CIS	Canadian Interuniversity Sport,Commonwealth of Independent States,Command and Information System,Communication and Information System
737	CISA	(U.S.) C4I Integration Support Activity
738	CISB	Complete In Sealed Box (Internet auction/trading listings)
739	CISPR	Comité international spécial des perturbations radioélectriques (Special International Committee on Radio Interference)
740	CISSP	Certified Information Systems Security Professional
741	CIV	Côte d'Ivoire (ISO 3166 trigram)
742	CIVPOP	Civilian Population
743	CIWS	Close-In Weapon System
744	CJ	Cayman Islands (FIPS 10-4 country code),Criminal Justice
745	CJC	Canadian Jewish Congress,Cold Junction Compensation
746	CJCS	Chairman of the Joint Chiefs of Staff
747	CJD	Chronological Julian Day,Creutzfeldt-Jakob Disease
748	CJO	Chief of Joint Operations
749	CJTF	Combined Joint Task Force
750	CK	Cocos (Keeling) Islands (FIPS 10-4 country code),Cook Islands (ISO 3166 digram)
751	CKA	commonly known as, Canada Kicks Ass
752	CKND	Codename: Kids Next Door
753	CL	Chile (ISO 3166 digram),Co-ordination Line,One Hundred and Fifty (in Roman numerals)
754	Cl	Chlorine
755	CLA	Clutterers Anonymous
756	CLEC	Competitive Local Exchange Carrier
757	CLEMARS	California Law Enforcement Mutual Aid Radio System
758	CLIC	Compact LInear Collider
759	CLO	Cornell Lab of Ornithology
760	CLOS	Command to Line-Of-Sight (missile control system)
761	CLPFC	CentroLateral PreFrontal Cortex
762	CLRP	College Loan Repayment Program
763	CM	Cameroon (FIPS 10-4 country code; ISO 3166 digram),Cruise Missile,Nine Hundred (in Roman numerals)
764	Cm	Curium
765	CMA	U.S. Chemical Materials Agency,Country Music Association (also used to refer to the organization's annual awards),Crystal Meth Anonymous
766	CMHC	Canada Mortgage and Housing Corporation
767	CMIIAW	Correct me if I am wrong
768	CMIS	Common management information service
769	CMJ	Christopher Martin-Jenkins (BBC sports commentator)
770	CMM	Capability Maturity Model
771	CMMC	Corps Materiel Management Centre
772	CMML	Chronic MyeloMonocytic Leukemia,Continuous Media Markup Language
773	CMOS	Canadian Meteorological and Oceanographic Society,(The) Chicago Manual of Style,Complementary Metal Oxide Semiconductor
774	CMP	Common [Operating/Operational] Maritime Picture
775	CMPD	Charlotte Mecklenburg Police Department
776	CMPD	Chronic Myeloproliferative Disease
777	CMR	Cameroon (ISO 3166 trigram),Coaxial Main Rotors (helicopter type)
778	CMS	Centers for Medicare and Medicaid Services,The Chicago Manual of Style
779	CMT	Country Music Television
780	CMU	Carnegie Mellon University,Central Michigan University,Concrete Masonry Unit
781	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)
782	CMYK	Cyan Magenta Yellow Key/blacK (colour model)
783	CN	Canadian National (railway; also the AAR reporting mark for said company),China (ISO 3166 digram),Comoros (FIPS 10-4 country code)
784	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
785	CNBC	Consumer News and Business Channel
786	CND	Campaign for Nuclear Disarmament,Computer Network Defence
787	CNE	Canadian National Exhibition,Computer Network Exploitation,Certified Network Engineer
788	CNF	Cost and Freight
789	CNI	Clinical Nursing Intern
790	CNI	Communications,Navigation and Identification
791	CNN	Cable News Network,Cellular Nonlinear Network
792	CNV	Copy-Number Variable (genetics)
793	Co	Cobalt
794	COB	Close Of Business [day]
795	COBRA	Consolidated Omnibus Budget Reconciliation Act of 1985
796	COD	Cash On Delivery,Democratic Republic of the Congo (ISO 3166 trigram)
797	CoDA	Co-Dependents Anonymous
798	COGENT	Cognitive Objects within a Graphical EnviroNmenT
799	COIL	Chemical Oxygen Iodine Laser
800	COK	Cook Islands (ISO 3166 trigram)
801	COL	Colombia (ISO 3166 trigram)
802	COLA	Cost Of Living Adjustment
803	CONAD	U.S. Continental Air Defense Command
804	CONUS	Continental United States
805	COO	Chief Operating Officer
806	COPE	U.K. Committee On Publication Ethics
807	COPUS	U.K. Committee on the Public Understanding of Science
808	CORD	Common Operational Requirements Document
809	CORE	Consortium for Oceanographic Research and Education
810	COS	Cooper Ornithological Society
811	COSER	COoperative SERvice
812	CoT	Car of Tomorrow (former NASCAR race car design)
813	COTS	Commercial Off The Shelf
814	CP	Canadian Pacific,Check Point,Command Post,Club Penguin
815	CPA	Certified Public Accountant
816	CPCU	Certified Property Casualty Underwriter
817	CPD	Capabilities Production Document
818	CPE	Certificate of Proficiency in English
819	CPE	Certified Professional Ergonomist
820	CPF	Calibration Parameter File,Canadian Patrol Frigate
821	CPG	Clinical Practice Guideline
822	CPIM	Certification on Production and Inventory Management
823	CPIR	Computationally-Private Information Retrieval
824	CPON	Certified Pediatric Oncology Nurse
825	CPPCC	Chinese People's Political Consultative Conference
826	CPR	Canadian Pacific Railway
827	CPR	Cardiopulmonary resuscitation
828	CPSM	Continuous Phase Shift Modulation
829	CPSU	Communist Party of the Soviet Union
830	CPT	Contingency Planning Team
831	CPU	Contract Postal Unit
832	CPV	Cape Verde (ISO 3166 trigram)
833	CPX	Command Post eXercise
834	CQ	Carrier Qualification,Central Queensland,Charge of Quarters,Congressional Quarterly,Constellation Airlines (IATA airline designator),Northern Mariana Islands (FIPS 10-4 territory code)
835	Cr	Chromium
836	CR	Coral Sea Islands (FIPS 10-4 territory code),Costa Rica (ISO 3166 digram)
837	CRAM	Combined Radiometric Correction Model
838	CRD	Capstone Requirements Document
839	CREB	Cyclic AMP-response Element Binding (protein)
840	CREEP	Committee for the Re-Election of the President,a pejorative nickname used by opponents
841	CREN	Christian Real Estate Network Real Estate Association
842	CRI	China Radio International,Costa Rica (ISO 3166 trigram)
843	CRIPL	Consolidated Remain-In-Place List
844	CRM	Cardiac Rhythm Management,Customer Relationship Management
845	CRO	Croatia (IOC and FIFA trigram,but not ISO 3166)
846	CRP	Committee for the Re-Election of the President,Control and Reporting Post
847	CRT	Cardiac Resynchronization Therapy,Cathode Ray Tube,Chinese Remainder Theorem
848	CRTC	Canadian Radio-television and Telecommunications Commission
849	Cs	Caesium
850	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
851	CSC	Closed Spacelike Curve (relativity),Compact system camera,Computer Sciences Corporation,Computer Security Centre,CSCC Canadian Society of Clinical Chemists
852	CSERIAC	(U.S. DoD) Crew Systems Ergonomics Information Analysis Center
853	CSG	Corps Support Group
854	CSI	see entry
855	CSICOP	Committee for the Scientific Investigation of Claims of the Paranormal (became the Committee for Skeptical Inquiry in 2006)
856	CSIP	Commercial Stable Image Platform (AMD)
857	CSK	Czechoslovakia (ISO 3166 trigram; obsolete since 1993)
858	CSL	U.K. Central Science Laboratory
859	CSPI	Center for Science in the Public Interest
860	CSR	Control Supply Rate
861	CSR	Corporate Social Responsibility
862	CSRC	Conflict Studies Research Centre
863	CSRF	Cross-Site Request Forgery
864	CST	Central Standard Time (UTC−6 hours)
865	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)
866	CTBT	Comprehensive [Nuclear] Test Ban Treaty
867	CTDB	Compact Terrain Data Base (file format)
868	CTGF	connective tissue growth factor
869	CTI	Co-operative Target Identification
870	CTIL	Critical Tracked Items List
871	CTIS	Central Tire Inflation System
872	CTMS	Clinical Trial Management System
873	CTSS	Compatible Time-Sharing System
874	CTU	Counter Terrorist Unit (fictional branch of the Central Intelligence Agency in the television action series 24)
875	CTVT	Canine Transmissible Venereal Tumour
876	Cu	Copper (Latin Cuprum)
877	CUB	Cuba (ISO 3166 trigram)
878	CUCV	Commercial Utility Cargo Vehicle
879	CUPS	Common Unix Printing System
880	CUPW	Canadian Union of Postal Workers
881	CUREA	Consortium for Undergraduate Research and Education in Astronomy
882	CuW	Copper-tungsten pseudo-alloy (from the chemical symbols of the two component elements)
883	CUW	Curaçao (ISO 3166 trigram)
884	CV	curriculum vitae (résumé)
885	CVLL	Crypto Variable Logic Label
886	CVSD	Continuous Variable Slope Delta (modulation)
887	CVT	Continuously Variable Transmission
888	CW	Calendar Week, or: Continuous Wave, or: Clothes Washer, or: Cook Islands (FIPS 10-4 territory code)
889	CWC	Chemical Weapons Convention
890	CWRU	Case Western Reserve University
891	CWS	Canadian Wildlife Service
892	CX	Christmas Island (ISO 3166 digram),or: One Hundred and Ten (in Roman numerals)
893	CXR	Christmas Island (ISO 3166 trigram)
894	CY	Calendar year, or: Cyprus (ISO 3166 and FIPS 10-4 country code digram)
895	CYM	Cayman Islands (ISO 3166 trigram)
896	CZE	Czech Republic (ISO 3166 trigram)
897	CZF	(Christian Zombie Fan)
898	CZMA	(US) Coastal Zone Management Act
899	d	Deci
900	D	Deuterium
901	DAFIF	Digital Aeronautical Flight Information File
902	DAK	Disney's Animal Kingdom
903	DAO	Division Ammunition Officer
904	DARE	Drug Abuse Resistance Education
905	DARO	(U.S.) Defense Airborne Reconnaissance Office
906	DARPA	U.S. Defense Advanced Research Projects Agency
907	DAS	Defensive Aids Suite
908	DASD	(U.S.) Deputy Assistant Secretary of Defense
909	DASL	Datapoint's Advanced Systems Language
910	DAU	(U.S.) Defense Acquisition University
911	DAWN	(U.S.) Drug Abuse Warning Network
912	dB	Decibel
913	DB	Deutsche Bahn
914	Db	Dubnium
915	DBA	De Bellis Antiquitatis (miniature wargaming rules)
916	DBBL	(U.S. Army Simulation Center) Dismounted Battlespace Battle Laboratory
917	DBDO	Desert BDO
918	DBE	Dame Commander of the Order of the British Empire
919	DBF	Detection By Fire (weapon launch signature)
920	DBR	De Bellis Renationis (miniature wargaming rules)
921	DBRA	Davis-Bacon Related Acts
922	DBS	Direct Broadcast Services (television)
923	DCAA	(U.S.) Defense Contract Audit Agency
924	DCAS	Devon and Cornwall Archery Society
925	DCC	Dallas Christian College
926	DCD	[Organ] Donation after Cardiac Death
927	DCE	Data Communication Equipment
928	DCFC	Death Cab for Cutie
929	DCL	Disney Cruise Line
930	DCN	Deacon
931	DCOM	Disney Channel Original Movie
932	DCSOPS	Deputy Chief of Staff for Operations and plans
933	DCW	Digital Chart of the World
934	DCYSC	Discovery Channel Young Scientist Challenge
935	DD	due diligence and dear daughter (increasingly prevalent on social mailing lists,blogs,and bulletin boards)
936	DDA	Deputy District Attorney
937	DDN	U.S. Defense Data Network
938	DDS	Doctor of Dental Surgery
939	DEA	Drug Enforcement Administration
940	DEA	Drug Enforcement Agency
941	DeCA	(U.S.) Defense Commissary Agency
942	DEFCON	Defence readiness condition
943	DELT	Dual Ended Line Test (ing)
944	DEPSECDEF	(U.S.) Deputy Secretary of Defense
945	DERA	British Defence Evaluation and Research Agency (1995-2001)
946	DES	Deep Ecliptic Survey
947	DEU	Germany (ISO 3166 trigram)
948	DFAS	(U.S.) Defense Finance and Accounting Service
949	DFCB	Data Format Control Book
950	DfID	UK Department for International Development
951	DFM	Discrete Field Model see Superluminal motion
952	DFM	Dynamic Flowgraph Methodology
953	DFSP	Dermatofibrosarcoma protuberans
954	DfT	UK Department for Transport
955	DGPS	Differential GPS
956	DGZ	Desired Ground Zero
957	DHA	DocosaHexaenoic Acid
958	DHHS	(U.S.) Department of Health and Human Services
959	DHRA	(U.S.) DoD Human Resources Activity
960	DHS	U.S. Department of Homeland Security
961	DHSS	UK Department of Health and Social Security
962	DHTFYSS	U.S. Don't Have Time For You Silly S****
963	DHY	Dahomey (ISO 3166 trigram; became BEN for Benin in 1977)
964	DIA	U.S. Defense Intelligence Agency
965	DIAC	Department of Immigration and Citizenship (Australia) [1]
966	DiC	Design Island Centre (computing usually used in a teaching situation)
967	DICASS	DIrectional Command Activated Sonobuoy System
968	DIFAR	DIrectional Frequency Analysis and Recording
969	DIME	Dense Inert Metal Explosive
970	DIP	Dual In-line Package (electronics)
971	DIPS	Defense independent pitching statistics
972	DIR	Defence Industrial Research
973	DISCOM	Division Support Command
974	DISE	Deployable Intelligence Support Element
975	DISSTAF	DIS Search and Target Acquisition Fidelity experiment
976	DITY	Do-It-Yourself
977	DIVAD	Division Air Defence
978	DIY	Do It Yourself
979	DJI	Djibouti (ISO 3166 trigram)
980	DK	Denmark (ISO 3166 digram)
981	DL	Dexter's Laboratory
982	DLIC	Detachment Left-In-Contact
983	DLIR	Depot-Level Inspection and Repair
984	DLPMC	DorsoLateral PreMotor Cortex
985	DLRP	Data Link Reference Point
986	DLS	Deep Lens Survey
987	DLSA	(U.S.) Defense Legal Services Agency
988	DLSc	Diploma in Library Science
989	DLTBGYD	Don't let the bastards grind you down
990	DMC	(U.S.) Defense Management Council
991	DMCA	Digital Millennium Copyright Act
992	DMM	Digital Multimeter
993	DMOC	Distributed Mission Operations Centre
994	DMPA	(U.S.) Defense Medical Programs Activity
995	DMPFC	DorsoMedial PreFrontal Cortex
996	DMPK	Drug Metabolism and Pharmacokinetics
997	DMRB	Design Manual for Roads and Bridges
998	DMS	U.S. Defense Message System
999	DMSP	U.S. Defense Meteorological Satellite Program
1000	DMT	Dimethyltryptamine
1001	DMV	Department of Motor Vehicles
1002	DMZ	DeMilitarized Zone
1003	DN	Deacon
1004	DNAW	Day Night All Weather
1005	DNDi	Drugs for Neglected Diseases initiative
1006	DNDO	U.S. Domestic Nuclear Detection Office
1007	DNK	Denmark (ISO 3166 trigram)
1008	DNM	Defence Nuclear Material
1009	DNR	Do Not Resuscitate
1010	DNS	Domain Name System
1011	DOB	Date Of Birth
1012	DOD	U.S. Department of Defense
1013	DODAF	U.S. Department of Defense Architectural Framework
1014	DoDD	U.S. Department of Defense Directive
1015	DoDEA	(U.S.) Department of Defense Education Activity
1016	DOE	U.S. Department of Energy
1017	DOHC	Dual-OverHead-Cam engine
1018	DOI	U.S. Department of the Interior
1019	DORA	Defence of the Realm Act
1020	DOS	Density of State
1021	DOTA	short-form for DEFENSE OF THE ANCIENTS a popular online epic game
1022	DotD	Deal of the Day (marketing gimmick)
1023	DOW	Died of Wounds
1024	DP	Division de production (Algerian petroleum company)
1025	DPA	UK Defence Procurement Agency
1026	DPCO	Double-Pole Change Over
1027	DPDT	Double-Pole Double-Throw
1028	DPI	Dots Per Inch
1029	DPICM	Dual-Purpose Improved Conventional Munition
1030	DPKO	UN Department for Peacekeeping Operations
1031	DPMO	(U.S.) Defense Prisoner of War/Missing Personnel Office
1032	DPPDB	Digital Point Positioning Database
1033	DPRK	Democratic People's Republic of Korea
1034	DPST	Double-Pole Single-Throw
1035	DRC	Democratic Republic of the Congo
1036	DRDC	Defence Research & Development Canada
1037	DREA	Defence Research Establishment Atlantic (obsolete 2002)
1038	DRES	Defence Research Establishment Suffield (obsolete 2002)
1039	DRET	Defence Research Establishment Toronto (obsolete 2002)
1040	DREV	Defence Research Establishment Valcartier (obsolete 2002)
1041	DRIC	(U.S.) Defense Research Information Center
1042	DRMS	(U.S.) Defense Revitalization and Marketing Service
1043	DRPR	Drawing Practices
1044	DRT	Document Related Technologies
1045	Ds	Darmstadtium
1046	DSAS	Disney Sing Along Songs
1047	DSB	(U.S.) Defense Science Board
1048	DSCS	U.S. Defense Satellite Communications System
1049	DSCSOC	DSCS Operations Center
1050	DSE	Dry Sheep Equivalent
1051	DSG	Direct-Shift Gearbox
1052	DSID	Dismounted Soldier Identification System
1053	DSL	Digital Subscriber Line
1054	DSLR	Digital single-lens reflex (camera)
1055	DSM	Diagnostic and Statistical Manual of Mental Disorders
1056	DSN	Deep Space Network
1057	DSPL	Design Specialists and Plans Language
1058	DSR	Deformed Special Relativity
1059	DST	Daylight Saving Time
1060	DSTL	British Defence Science and Technology Laboratory
1061	DSWA	(U.S.) Defense Special Weapons Agency
1062	DTA	Dental Technologists Association
1063	DTD	Digital Terrain Data
1064	DTG	Date-Time Group
1065	DTH	Direct To Home (television)
1066	DTI	UK Department of Trade and Industry
1067	DTIC	(U.S.) Defense Technical Information Center
1068	DTL	Diode-Transistor Logic (electronics)
1069	DTMF	Dual-tone multi-frequency signaling
1070	DTO	Disruptive Technology Office (was ARDA)
1071	DTR	Determine The Relationship
1072	DTSA	(U.S.) Defense Technology Security Administration
1073	DUMBO	Down Under the Manhattan Bridge Overpass (Brooklyn neighborhood)
1074	DUSD	(U.S.) Deputy Under-Secretary of Defense
1075	DVLC	UK Driver and Vehicle Licencing Centre
1076	DVM	Doctor of Veterinary Medicine
1077	DVO	Direct View Optics
1078	DVOM	Digital Volt-Ohm Meter
1079	DVP	various meanings (disambiguation page)
1080	DW	Drum Workshop
1081	DWIM	Do What I Mean
1082	DWM	Doctor Who Magazine
1083	DWTS	Dancing with the Stars
1084	DWW	Down with Webster
1085	DXA	Dual-energy X-ray Absorptiometry
1086	DXM	DeXtroMethorphan
1087	DY	Dahomey (ISO 3166 digram; obsolete since 1977)
1088	Dy	Dysprosium
1089	DZA	Algeria (ISO 3166 trigram)
1090	E	East
1091	EABU	Explain Acronyms Before Use
1092	EAC	Echelons Above Corps
1093	EAPC	Euro-Atlantic Partnership Council
1094	EAST	Experimental Advanced Superconducting Tokamak
1095	EBD	Electronic Brake Distribution
1096	EBE	Extraterrestrial Biological Entity
1097	EBSA	Employee Benefits Security Administration
1098	EBW	Electron Beam Welding
1099	EBW	Exploding BridgeWire
1100	ECASS	European Centre for Analysis in the Social Sciences [1]
1101	ECBR	European Coalition for Biomedical Research
1102	ECCM	Electronic Counter-Counter-Measures
1103	ECFS	Electronic Case Filing System
1104	ECG	Electrocardiogram
1105	ECHR	European Convention on Human Rights
1106	ECJ	European Court of Justice
1107	ECL	Emitter Coupled Logic (electronics)
1108	ECommHR	European Commission on Human Rights
1109	ECSC	European Coal and Steel Community (distant ancestor of the EU)
1110	ECT	ElectroConvulsive Therapy
1111	ECtHR	European Court of Human Rights
1112	EDA	European Defence Agency
1113	EDAC	Error Detection And Correction
1114	EDCS	Environmental Data Coding Specification
1115	EDH	Eastman Dental Hospital
1116	EDSA	Epifanio de los Santos Avenue (a major thoroughfare in Manila with great significance to post-1980 Philippines history)
1117	EDT	Eastern Daylight Saving Time (UTC−4 hours)
1118	EEC	European Economic Community (predecessor of the EU)
1119	EEG	ElectroEncephaloGram
1120	EENT	End Evening Nautical Twilight
1121	EEO	Equal Employment Opportunity
1122	EEOC	(U.S.) Equal Employment Opportunity Commission
1123	EEZ	Economic Exclusion Zone or Exclusive Economic Zone
1124	EFF	Electronic Frontier Foundation
1125	EFL	English as a Foreign Language
1126	EFM	Enterprise Feedback Management
1127	EFOA	European Fuel Oxygenates Association
1128	EFSA	European Food Safety Authority
1129	EFT	Electronic Fund Transfer
1130	EFV	Expeditionary Fighting Vehicle
1131	EG	Egypt (ISO 3166 digram; FIPS 10-4 country code)
1132	EGCG	EpiGalloCatechin-3-Gallate
1133	EGIS	Erieye Ground Interface Segment
1134	EGRET	Energetic Gamma-Ray Experiment Telescope
1135	EGY	Egypt (ISO 3166 trigram)
1136	EHF	Extremely High Frequency
1137	EHR	Equipment History Record
1138	Ei	Exbi
1139	EI	Ireland (FIPS 10-4 country code; from Éire)
1140	EIA	Environmental Impact Assessment
1141	EIAH	Encyclopedia of Iranian Architectural History
1142	EIAH	Environnements Informatiques pour l'Apprentissage Humain
1143	EIC	East India Company
1144	EICS	East India Company's Service
1145	eID	electronic ID
1146	EIRP	Effective Isotropic Radiated Power
1147	EIS	Environmental Impact Statement
1148	EJ	Exajoule
1149	EKG	Electrocardiogram (from German Elektrokardiogramm)
1150	EKMS	Electronic Key Management System
1151	EL	Exalitre
1152	ELINT	Electronic Intelligence
1153	ELL	English Language Learner
1154	ELM	Edge-Localised Mode (plasma physics)
1155	ELO	Electric Light Orchestra
1156	ELSS	Emergency Life Support Stores
1157	EM	ElectroMagnetism/ElectroMagnetic
1158	Em	Exametre
1159	EMA	European Medicines Agency
1160	EMCON	(Electromagnetic) Emissions Control
1161	EMDG	Euro-Missile Dynamics Group
1162	EMDR	Eye Movement Desensitisation and Reprocessing
1163	EMEA	Europe,Middle East and Africa
1164	EMG	ElectroMyoGraph
1165	EMP	ElectroMagnetic Pulse
1166	EMS	Emergency Medical Services
1167	EMT	Emergency Medical Technician
1168	ENCODE	Encyclopedia of DNA Elements (human genome data project)
1169	ENE	East North-East
1170	ENG	England (FIFA trigram; not eligible for an ISO 3166 or IOC trigram)
1171	ENTEC	Euro NATO Training Engineer Centre
1172	ENVL	Envelope
1173	ENY	Enemy
1174	EOD	Explosive Ordnance Disposal
1175	EOG	ElectroOculoGraphy
1176	EOM	End of Message
1177	EOSAT	Earth Observation Satellite
1178	EOSDIS	Earth Observation Satellite Data and Information System
1179	EP	European Parliament
1180	EP	Extended play
1181	EPCOT	Experimental Prototype Community Of Tomorrow
1182	EPGS	EOS Polar Ground Sites
1183	EPIRB	Emergency Position Indicating Radio Beacon
1184	EPL	English Premier League
1185	EPOS	Electronic Point Of Sale
1186	EPPA	Employee Polygraph Protection Act
1187	EPR	European Pressurised [Nuclear] Reactor
1188	EQ	Emotional Quotient
1189	Er	Erbium
1190	ERCIM	European Research Consortium for Informatics and Mathematics
1191	ERI	Eritrea (ISO 3166 trigram)
1192	ERLAWS	Eastern Ruapehu Lahar Alarm and Warning System
1193	EROS	Earth Resources Observation System
1194	ERP	Engineer Regulating Point
1195	ERR	Eesti Rahvusringhääling
1196	ERS	Earth Resources Survey
1197	ERTS	Earth Resources Technology Satellite (became Landsat)
1198	ERV	Endogenous RetroVirus
1199	ESD	ElectroStatic Discharge
1200	ESDP	European Security and Defence Policy
1201	ESE	East South-East
1202	ESH	Western Sahara (ISO 3166 trigram)
1203	ESL	English as a Second Language
1204	ESM	Electronic warfare Support Measures
1205	ESO	European Southern Observatory
1206	ESOL	English for Speakers of Other Languages
1207	ESPN	Entertainment and Sports Programming Network
1208	ESU	Emergency Services Unit
1209	ESV	Engineer Support Vehicle
1210	ET	Ethiopia (ISO 3166 digram; FIPS 10-4 country code)
1211	ETH	Ethiopia (ISO 3166 trigram)
1212	ETI	Extra-Terrestrial Intelligence
1213	ETLA	Extended TLA
1214	ETT	Embedded Training Team
1215	Eu	Europium
1216	EUCOM	(U.S.) European Command
1217	EUUSA	European Union and United States of America
1218	EV	Exavolt
1219	EVIL	Electronic viewfinder (with) interchangeable lens (a type of digital camera)
1220	EWTN	Eternal Word Television Network
1221	Exatesla	Extra Terrestrial
1222	EXREP	Expeditious Repair (SM&R code)
1223	f	Femto
1224	fA	Femtoampere
1225	FA	Food Addicts in Recovery Anonymous
1226	FAA	Financial Aid Administrator,Fleet Air Arm,Functional Area Analysis
1227	FAAD	Forward Area Air Defence
1228	FAADEZ	Forward Area Air Defence Engagement Zone
1229	FAAFP	Fellow of the American Academy of Family Physicians
1230	FAAN	Fellow of the American Academy of Neurology
1231	FAAN	Fellow of the American Academy of Nursing
1232	FAAQ	Frequently Asked and Anticipated Questions
1233	FAASV	Field Artillery Ammunition Supply Vehicle
1234	FAB	Feline Advisory Bureau (UK feline charity)
1235	FACA	(US) Federal Advisory Committee Act
1236	FACH	Fuerza Aérea de Chile
1237	FACN	Fellow of the American College of Nutrition
1238	FACP	Fellow of the American College of Physicians
1239	FACTS	Flexible Alternating Current Transmission System
1240	FAM	Foreign Affairs Manual
1241	FAO	Food and Agriculture Organization
1242	FAPA	Fellow of the American Psychological Association
1243	FAPHA	Fellow of the American Public Health Association
1244	FARP	Forward Arming and Refuelling Point / Forward Area Rearm/refuel Point
1245	FASCAM	Family of Scatterable Mines[1]
1246	FASD	Fetal Alcohol Spectrum Disorder
1247	FASEB	Federation of American Societies for Experimental Biology
1248	FAT	Field Artillery Tractor
1249	FAVS	Future Armoured Vehicle System
1250	FAW	Football Association of Wales
1251	FBCS	Fellow of the British Computer Society
1252	FBIDST	Fellow of the British Institute of Dental and Surgical Technologists
1253	FBIS	Foreign Broadcast Information Service
1254	FBM	Board foot
1255	fC	Femtocoulomb
1256	FCC	U.S. Federal Communications Commission
1257	FCE	First Certificate in English
1258	FCF	Financial Free Cash Flow
1259	FCLA	Fraud Claims Law Associate
1260	FCO	UK Foreign and Commonwealth Office
1261	FCW	Florida Championship Wrestling
1262	FD	Falun Dafa
1263	FDA	Food and Drug Administration (U.S.)
1264	FDBK	(I) Feedback
1265	Fe	Iron (Latin Ferrum)
1266	FEAST	Forum for European-Australian Science and Technology Cooperation
1267	FEATS	Festival of European Anglophone Theatrical Societies link title
1268	FEBA	Forward Edge of the Battle Area
1269	FED	Field Emission Display
1270	FEDEP	Federation Development Process (Simulation)
1271	FEF	Frontal Eye Field (neurophysiology)
1272	FEMA	Farm Equipment Manufacturers Association, U.S. Federal Emergency Management Agency,Fire Equipment Manufacturers' Association
1273	FENS	Federation of European Neuroscience Societies
1274	FES	Flywheel Energy Storage
1275	FEST	Frankfurt English Speaking Theatre link title
1276	FET	Field-effect transistor
1277	FEZ	Fighter Engagement Zone
1278	fF	Femtofarad
1279	FF	Final Fantasy
1280	FFB	Frum From Birth (referring to an observant Jew born into a religiously observant family)
1281	FFC	Free For Chat
1282	FFE	Fukuoka Futures Exchange
1283	FFF	Fédération française de football (French for: French Football Federation)
1284	FFG	Guided Missile Frigate (hull classification symbol)
1285	FFOV	Forward Field Of View
1286	FFR	Fédération française de rugby (French for: French Rugby (Union) Federation)
1287	FFS	For Fuck's Sake
1288	FFT	Final Fantasy Tactics
1289	FG	Falun Gong
1290	fg	Femtogram
1291	FG	Fog (METAR Code), French Guiana (FIPS 10-4 territory code)
1292	FGOTUS	First Gentleman of the United States
1293	FGR	Flickr Group Roulette
1294	fH	Femtohenry
1295	FHFIF	Foster's Home for Imaginary Friends
1296	FHI	Family Health International, Fuji Heavy Industries,Ltd.
1297	FI	Finland (ISO 3166 digram; FIPS 10-4 country code)
1298	FIAT	Fabbrica Italiana Automobili Torino (Italian for: Italian Car Factory of Turin)
1299	FIB	Fucking Illinois Bastard (Wisconsin slang, variants exist)
1300	FIBUA	Fighting In Built-Up Areas
1301	FIC	Fellowship for Intentional Community
1302	FID	Foreign Internal Defence
1303	FIE	Fly-In Echelon
1304	FIFA	Fédération internationale de football association (French for: International Association Football Federation)
1305	FIFe	Fédération internationale féline (French for: International Feline Federation)
1306	FIFO	First In, First Out
1307	FIFRA	Federal Insecticide, Fungicide, and Rodenticide Act
1308	FIGJAM	Fuck I'm Good, Just Ask Me
1309	FIMPT	Fellow of the Institute of Maxillofacial Prosthetists and Technologists
1310	FIN	Finland (ISO 3166 trigram)
1311	FINA	Fédération internationale de natation (French for: International Swimming Federation)
1312	FIRES	Fever Induced Refractory Epilepsy Syndrome or Febrile Infection-Related Epilepsy Syndrome
1313	FIS	Fédération internationale de ski (French for: International Ski Federation)
1314	FISA	Fédération Internationale des Sociétés d'Aviron (French for: International Federation of Rowing Associations)
1315	FISH	Fluorescence In-Situ Hybridisation
1316	FiST	Fire Support Team
1317	FITS	Flexible Image Transport System
1318	FIU	Florida International University
1319	fJ	Femtojoule
1320	FJ	Fiji (ISO 3166 digram; FIPS 10-4 country code)
1321	FJI	Fiji (ISO 3166 trigram)
1322	FJN	Financial Job Network
1323	FK	Falkland Islands (ISO 3166 digram; FIPS 10-4 territory code)
1324	fK	Femtokelvin
1325	FKSM	Fort Knox Supplemental Manual
1326	FKT	Fastest Known Time
1327	fL	Femtolitre
1328	FL	Florida (postal symbol)
1329	fl	floruit (Latin for: living) (genealogy)
1330	FLA	Florida,Front Line Assembly,Future Large Aircraft
1331	FLAB	Four-letter abbreviation
1332	FLAC	Free Legal Advice Centres
1333	FLAC	Free Lossless Audio Codec
1334	FLAK	Flug-Abwehr-Kanone (German for: Anti-Aircraft Guns)
1335	FLB	Forward Logistics Base
1336	FLET	Forward Line of Enemy Troops
1337	FLG	Falun Gong
1338	FLIP	Flight Information Publication
1339	FLIR	Forward Looking InfraRed (sensor)
1340	FLK	Falkland Islands (ISO 3166 trigram)
1341	FLOT	Forward Line of Own Troops
1342	FLOTUS	First Lady of the United States (the wife of the President of the United States)
1343	FLQ	Free Legal Questions
1344	FLQ	Front de libération du Québec (French for: Québec Liberation Front)
1345	FLSA	Fair Labor Standards Act
1346	FLTSAT	Fleet Satellite
1347	FLTSATCOM	Fleet Satellite Communication System
1348	FLUBOS	Fat, Lazy, Useless, Bag Of Shit
1349	FM	Factory Mutual
1350	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)
1351	fm	Femtometre
1352	Fm	Fermium
1353	FMC	Federal Magistrates' Court (an Australian federal court,formerly FMS),Food Machinery Corporation (original name of the company now known as FMC Corporation)
1354	FMCA	Federal Magistrates' Court of Australia (used for citing decisions of the FMC other than family law decisions)
1355	FMCAfam	Federal Magistrates' Court of Australia: family (used for citing family law decisions of the FMC)
1356	FMCG	Fast Moving Consumer Goods
1357	FME	Formal Methods Europe
1358	FMECA	Failure Modes and Effect Criticality Analysis
1359	FMJD	Fédération Mondiale du Jeu de Dames
1360	FMLA	Family Medical Leave Act
1361	FoE	Friends of the Earth
1362	FOGC	Federal Oil and Gas Council
1363	FOH	Front Of House
1364	FOIA	Freedom of Information Act
1365	FOM	Federation Object Model
1366	FONSI	Finding of No Significant Impact
1367	FOO	Forward Observation Officer
1368	FOOP	Friends Of Organ Pipes (Volunteer group)
1369	FoS	Family of Systems
1370	FOSE	Fallout 3 Script Extender
1371	FOSE	Federal Office Systems Expo
1372	FOT	Free on truck
1373	FOTA	Fellow of the Orthodontic Technicians Association
1374	FOTC	Flight of the Conchords
1375	FOUO	For Official Use Only
1376	FP	French Polynesia (FIPS 10-4 territory code)
1377	FPF	Federação Portuguesa de Futebol (Portuguese for: Portuguese Football Federation), Final Protective Fire
1378	FPS	Fire Prevention System
1379	FQ	Baker Island (FIPS 10-4 territory code),French Southern and Antarctic Territories (ISO 3166 digram; obsolete 1979)
1380	FR	France (FIPS 10-4 country code; ISO 3166 digram)
1381	Fr	Francium
1382	FRA	Federal Railroad Administration, France (ISO 3166 trigram)
1383	FRAND	Fair,reasonable,and non-discriminatory (concept in standards-setting and intellectual property law)
1384	FRCP	Federal Rules of Civil Procedure,Fellow of the Royal College of Physicians
1385	FRICBM	Full Range ICBM
1386	FRO	Faroe Islands (ISO 3166 trigram)
1387	FRS	Fellow of the Royal Society, U.S. Federal Reserve System
1388	FRSA	Fellow of the Royal Society of Art
1389	FRY	Federal Republic of Yugoslavia
1390	fs	Femtosecond
1391	fS	Femtosiemens
1392	FSA	Fire Support Area, UK Food Standards Agency, Functional Solution Analysis
1393	FSC	Federal Supply Classification, Forest Stewardship Council (ecological pressure group)
1394	FSCL	Fire Support Co-ordination Line
1395	FSE	Fire Support Element
1396	FSF	Free Software Foundation
1397	FSH	Follicle Stimulating Hormone
1398	FSI	Fuel Stratified Injection
1399	FSS	Fire Support Station
1400	FSSP	Families of Structurally Similar Proteins
1401	FSTC	Foreign Science Technology Center (now NGIC)
1402	fT	Femtotesla
1403	FTC	Federal Trade Commission
1404	FTE	Full Time Equivalent
1405	FTL	Faster Than Light
1406	FTS	Flight Termination System used during some rocket launches
1407	FTS	Fuck That Shit
1408	FU	Smoke (METAR Code)
1409	FUBAR	Fucked/Fouled Up Beyond All Recognition/Repair
1410	fV	Femtovolt
1411	fW	Femtowatt
1412	FW	Forward
1413	FWC	Football World Cup
1414	FWF	Fixed Word Format
1415	FWI	French West Indies
1416	FWIW	For What It's Worth
1417	FWS	U.S. Fish and Wildlife Service
1418	FWT	Fresh Water Tank
1419	FXX	Metropolitan France (ISO 3166 trigram; obsolete 1997)
1420	FYA	For Your Agenda
1421	FYDP	Five-Year Defense Plan (U.S.)
1422	FYI	For Your Information
1423	FYROM	Former Yugoslav Republic of Macedonia
1424	FZDZ	Freezing Drizzle (METAR Code)
1425	FZFG	Freezing Fog (METAR Code)
1426	FZRA	Freezing Rain (METAR Code)
1427	g	Gram
1428	G3	Heckler & Koch G3
1429	GAAR	General Anti-Avoidance Rule (tax evasion)
1430	GAB	Gabon (ISO 3166 trigram)
1431	GABA	Gamma-AminoButyric Acid
1432	GAD	Generalized Anxiety Disorder
1433	GAF	Garfield and Friends
1434	GAO	U.S. Government Accountability Office
1435	GAW	Global Atmospheric Watch
1436	GBBC	Great (Global) Backyard Bird Count
1437	GBE	Knight/Dame Grand Cross of the Order of the British Empire
1438	GBR	United Kingdom of Great Britain and Northern Ireland (ISO 3166 trigram)
1439	GCA	Graduate in Claims Administration
1440	GCD	see entry
1441	GCF	Greatest Common Factor
1442	GCI	Ground-controlled interception
1443	GCN	Gamma-ray burst Coordination Network
1444	GCS	Global Coordinate System
1445	GCSE	General Certificate of Secondary Education (UK)
1446	Gd	Gadolinium
1447	GD	Grenada (ISO 3166 digram)
1448	GDL	Game Definition Language
1449	GDR	General Distribution Release (Microsoft Term for a software service release; between Hotfix and Service Pack)
1450	GDR	German Democratic Republic (cf. DDR)
1451	GDW	Game Designers Workshop
1452	Ge	Germanium
1453	GEBCO	General Bathymetric Chart of the Oceans
1454	GEC	Great Engineering Challenge
1455	GED	General Educational Development (high school equivalency credential in the U.S. and Canada)
1456	GEEP	Geophysical Equipment Exploration Platform
1457	GEN	Full General (four stars) in the U.S. Army
1458	GeV	Gigaelectron-volt
1459	GEV	Ground Effect Vehicle
1460	GFCI	Ground Fault Circuit Interruptor (aka GFI)
1461	GFI	Ground Fault Interruptor (aka GFCI)
1462	GFL	German Football League (Germany's Bundesliga for American football; the English-language name is used in German without translation)
1463	GFN	Global Footprint Network
1464	GG	Georgia (FIPS 10-4 country code)
1465	GGK	Good God Karma
1466	GHA	Ghana (ISO 3166 trigram)
1467	GHB	gamma-Hydroxybutyric acid
1468	Gi	Gibi
1469	GIB	Gibraltar (ISO 3166 trigram)
1470	GIG	Global Information Grid
1471	GINO	Godzilla In Name Only
1472	GISS	General Impression of Size and Shape,Goddard Institute for Space Studies
1473	GJD	Geocentric Julian Day
1474	GLAAD	Gay and Lesbian Alliance Against Defamation
1475	GLAC	General Ledger Accounting Code
1476	GLAST	Gamma-ray Large Area Space Telescope
1477	GLBA	Gramm-Leach-Bliley Act
1478	GLC	Gas-liquid chromatography
1479	GLP	Guadeloupe (ISO 3166 trigram)
1480	GLV	Gained Life Value
1481	Gm	Gigametre
1482	GM	The Gambia (ISO 3166 digram),GameMaster (role-playing),General Motors,Genetically Modified,Germany (FIPS 10-4 country code),Guru Meditation (computing)
1483	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
1484	GMB	The Gambia (ISO 3166 trigram),General,Municipal,Boilermakers (and Allied Trade Union)
1485	GMFSC	Ground Mobile Forces Satellite Communications
1486	GMO	Genetically Modified Organism
1487	GMPCS	Global Mobile Personal Communications by Satellite
1488	GNAS	Grand National Archery Society
1489	GNB	Guinea-Bissau (ISO 3166 trigram)
1490	GNP	Gross National Product
1491	GNQ	Equatorial Guinea (ISO 3166 trigram)
1492	GnRH	Gonadotropin-Releasing Hormone
1493	GO	Glorioso Islands (FIPS 10-4 territory code)
1494	GOA	General of the Army (United States only)
1495	GOAT	Greatest Of All Time
1496	GOC	General Officer Commanding
1497	GOES	Geostationary Operational Environmental Satellite
1498	GOP	Grand Old Party
1499	gorp	granola,oats,raisins,peanuts (another name for trail mix),probably a backronym
1500	GOSC	General Officer Steering Committee
1501	GOSH	Great Ormond Street Hospital
1502	GOSP	Gas/Oil Separation Plant
1503	GOTS	Government off-the-shelf
1504	GOYADIN	Get Off Your Arse,Do It Now (anti-procrastination mantra)
1505	GP	General Practitioner,General Purpose,Grand Prix,Guadeloupe (ISO 3166 digram; FIPS 10-4 territory code)
1506	GPA	Grade Point Average
1507	GPC	Global Path Cache
1508	GPIB	General-Purpose Instrumentation/Interface Bus
1509	GPO	General Post Office
1510	GPPC	Genetics and Public Policy Center
1511	GPR	Ground-Penetrating Radar
1512	GPS	General Problem Solver,Global Positioning System
1513	GPT	General Purpose Technology, Get paid to surf (an online business model)
1514	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]
1515	GR	Greece (FIPS 10-4 country code; ISO 3166 digram),Hail (METAR Code)
1516	GRAIL	Gravity Recovery and Interior Laboratory
1517	GRAS	Generally recognized as safe (FDA list)
1518	GRB	Gamma-Ray Burst
1519	GRC	Greece (ISO 3166 trigram)
1520	GRD	Grenada (ISO 3166 trigram)
1521	GRE	Graduate Record Examination,Greece (IOC and FIFA trigram,but not ISO 3166)
1522	grep	[search] Globally for Regular Expression,Print [lines]
1523	GRID	Gay-Related Immune Deficiency (original name of AIDS)
1524	GRid	Global Release Identifier,a music industry identifier from the RIAA and IFPI
1525	GriT	Girl raised in Texas (Woman presenting firm southern traits/beliefs)
1526	GRL	Greenland (ISO 3166 trigram)
1527	GRN	Grenada (IOC and FIFA trigram,but not ISO 3166),Goods Received Note
1528	Gs	Gigasecond
1529	GSA	U.S. General Services Administration
1530	GSD	Graphical Situation Display
1531	GSGB	(God send glamour boy 9-10/10)
1532	GSK	GlaxoSmithKline [good sexual karma]
1533	GSN	Game Show Network
1534	GSO	General Services Officer (U.S. Department of State)
1535	GSOH	Good Sense Of Humour
1536	GSP	Georges St-Pierre (Canadian MMA fighter)
1537	GSR	Gun Shot Residue
1538	GSS	Generic Security Services
1539	GSW	Gunshot wound
1540	GTD	Getting Things Done
1541	GTG	Got To Go (Internet chat)
1542	GTGN	Getty Thesaurus of Geographic Names
1543	GTK	Good To Know (Internet chat)
1544	GTM	Guatemala (ISO 3166 trigram)
1545	GU	Guam (postal symbol; ISO 3166 digram)
1546	GUF	French Guiana (ISO 3166 trigram)
1547	GUILT	Gangliated Utrophin Immuno Latency Toxin
1548	GULCR	Grupo de Usuarios de Linux de Costa Rica
1549	GUT	Grand Unification Theory
1550	GWARS	Ground Warfare System (simulation)
1551	GWAS	Grand Western Archery Society
1552	GWOT	Global War on Terrorism
1553	GXE	Gene-enivronment interaction
1554	GXM	Matrox Graphics eXpansion Module
1555	GY	Guyana (FIPS 10-4 country code; ISO 3166 digram)
1556	GZK	Greisen-Zatsepin-Kuzmin cut-off (cosmic ray energies)
1557	h	Hecto
1558	HAARP	High Frequency Active Auroral Research Program
1559	HAART	Highly Active Anti-Retroviral Therapy
1560	HAI	Human Awareness Institute
1561	HAL	Hardware Abstraction Layer
1562	HALO	High Altitude Low Opening (parachute jump)
1563	HAM	Amateur radio operator
1564	HANS	Head And Neck Support (device used in many race cars)
1565	HARM	High-speed Anti-Radiation Missile
1566	HAW	Heavy Antitank Weapon
1567	HAWK	Homing All the Way Killer (air defence system)
1568	HAZ	Heat-Affected Zone
1569	HAZMAT	Hazardous Materials
1570	HBCD	HexaBromoCycloDodecane
1571	HBO	Home Box Office
1572	HBR	Harvard Business Review
1573	HBT	Heterojunction Bipolar Transistor
1574	HBV	Hepatitis B Virus
1575	HCCI	Homogeneous Charge Compression Ignition
1576	HCF	Highest Common Factor
1577	HCSC	Higher Command and Staff Course
1578	HDL	High-Density Lipoprotein
1579	HDM	Human Decision-Making
1580	HDRA	Henry Doubleday Research Association
1581	He	Helium
1582	HE	High Explosive
1583	HEAT	High Explosive Anti-Tank (ammunition)
1584	HEBA	Hellenic Basketball Clubs Association
1585	HEER	High-Explosive Extended Range (ammunition)
1586	HEIC	Honourable East India Company
1587	HEMP	High-Altitude Electromagnetic Pulse
1588	HEOSS	High Earth Orbit Space Surveillance
1589	HEP	High-Explosive Plastic (ammunition)
1590	HEPA	High-Efficiency Particulate Air (filter)
1591	HESV	Heavy Engineering Support Vehicle
1592	HETT	Heavy Equipment Transporting Truck / Heavy Equipment Truck Tractor
1593	HEU	Highly Enriched Uranium
1594	Hf	Hafnium
1595	HF	High Frequency
1596	HFE	Human Fertilisation and Embryology (UK Act)
1597	HFE	The common-emitter current gain in a BJT transistor (also represented by βF). See: BJT
1598	HFEA	Human Fertilisation and Embryology Authority (UK)
1599	Hg	Mercury (Latin Hydrargyrum)
1600	HGC	UK Human Genetics Commission
1601	HGF	Human Growth Factor
1602	HGTV	Home & Garden Television
1603	HI	Hawaii (postal symbol)
1604	HIH	His (or Her) Imperial Highness
1605	HIM	His (or Her) Imperial Majesty
1606	HIMAD	High to Medium Altitude Air Defence (see also H/MAD)
1607	HIMEZ	High Altitude Missile Engagement Zone
1608	HIMYM	How I Met Your Mother
1609	HIPAA	U.S. Health Insurance Portability and Accountability Act
1610	Hipparcos	HIgh Precision Parallax COllecting Satellite
1611	Hird	Hurd of interfaces representing depth (cf. HURD)
1612	HiRISE	High Resolution Imaging Science Experiment
1613	HIT	Health Information Technology
1614	HIV	Human Immunodeficiency Virus
1615	HIWT	Hobart Institute of Welding Technology
1616	HJD	Heliocentric Julian Day
1617	HK	Hong Kong (ISO 3166 digram; FIPS 10-4 territory code)
1618	HKG	Hong Kong (ISO 3166 trigram)
1619	HKS	HyperKinetic Syndrome
1620	hL	Hectolitre
1621	HL	Holding Line
1622	HLL	High-Level Language
1623	HLN	Headline News
1624	HLOS	High Level Output Specification
1625	HM	Heard Island and McDonald Islands (ISO 3166 digram; FIPS 10-4 territory code)
1626	HMCE	Her/His Majesty's Customs and Excise (former UK government department; succeeded by HM Revenue and Customs)
1627	HMD	Heard and McDonald Islands (ISO 3166 trigram)
1628	HMF	HydroxyMethyl Furfural
1629	HMO	Health maintenance organization
1630	HMP	Her Majesty's Prison
1631	HMRC	Her/His Majesty's Revenue and Customs
1632	HMSO	Her Majesty's Stationery Office
1633	HMV	His Master's Voice
1634	HN	Honduras (ISO 3166 digram)
1635	HND	Honduras (ISO 3166 trigram)
1636	Ho	Holmium
1637	HO	Honduras (FIPS 10-4 country code)
1638	HOLLAND	Hope Our Love Lasts And Never Dies
1639	HOSTAC	Helicopter Operations from Ships Other Than Aircraft Carriers
1640	HOT	Highly Optimised Tolerance
1641	HOTAS	Hands on throttle-and-stick
1642	HOV	High Occupancy Vehicle
1643	hp	horse power
1644	HPA	UK Health Protection Agency
1645	HPCL	Hindustan Petroleum Corporation Limited
1646	HPLC	High Performance Liquid Chromatography
1647	HPT	High[er] Payoff Target
1648	HPV	Human Papilloma Virus
1649	HRBL	High-level Representation of Behavior Language (original name of the Herbal language)
1650	HRD	Human Resource Development
1651	HRF	High iness Forces
1652	HRH	His (or Her) Royal Highness
1653	HRM	His (or Her) Royal Majesty
1654	HRM	Human Resource Management
1655	HRT	Hormone Replacement Therapy
1656	Hs	Hassium
1657	HSBC	The Hong Kong and Shanghai Banking Corporation
1658	HSC	Higher School Certificate
1659	HSM	High School Musical
1660	HSMAD	Human Science/Modeling and Analysis Data
1661	HSN	Home Shopping Network
1662	HSPH	Harvard School of Public Health
1663	HSSI	High-Speed Serial Interface
1664	HST	see entry
1665	HTA	HyperText Application
1666	HTFU	Harden The Fuck Up
1667	HTH	Hope That Helps
1668	HTI	Haiti (ISO 3166 trigram)
1669	HTML	HyperText Markup Language
1670	HTR	Heated Towel Rail
1671	HTS	High-Temperature Superconducting wire
1672	HTTP	HyperText Transfer Protocol
1673	HU	Hungary (ISO 3166 digram; FIPS 10-4 country code)
1674	HUHA	Head up his/her ass (Marine salute; probably a backcronym)
1675	HUN	Hungary (ISO 3166 trigram)
1676	HURD	Hird of Unix-Replacing Daemons (cf. Hird)
1677	HV	Upper Volta (ISO 3166 digram; obsolete 1984)
1678	HVAP	High Velocity Armour Piercing (ammunition)
1679	HVHF	High velocity human factors
1680	HVM	High Velocity Missile
1681	HVO	Upper Volta (ISO 3166 trigram; obsolete 1984)
1682	HWM	Hardware morphing (computer graphics rendering)
1683	HXB	The glycoprotein Tenascian C
1684	HZ	Haze (METAR Code)
1685	Hz	Hertz
1686	IA	Iowa (postal symbol)
1687	IAAL	I Am A Lawyer
1688	IAB	International Association for Biologicals
1689	IAD	Ion Assisted Deposition
1690	IADS	Integrated Air Defence System
1691	IAEA	International Atomic Energy Agency
1692	IAF	{i} Industrial Areas Foundation
1693	IAFG	Information Assurance Focus Group
1694	IANA	Internet Assigned Numbers Authority
1695	IANAL	I Am Not A Lawyer
1696	IAS	Image Assessment System
1697	IASIP	It's Always Sunny in Philadelphia
1698	IATA	International Air Transport Association
1699	IATF	International Automotive Task Force
1700	IATSE	International Alliance of Theatrical Stage Employees
1701	IAUC	International Astronomical Union Circular
1702	IAW	In Accordance With
1703	IB	International Baccalaureate
1704	IBA	Important Bird Area
1705	IBD	Inflammatory Bowel Disease
1706	IBDM	Information Based Decision Making
1707	IBM	International Business Machines
1708	IBRD	International Bank for Reconstruction and Development (part of the World Bank)
1709	IBS	Irritable Bowel Syndrome
1710	ICANN	Internet Corporation for Assigned Names and Numbers
1711	ICAO	International Civil Aviation Organization
1712	ICBM	Intercontinental Ballistic Missile
1713	ICBN	International Code of Botanical Nomenclature
1714	ICE	In case of emergency
1715	ICES	International Council for the Exploration of the Sea
1716	ICF	Intelligent Community Forum
1717	ICMP	Internet Control Message Protocol
1718	ICNAF	International Commission for the Northwest Atlantic Fisheries (became NAFO in 1978)
1719	ICO	Intermediate Circular Orbit
1720	ICPE	International Conference on Pharmacoepidemiology,the annual conference of the International Society for Pharmacoepidemiology
1721	ICRAF	International Centre for Research in Agroforestry (a.k.a. World Agroforestry Centre since 2002)
1722	ICRISAT	International Crops Research Institute for the Semi-Arid Tropics
1723	ICRL	Individual Component Repair List
1724	ICRS	International Celestial Reference System
1725	ICSI	Intracytoplasmic Sperm Injection
1726	ICT	Information and communication technologies
1727	ICTH	Island Closest to Heaven/Hell Final Fantasy VIII
1728	ICV	Infantry Carrier Vehicle
1729	ICYMI	In Case You Missed It
1730	IDC	International Data Corporation
1731	IDDI	I don't do initialisms (see irony)
1732	IDGAF	I don't give a fuck
1733	IDK	I don't know
1734	IDL	Interface Definition Language
1735	IDN	Indonesia (ISO 3166 trigram)
1736	IEA	International Energy Agency
1737	IEC	International Electrotechnical Commission
1738	IED	Improvised Explosive Device
1739	IELTS	International English Language Testing System
1740	IER	Information Exchange Requirement
1741	IET	Initial Entry Training
1742	IET	Institution of Engineering and Technology
1743	IETF	Internet Engineering Task Force
1744	IEW	Intelligence and Electronic Warfare
1745	IFAB	International Football Association Board
1746	IFAH	International Federation for Animal Health
1747	IFAP	International Federation of Agricultural Producers
1748	IFO	Identified Flying Object (see also UFO)
1749	IFOV	Instantaneous Field of View
1750	IFPI	International Federation of Phonographic Industries
1751	IFRB	International Frequency Registration Board
1752	IFV	Infantry Fighting Vehicle
1753	IG	Inspector General
1754	IGNOU	Indira Gandhi National Open University
1755	IGS	International Ground Station
1756	IHH	Idiopathic Hypogonadotropic Hypogonadism
1757	IHO	International Hydrographic Organization
1758	IHR	Institute for Historical Review
1759	IHSI	Institutum Historicum Societatis Iesu (Jesuit Historical Institute)
1760	II	Two (in Roman numerals)
1761	IICA	Inter-American Institute for Cooperation on Agriculture
1762	IIE	Innovative Interstellar Explorer
1763	III	Three (in Roman numerals)
1764	IIRC	If I Recall/Remember Correctly
1765	IISS	International Institute for Strategic Studies
1766	IJN	Imperial Japanese Navy (World War II)
1767	IJWP	Interim Joint Warfare Publication
1768	ILDS	Improved Landmine Detection System
1769	ILO	International Labour Organization
1770	ILRI	International Livestock Research Institute
1771	ILY	I Love You [pronounced ILL-LEE]
1772	IMBD	International Migratory Bird Day
1773	IMDb	Internet Movie Database
1774	IME	In My Experience
1775	IMHO	In My Humble/Honest Opinion
1776	IML	International Mister Leather
1777	IMNSHO	In My Not So Humble Opinion
1778	IMPAC	International Merchant Purchase Authorization Card
1779	IMPACT	International Medical Products Anti-Counterfeiting Taskforce
1780	IMPATT	IMPact Avalanche Transit Time diode
1781	IMPT	Institute of Maxillofacial Prosthetists and Technologists
1782	IMRL	Individual Material iness List
1783	IMRO-Internal Macedonian Revolutionary Organization	Irish Music Rights Organisation
1784	IMsL	International Ms. Leather
1785	IMT	Integrated Management Tool
1786	IMU	International Mathematical Union
1787	In	Indium
1788	INA	Immigration and Nationality Act
1789	INAS	International Near-Earth Asteroid Survey
1790	INCITS	InterNational Committee for Information Technology Standards
1791	IND	India (ISO 3166 trigram)
1792	INDIGO	(U.S.) INtelligence DIvision Gaming Operation
1793	inet	the Internet
1794	INFORMS	(U.S.) Institute for Operations Research and the Management Sciences
1795	INFOSEC	Information Security
1796	INLA	Irish National Liberation Army
1797	INMARSAT	International Maritime Satellite organization
1798	INRIA	Institut national de recherche en informatique et en automatique
1799	INS	Immigration and Naturalization Service
1800	InSAR	Interferometric synthetic aperture radar
1801	INST	Information Standards and Technology
1802	INTERFET	International Force for East Timor
1803	INTSUM	Intelligence Summary
1804	IO	British Indian Ocean Territory (ISO 3166 digram; FIPS 10-4 territory code)
1805	IOT	British Indian Ocean Territory (ISO 3166 trigram)
1806	IPB	Intelligence Preparation of the Battlefield
1807	IPL	Inferior Parietal Lobule
1808	IPO	Initial Public Offering
1809	IPT	Integrated Product/Project Team
1810	IPTS	Institute for Prospective Technological Studies
1811	IPTV	Internet Protocol TeleVision
1812	IPW	Interrogation of Prisoners of War
1813	Ir	Iridium
1814	IRAD	Internal Research and Development
1815	IRAN	(I) Inspect and Repair As Necessary
1816	IRAS	Infrared Astronomical Satellite
1817	IRB	International Rugby Board
1818	IRBM	Intermediate Range Ballistic Missile
1819	IREA	Intermountain Rural Electric Association
1820	IRINN	Islamic Republic of Iran News Network
1821	IRL	Ireland (ISO 3166 trigram),Industrial Research Limited,Indy Racing League,In real life
1822	IRN	Iran (ISO 3166 trigram)
1823	IRO	International Refugee Organisation
1824	IRQ	Iraq (ISO 3166 trigram)
1825	IRS	U.S. Internal Revenue Service
1826	IRST	Infra-red Search and Track
1827	ISAAA	International Service for the Acquisition of Agri-biotech Applications
1828	ISAR	Inverse SAR (Synthetic Aperture Radar)
1829	ISB	Intermediate Staging Base
1830	ISBN	International Standard Book Number (ISO 2108)
1831	ISCCP	International Satellite Cloud Climatology Project
1832	ISCII	Indian Standard Code for Information Interchange
1833	ISDN	Integrated Services Digital Network
1834	ISEF	Intel International Science and Engineering Fair
1835	ISEN	Internet Search Environment Number
1836	ISF	Internal Security Force
1837	ISIL	Islamic State of Iraq and the Levant
1838	ISIS	Institute for Science and International Security, or: Islamic State of Iraq and Syria
1839	ISL	Iceland (ISO 3166 trigram)
1840	ISLN	International Standard Lawyer Number (used initially by LexisNexis Martindale-Hubbell)
1841	ISMB	International Society of Matrix Biologists
1842	ISMC	Intelligent Sounding Meaningless Conversation
1843	ISOGP	Indian Society of Orthodontics for General Practitioners [2]
1844	ISPE	International Society for Pharmacoepidemiology
1845	ISRO	Indian Space Research Organisation
1846	ISSCR	International Society for Stem Cell Research
1847	ISSN	International standard serial number (ISO 3297)
1848	ISTC	Institute of Scientific and Technical Communications (UK)
1849	ISTS	Intel Science Talent Search
1850	ITA	Italy (ISO 3166 trigram)
1851	ITAG	Inertial Terrain-Aided Guidance
1852	ITALY	I'll Truly Always Love You
1853	ITAS	Improved Target Acquisition Sight
1854	ITC	InferoTemporal Cortex (neurophysiology)
1855	ITCZ	Intertropical Convergence Zone
1856	ITEC	Information Technology Exposition & Conference
1857	ITEMS	Interactive Tactical Environment Management System
1858	ITER	International Thermonuclear Experimental Reactor
1859	ITF	International Tennis Federation
1860	ITK	In The Know
1861	ITN	Independent Television News (British)
1862	ITT	International Telephone and Telegraph (U.S.)
1863	ITTO	International Tropical Timber Organization
1864	IUCN	International Union for the Conservation of Nature and Natural Resources (World Conservation Union)
1865	Iveco	Industrial Vehicles Corporation
1866	IVF	In Vitro Fertilisation
1867	IVI	Interchangeable Virtual Instrument
1868	IVIS	Inter-Vehicle Information System
1869	IVL	Inter-Visibility Line
1870	IVM	In Vitro [Oocyte] Maturation
1871	IVO	In Vicinity Of
1872	IW	Information Warfare
1873	IWARS	Infantry Warrior Simulation
1874	IWC	International Whaling Commission
1875	IWW	Industrial Workers of the World
1876	IX	Nine (in Roman numerals)
1877	IXT	IntraText digital library; IntraText lexical hypertext
1878	IY	Saudi-Iraqi neutral zone (FIPS 10-4 territory code; obsolete 1993)
1879	IZ	Iraq (FIPS 10-4 country code)
1880	J	Joule
1881	J1	Joint [Manpower &] Personnel Directorate
1882	J2	Joint Intelligence Directorate
1883	J3	Joint Operations Directorate
1884	J4	Joint Logistics Directorate
1885	J5	Joint Strategic Plans & Policy Directorate
1886	J7	Joint Operational Plans & Interoperability Directorate
1887	JA	Japan (FIPS 10-4 country code)
1888	JAFT	Just A Field Test
1889	JAL	Japan Airlines
1890	JALLC	Joint Analysis and Lessons Learned Centre (NATO)
1891	JAM	Jamaica (ISO 3166 trigram)
1892	JAMA	Journal of the American Medical Association
1893	JANET	Joint Academic Network
1894	JATO	Jet-Assisted Take-Off
1895	JB	Jail Bait
1896	JB	Junior Branch
1897	JBFSA	Joint Blue Force Situational Awareness
1898	JCDB	Joint Common Data Base
1899	JCDS	Joint Chiefs of the Defence Staff
1900	JCIDS	Joint Capabilities Integration and Development System
1901	JCL	Job Control Language
1902	JCP	Java Community Process
1903	JCS	Joint Chiefs of Staff
1904	JCW	Juggalo Championship Wrestling
1905	JDBC	Java Data Base Connectivity
1906	JDEM	Joint Dark Energy Mission
1907	JDL	Jewish Defense League
1908	JE	Jersey (FIPS 10-4 territory code)
1909	JEFX	Joint Expeditionary Force eXperiment
1910	JET	Joint European Torus
1911	JEZ	Joint Engagement Zone
1912	JFACC	Joint Force Air Component Commander
1913	JFACTSU	U.S. Joint Forward Air Control Training and Standards Unit
1914	JFC	Joint Force Commander
1915	JFK	John Fitzgerald Kennedy or the airport named after him.
1916	JFLCC	Joint Force Land Component Commander
1917	JFMCC	Joint Force Maritime Component Commander
1918	JFO	Journal of Field Ornithology
1919	JFSOCC	Joint Force Special Operations Component Commander
1920	JFTX	Joint Field Training Exercise
1921	JH	Japan Highway Public Corporation
1922	JH	Jharkhand (Indian state code)
1923	JI	Joint Implementation
1924	JIB	Joint Information Bureau
1925	JIC	Joint Intelligence Centre
1926	JINI	Java Intelligent Network Infrastructure
1927	JITC	Joint Interoperability Test Command
1928	JIVE	Joint Institute for VLBI (Very Long Baseline Interferometry) in Europe
1929	JJAP	Japanese Journal of Applied Physics
1930	JL	Japan Airlines (IATA airline designator)
1931	JLA	Justice League of America
1932	JM	Jamaica (FIPS 10-4 country code; ISO 3166 digram)
1933	JMS	Java Message Service
1934	JN	Jan Mayen Island (FIPS 10-4 territory code)
1935	JNI	Java Native Interface
1936	JNLP	Java Network Launch Protocol
1937	JO	Jordan (FIPS 10-4 country code; ISO 3166 digram)
1938	JOA	Joint Operations Area
1939	JOPES	Joint Operations Planning and Execution System
1940	JOR	Jordan (ISO 3166 trigram)
1941	JOTS	Joint Operations Tactical System
1942	JPL	Jet Propulsion Laboratory
1943	JPN	Japan (ISO 3166 trigram)
1944	JPOW	Joint Project Optic Windmill
1945	JRDF	Joint Rapid Deployment Forces
1946	JRE	Java Runtime Environment
1947	JREF	James Randi Educational Foundation
1948	JROC	Joint Requirements Oversight Council
1949	JROCM	JROC Memorandum
1950	JRRF	Joint Rapid Reaction Force
1951	JRSAI	Journal of the Royal Society of Antiquaries of Ireland
1952	JSAP	Japan Society of Applied Physics
1953	JSCSC	Joint Services Command and Staff College
1954	JSEAD	Joint Suppression of Enemy Air Defence (see SEAD)
1955	JSF	Joint Strike Fighter
1956	JSIMS	Joint Simulation System
1957	JSOA	Joint Special Operations Area
1958	JSOTF	Joint Special Operations Task Force
1959	JSP	JavaServer Page
1960	JSP	Joint Services Publication
1961	JSR	Java Specification Request
1962	JSS	Joint Support Ship Project
1963	JTC	Joint Training Confederation
1964	JTF	Joint Task Force
1965	JTFEX	Joint Task Force Exercise
1966	JTLS	Joint Theater Level Simulation
1967	JTMD	Joint Theatre Missile Defence
1968	JTN	Johnston Atoll (ISO 3166 trigram; obsolete 1986)
1969	JU	Juan de Nova Island (FIPS 10-4 territory code)
1970	JUGFET	JUnction Gate Field-Effect Transistor
1971	JUICE	JUpiter ICy Moon Explorer
1972	JUO	Joint Urban Operations
1973	JV	Joint Venture,Junior Varsity
1974	JW	Jehovah's Witnesses
1975	JWARS	Joint Warfare System (simulation)
1976	JWP	Joint Warfare Publication
1977	JY	Japanese Yen
1978	JZ	Joint Zone
1979	K	Kelvin,Potassium (Latin Kalium),Tanker (aircraft designation code)
1980	k	Kilo-
1981	K	picokelvin
1982	K9	Canine Police Unit
1983	Ka	Kamov Design Bureau
1984	kA	Kiloampere
1985	KA	Knowledge Acquisition,Karnataka (Indian state code)
1986	KAF	Kandahar Air Field
1987	KANUKOKA	Kalaallit Nunaanni Kommunit Kattuffiannit (Kalaallisut, Greenlandic Communities Association
1988	KARNAC	Knowledge Aided Retrieval in Activity Context
1989	KARR	Knight Automated Roving Robot (Knight Rider character)
1990	KATUSA	Korean Augmentation To United States Army
1991	KAZ	Kazakhstan (ISO 3166 trigram)
1992	KBE	Knight Commander of the Order of the British Empire
1993	KBO	Kuiper Belt Object
1994	KBVB	Koninklijke Belgische Voetbalbond (Dutch for Royal Belgian Football Association)
1995	kC	Kilocoulomb
1996	KCK	Kansas City,Kansas,Koma Civakên Kurdistan (Kurdish, Union of Communities in Kurdistan)
1997	KCL	King's College London
1998	KCMO	Kansas City,Missouri (pronounced: K-C-Moe)
1999	KCS	Kansas City Southern Railway (AAR reporting mark)
2000	KD	Kawasaki Disease,Kraft Dinner
2001	KE	Kenya (FIPS 10-4 country code; ISO 3166 digram),Kinetic Energy,Knowledge Engineering
2002	KEDO	Korean Peninsula Energy Development Organization
2003	KEN	Kenya (ISO 3166 trigram)
2004	KERA	Kentucky Education Reform Act (of 1990)
2005	kerma	Kinetic Energy Released in MAterial / in MAtter / per unit MAss
2006	KESR	Kent and East Sussex Railway.
2007	KET	Kentucky Educational Television,Key English Test
2008	kF	Kilofarad
2009	KFC	Kentucky Fried Chicken
2010	KFOR	UN Kosovo Force
2011	KFUPM	King Fahd University of Petroleum & Minerals
2012	KG	Kyrgyzstan (FIPS 10-4 country code; ISO 3166 digram)
2013	KGO	Knight of the Guelphic Order of Hanover
2014	KGZ	Kyrgyzstan (ISO 3166 trigram)
2015	KH	Cambodia (ISO 3166 digram)
2016	kH	Kilohenry
2017	KHL	Kontinental Hockey League
2018	KHM	Cambodia (ISO 3166 trigram)
2019	KHz	Kilohertz
2020	Ki	Kibi
2021	KI	Kiribati (ISO 3166 digram)
2022	KIA	Killed In Action
2023	KIDS	Knowledge-based Integrated Design System
2024	KIR	Kiribati (ISO 3166 trigram)
2025	KISS	Keep It Simple,Stupid / Keep It Short and Simple,Korean Intelligence Support System
2026	KIT	Keep In Touch
2027	KITECH	Korean Institute of Industrial Technology
2028	KITT	Knight Industries Two Thousand, Knight Industries Three Thousand
2029	kJ	Kilojoule
2030	kK	Kilokelvin
2031	KKK	Ku Klux Klan
2032	kL	Kilolitre
2033	KLENOT	KLEť Observatory Near Earth and Other unusual objects observations Team and Telescope
2034	KLOC	Kilo Lines Of Code
2035	KM	Comoros,Knowledge Management
2036	kN	Kilonewton
2037	KNA	Saint Kitts and Nevis (ISO 3166 trigram)
2038	KNVB	Koninklijke Nederlandse Voetbal Bond (Dutch for Royal Dutch Football Association)
2039	KO	Knocked Out
2040	KOR	Republic of Korea (ISO 3166 trigram)
2041	KP	Kim Possible
2042	KPMG	Klynveld,Peat,Marwick,Goerdeler
2043	KPNO	Kitt Peak National Observatory
2044	KQ	Kenya Airways (IATA airline designator), Kingman Reef (FIPS 10-4 territory code)
2045	KR	Kiribati (FIPS 10-4 country code), Republic of Korea (ISO 3166 digram)
2046	Kr	Krypton
2047	KS	Kansas (postal symbol), Republic of Korea (FIPS 10-4 country code)
2048	kS	Kilosiemens
2049	KSC	Kennedy Space Center
2050	KSI	Killed or Seriously Injured
2051	KSU	Kansas State University
2052	KT	Christmas Island (FIPS 10-4 territory code), Knight of the Order of the Thistle, Knights Templar
2053	kT	Kilotesla
2054	KTS	Knight of the Tower and Sword (of Portugal)
2055	KU	Kuwait (FIPS 10-4 country code)
2056	KUW	Kuwait (UNDP country code,IOC and FIFA trigram,but not ISO 3166)
2057	kV	Kilovolt
2058	KV	Kosovo
2059	kW	Kilowatt
2060	KW	Kuwait (ISO 3166 digram)
2061	KWB	Kids' WB!
2062	KWT	Kuwait (ISO 3166 trigram)
2063	KX	Cayman Airways (IATA airline designator)
2064	KY	Cayman Islands (ISO 3166 digram), Kentucky (postal symbol)
2065	KZ	Kazakhstan (FIPS 10-4 country code; ISO 3166 digram)
2066	KZN	KwaZulu-Natal
2067	La	Lanthanum
2068	LA	Laos (FIPS 10-4 country code; ISO 3166 digram), Louisiana (postal symbol), Los Angeles
2069	LAAS	Local Area Augmentation System, Los Angeles Astronomical Society
2070	LAB	Logistics Assault Base
2071	LabVIEW	Laboratory Virtual Instrumentation Engineering Workbench
2072	LACMA	Los Angeles County Museum of Art
2073	LAD	Laser Aiming Device
2074	LADW	Local Air Defence Warning
2075	LAESI	Local Authority & Emergency Service Information
2076	LAN	Local Area Network
2077	LANL	Los Alamos National Laboratory
2078	LAO	Laos (ISO 3166 trigram)
2079	LAR	Light Armoured Reconnaissance, Logistics Assistance Representative
2080	LARC	Livermore Advanced Research Computer (cf. LLNL)
2081	LARP	Live-Action Role-Playing
2082	Laser	Light Amplification by Stimulated Emission of Radiation (cf. Maser)
2083	LAT	Lowest Astronomical Tide (nautical charts),Licensed Athletic Trainer (used in many of the United States; see www.oata.org)
2084	LATA	Local Access Transport Area
2085	LATCH	Lower Anchors and Tethers for Children (U.S. standard for attachment points for child safety seats in passenger cars)
2086	LAV	Land Assault Vehicle, Light Armoured Vehicle, Lymphadenopathy-Associated Virus
2087	LAW	Light Antitank Weapon
2088	LAX	Los Angeles International Airport, The Latin American Xchange (professional wrestling)
2089	LB	Lebanon (ISO 3166 digram)
2090	LBH	Light Battlefield Helicopter, Lyman-Birge-Hopfield bands
2091	LBJ	Lady Bird Johnson,LeBron James,Light Bulb Joke,Little Beagle Johnson (the dog owned by Lyndon and Lady Bird Johnson),Lyndon Baines Johnson
2092	LBN	Lebanon (ISO 3166 trigram)
2093	LBNL	Lawrence Berkeley National Laboratory
2094	LBR	Liberia (ISO 3166 trigram)
2095	LBS	Location-Based Services
2096	LBT	Large Binocular Telescope
2097	LBW	Leg Before Wicket
2098	LBY	Libya (ISO 3166 trigram)
2099	LCA	Saint Lucia (ISO 3166 trigram)
2100	LCC	Land Component Commander
2101	LCCP	Light Contingency Communications Package
2102	LCD	Liquid Crystal Display
2103	LCM	Least/Lowest Common Multiple
2104	LCS	League of Legends Championship Series
2105	LDA	Lateral Drift Apparatus (paratroops)
2106	LDC	Lesser Developing/Developed Country
2107	LDL	Low-Density Lipoprotein
2108	LDV	Local Defence Volunteers (British Home Guard)
2109	LDW	Lane Departure Warning (ADAS)
2110	LE	Lebanon (FIPS 10-4 country code)
2111	LEC	Local Exchange Carrier
2112	LED	Light-Emitting Diode
2113	LEGAD	Legal Advice
2114	Legs	level emotion gad speed
2115	LEMOSS	Long-Endurance MObile Submarine Simulator
2116	LEN	Large Extension Node
2117	LEP	Large Electron-Positron collider
2118	LER	Loss-Exchange Ratio
2119	LEU	Low-Enriched Uranium
2120	LF	Low Frequency
2121	LFO	Low Frequency Oscillation / Oscillator
2122	LFTR	Liquid fluoride thorium reactor
2123	LG	Latvia (FIPS 10-4 country code)
2124	LGM	Little Green Men
2125	LGS	Landsat Ground Station
2126	LHC	Large Hadron Collider
2127	LHS	Left Hand Side
2128	Li	Lithium
2129	LIBOR	London Interbank Offered Rate
2130	LIBS	Laser Induced Breakdown Spectroscopy
2131	LIE	Liechtenstein (ISO 3166 trigram)
2132	LIGO	Laser Interferometer Gravitational-Wave Observatory
2133	LINEAR	Lincoln Near-Earth Asteroid Research
2134	LISA	Laser Interferometer Space Antenna
2135	LIVE	Liquid Inertial Vibration Eliminator
2136	LJJ	Lord Justices of Appeal
2137	LK	Sri Lanka (ISO 3166 digram)
2138	LKA	Sri Lanka (ISO 3166 trigram)
2139	LKR4	Linkwitz-Riley 4th order (audio crossover type)
2140	LLAD	Low Level Air Defence
2141	LLB	Legum Baccalaureus (Latin: Bachelor of Laws)
2142	LLC	Limited Liability Company
2143	LLLTV	Low-Light Level Television
2144	LLNL	Lawrence Livermore National Laboratory
2145	LLP	Limited Liability Partnership
2146	LLTR	Low-Level Transit Route
2147	LMAO	Laughing My Ass Off (Internet shorthand)
2148	LMB	Lick My Balls
2149	LMFAO	Laughing My F**king Ass Off (Internet shorthand,electro-hop duo)
2150	LMN	Lifetime Movie Network
2151	LMS	Like My Status (Internet shorthand)
2152	LMV	() Light Motor Vehicle
2153	LNER	London and North Eastern Railway
2154	LNG	Liquefied Natural Gas
2155	LNO	Liaison Officer
2156	LO	Slovakia (FIPS 10-4 country code)
2157	LOA	Limit Of Advance
2158	LOC	Level of Operational Capability,Limited Operational Capability,Lines Of Code,Lines Of Communication,see entry
2159	LoD	Lines of Development (UK)
2160	LOFAR	Low Frequency Analysis and Recording
2161	LOGPAC	Logistics Package
2162	LOL	Laughing Out Loud (Internet shorthand)
2163	LOMEZ	Low Altitude Missile Engagement Zone
2164	LONEOS	Lowell Observatory Near-Earth-Object Search
2165	LORTID	LOng Range Target IDentification
2166	LOS	Line Of Sight
2167	LOSAT	Line-Of-Sight Anti-Tank (missile)
2168	LOTA	Licentiate of the Orthodontic Technicians Association
2169	LOTIS	Livermore Optical Transient Imaging System
2170	LOTS	Logistics Over-The-Shore
2171	LPC	Linear Predictive Coding
2172	LPG	Liquefied Petroleum Gas (cf. LNG)
2173	LPI	Low Probability of Intercept
2174	LQ	Palmyra Atoll (FIPS 10-4 territory code)
2175	Lr	Lawrencium
2176	LR	Liberia (ISO 3166 digram)
2177	LRC	Logistics iness Center
2178	LRGW	Long-Range Guided Weapon
2179	LRICBM	Limited Range ICBM
2180	LRIP	Low Rate Initial Production
2181	LRP	Logistics Release Point
2182	LRPE	Long-Range Planning Element
2183	LRS	Long Range Surveillance
2184	LRU	Line-Replaceable Unit
2185	LSI	Large-Scale Integration
2186	LSIF	Labour Sponsored Investment Fund
2187	LSND	Liquid Scintillator Neutrino Detector
2188	LSO	Lesotho (ISO 3166 trigram)
2189	LSST	Large Synoptic Survey Telescope
2190	Lt	Lieutenant
2191	LtC	Lieutenant-Colonel (U.S.)
2192	LTC	Long-Term Costing
2193	Ltd	Limited
2194	LTDP	Long-Term Defence Plan
2195	LTI	Linear Time-Invariant
2196	LTM	Acronym for Laughing To Myself
2197	LTP	Long-Term Potentiation
2198	LTU	Lithuania (ISO 3166 trigram)
2199	LU	Acronym Love You
2200	LU	Loonatics Unleashed
2201	Lu	Lutetium
2202	LUCA	Last Universal Common Ancestor
2203	LUG	Linux User Group
2204	LULU	Locally Unwanted Land Use (urbanism)
2205	LUX	Luxembourg (ISO 3166 trigram)
2206	LVA	Latvia (ISO 3166 trigram)
2207	LVEF	Left Ventricular Ejection Fraction
2208	Lw	Lawrencium (obsolete 1963)
2209	LWR	Laser warning receiver
2210	LWRC	Land Warfare Resources Corporation
2211	LWS	Land Warrior System
2212	LX	Electrics (theatrical term)
2213	LYAO	Laugh Your Ass Off
2214	LYLAS	Love You Like A Sister
2215	Ma	Megaannum
2216	mA	Milliampere
2217	MAA	Mathematical Association of America
2218	MAAC	Metro Atlantic Athletic Conference
2219	MACE	Multi-Agent Computing Environment
2220	MACHO	MAssive Compact Halo Object
2221	MAF	Maintenance Action Form
2222	MAGIC	Major Atmospheric Gamma-ray Imaging Cherenkov (telescope)
2223	MAGNETAR	Metaprogrammable AGent NETwork ARchitecture
2224	MAGTF	Marine Air-Ground Task Force
2225	MALD	Miniature Air-Launched Decoy
2226	MANPADS	MAN-Portable Air Defence System
2227	MANPRINT	MANpower and PeRsonnel INTegration
2228	MAO	Molėtų astronomijos observatorija (Moletai Astronomical Observatory),MonoAmine Oxidase
2229	MAOI	Monoamine oxidase inhibitor
2230	MAPS	Monitoring Avian Productivity and Survivorship
2231	MAR	Morocco (ISO 3166 trigram)
2232	MarBEF	Marine Biodiversity and Ecosystem Functioning
2233	MARCENT	United States Marine Forces Central Command
2234	MARFORCC	Marine Force Component Commander
2235	MASAS	Monte Agliale Supernovae and Asteroid Survey
2236	Maser	Microwave Amplification by Stimulated Emission of Radiation
2237	MASH	Mobile Army Surgical Hospital
2238	MASINT	Measurement And Signature Intelligence
2239	MAVS	Mobile Artillery Vehicle System
2240	MBBL	(U.S. Armor Center) Mounted Battlespace Battle Laboratory
2241	MBCC	Migratory Bird Conservation Commission (U.S.)
2242	MBCS	Multi-Byte Character Set
2243	MBI	Moody Bible Institute
2244	MBIDST	Member of the British Institute of Dental and Surgical Technologists
2245	MBM	Meat and Bone Meal
2246	MBT	Main Battle Tank
2247	MBTI	Myers-Briggs Type Indicator
2248	mC	Millicoulomb
2249	MCDL	Model Composition Definition Language
2250	MCFT	Modified Compression Field Theory
2251	MCG	Melbourne Cricket Ground
2252	MCIS	Mellon Collie and the Infinite Sadness
2253	MCM	Mine Counter-Measures
2254	MCMV	Mine Counter-Measure Vessel
2255	MCR	My Chemical Romance
2256	MCSF	Marine Corps Security Forces
2257	MCT	Movement Control Team
2258	MCTIS	Mounted Co-operative Target Identification System
2259	Md	Mendelevium
2260	MDNA	Madonna's 12th studio album title (2012)
2261	MDO	Membership Driven Organisation
2262	MDP	Markov Decision Process
2263	MDT	Mountain Daylight Time (UTC-6 hours)
2264	MDV	Maldives (ISO 3166 trigram)
2265	Me	Messerschmitt
2266	MEAC	Mid-Eastern Athletic Conference (ME-ac)
2267	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)
2268	MEDEVAC	Medical evacuation
2269	MEDS	Mission Essential Data Set
2270	MEG	MagnetoEncephaloGraphy
2271	MELT	Metallic Line/Loop Test (ing)
2272	MEMS	Microelectromechanical System
2273	MER	Mars Exploration Rover
2274	MERL	Mitsubishi Electric Research Laboratories
2275	MES	Manufacturing Execution Systems
2276	METAR	[Meteorological] Aviation Routine weather report
2277	METOC	Meteorological and Oceanographic
2278	MeV	Megaelectronvolt
2279	MEX	Mexico (ISO 3166 trigram)
2280	MEZ	Missile Engagement Zone
2281	mF	Millifarad
2282	MGPAM	My Gym Partner's a Monkey
2283	MGS	Mobile Gun System
2284	mH	Millihenry
2285	MHC	Major Histocompatibility Complex
2286	MHHW	Mean Higher High Water (nautical charts)
2287	MHL	Marshall Islands (ISO 3166 trigram)
2288	MHLW	Mean Higher Low Water (nautical charts)
2289	MHRA	(UK) Medicines and Healthcare products Regulatory Agency
2290	MHW	Mean High Water (nautical charts)
2291	MHWN	Mean High Water Neaps (nautical charts)
2292	MHWS	Mean High Water Springs (nautical charts)
2293	MHz	Megahertz
2294	Mi	Mebi
2295	MIA	Missing In Action
2296	MICLIC	Mine Clearing Line Charge
2297	MICOM	Missile Command
2298	MID	Midway Islands (ISO 3166 trigram; obsolete 1986)
2299	MIDAS	Man-machine Integration Design and Analysis System
2300	MIDI	Musical Instrument Digital Interface
2301	MIDS	Multi-Function Information Distribution System
2302	MIFG	Shallow Fog (METAR Code)
2303	MIKE	Monitoring of Illegal Killing of Elephants
2304	MIL	Man-In-the-Loop
2305	MILC	Mirrorless interchangeable-lens camera
2306	MILF	Mother I'd Like to Fuck
2307	MIMOSA	MIcroMeasurements Of Satellite Acceleration
2308	MIMPT	Member of the Institute of Maxillofacial Prosthetists and Technologists
2309	MIRA	MILAN Infra-Red Acquisition (thermal sight)
2310	MIRV	Multiple Independent Reentry Vehicle
2311	MISREP	Mission Report
2312	MISSI	Multilevel Information System Security Initiative
2313	MITL	Man-In-The-Loop
2314	MITS	see entry
2315	mJ	Millijoule
2316	MJD	Modified Julian Day
2317	mK	Millikelvin
2318	MKG	Michael Kidd-Gilchrist (American basketball player)
2319	MKSA	Metre-Kilogram-Second-Ampere (system of units)
2320	mL	Millilitre
2321	MLB	Major League Baseball
2322	MLC	Member of the Legislative Council (in India)
2323	MLE	Maximum likelihood estimation
2324	MLHW	Mean Lower High Water (nautical charts)
2325	MLI	Mali (ISO 3166 trigram)
2326	MLL	Major League Lacrosse
2327	MLLW	Mean Lower Low Water (nautical charts)
2328	MLP	My Little Pony
2329	MLRS	Multiple-Launch Rocket System
2330	MLT	Malta (ISO 3166 trigram)
2331	MLW	Mean Low Water (nautical charts)
2332	MLWN	Mean Low Water Neaps (nautical charts)
2333	MLWS	Mean Low Water Springs (nautical charts)
2334	Mm	Megametre
2335	mm	Millimetre
2336	MMEV	Multi-Mission Effects Vehicle
2337	MMI	Magical MonkeyZ Inc.
2338	MMI	Man-Machine Interface
2339	MMI	McLean Meditation Institute
2340	MMIC	McLean Meditation Institute Certified
2341	MMO	Massively Multiplayer Online (computer game)
2342	MMOR	Master of Management in Operations Research
2343	MMORPG	Massively multiplayer online role-playing game
2344	MMPR	Mighty Morphin Power Rangers
2345	MMS	Multimission Modular Spacecraft
2346	Mn	Manganese
2347	mN	Millinewton
2348	MNB	Multinational Brigade
2349	MNE	Montenegro (ISO 3166 trigram)
2350	MNMF	Multi-National Maritime Force
2351	MNP	Northern Mariana Islands (ISO 3166 trigram)
2352	MNS	Mission Needs Statement
2353	Mo	Molybdenum
2354	MOA	Museum of Art (Brigham Young University)
2355	MOCAS	Mechanization Of Contract Administration Services
2356	MoD	Ministry of Defence (United Kingdom) and various other countries
2357	modem	Modulator-Demodulator
2358	Moe	Marvel of entertainment
2359	MOE	Measure Of Effectiveness
2360	MOF	Ministry of Finance (Japan)
2361	MOFA	Ministry of Foreign Affairs (Japan)
2362	MOID	Minimum Orbital Intersection Distance
2363	MOJWA	Movement for Oneness and Jihad in West Africa
2364	MOLO	Mobile Other Licensed Operator (UK)
2365	MOM	Master's Degree in Oriental medicine
2366	MOM	Message Oriented Middleware
2367	MoM	Multiple of the median
2368	MoMA	Museum of Modern Art (NYC)
2369	MOND	Modified Newtonian Dynamics
2370	MOO	Measure Of Outcome
2371	MOPP	Mission-Oriented Protective Posture
2372	MORP	Meteorite Observation and Recovery Project
2373	MOSFET	Metal-Oxide-Semiconductor Field-Effect Transistor
2374	MOT	Ministry of Transport (UK)
2375	MOTA	Member of the Orthodontic Technicians Association
2376	MOTESS	Moving Object and Transient Event Search System
2377	MOU	Memorandum Of Understanding
2378	MOW	Maintenance of way (also MW)
2379	MOZ	Mozambique (ISO 3166 trigram)
2380	MPa	Megapascal
2381	mPa	Millipascal
2382	MPAA	Motion Picture Association of America
2383	MPEC	Minor Planet Electronic Circular
2384	MPEG	Motion Pictures (Coding) Experts Group
2385	MPEV	Multi-Purpose Engineering Vehicle
2386	MPF	Maritime Prepositioning Force
2387	MPFC	Medial PreFrontal Cortex
2388	MPG	Miles Per Gallon
2389	MPMC	Medial PreMotor Cortex
2390	MPSI	Member of the Pharmaceutical Society of Ireland
2391	MPSoC	MultiProcessor System-on-Chip
2392	MPSRON	Maritime Propositioning Ship Squadron
2393	MR	Mauritania (FIPS 10-4 country code; ISO 3166 digram)
2394	MRAV	Multi-Role Armoured Vehicle
2395	MRBM	Medium Range Ballistic Missile
2396	MRC	Maintenance Requirements Card
2397	MRD	Motorized Rifle Division
2398	MRGW	Medium-Range Guided Weapon
2399	MRI	Magnetic Resonance Imaging
2400	MRL	Multiple Rocket Launcher
2401	MRPharmS	Member of the Royal Pharmaceutical Society (Great Britain)
2402	MRS	Magnetic Resonance Spectroscopy
2403	MRSA	Methicillin-resistant Staphylococcus aureus
2404	MRTFB	U.S. Major Range and Test Facility Base
2405	Ms	Megasecond
2406	mS	Millisiemens
2407	MSD	Minimum Safe Distance
2408	MSDB	Multi Source Data Base
2409	MSE	Multiple Subscriber Element
2410	MSG	Message
2411	MSLP	Mean Sea Level Pressure
2412	MSNBC	Microsoft National Broadcasting Company Cable news channel (see also msnbc.com)
2413	MSO	Multiple System Operator
2414	MSPB	Merit Systems Protection Board
2415	MSSA	Methicillin-susceptible Staphylococcus aureus
2416	Mt	Meitnerium
2417	mT	Millitesla
2418	MTBF	Mean time between failures
2419	MtF	Male-to-female transsexual
2420	MTG	Magic: The Gathering
2421	MTQ	Martinique (ISO 3166 trigram)
2422	MTT	Methylthiazol tetrazolium (assay)
2423	MTWS	MAGTF Tactical Warfare System
2424	MUS	Mauritius (ISO 3166 trigram)
2425	mV	Millivolt
2426	MVC	Missouri Valley Conference
2427	MVFC	Missouri Valley Football Conference
2428	MVNO	Mobile virtual network operator
2429	mW	Milliwatt
2430	MWESH	Machismo Wizards Extended SHelter (operating system)
2431	MWI	Malawi (ISO 3166 trigram)
2432	MWOA	Mount Wilson Observatory Association
2433	MWTB	Mounted Warfare Test Bed
2434	MY	Malaysia (FIPS 10-4 country code; ISO 3166 digram)
2435	MYOB	Mind Your Own Business
2436	MYS	Malaysia (ISO 3166 trigram)
2437	MYT	Mayotte (ISO 3166 trigram)
2438	n	Nano
2439	N3F	National Fantasy Fan Federation
2440	nA	Nanoampere
2441	Na	Sodium (Latin Natrium)
2442	NAA	N-Acetylaspartate
2443	NAAD	North American Air Defense
2444	NAAQS	National Ambient Air Quality Standards
2445	NAAWS	NATO Anti-Air Warfare System
2446	NAC	National Agency Check,U.S. Naval Avionics Center,U.S. Navy Advanced Concepts,North Atlantic Council,Northern Area Command
2447	NACC	North Atlantic Cooperation Council
2448	NACISA	NATO Communications and Information Systems Agency
2449	NACMA	NATO Air Command and Control System Management Agency
2450	NACRA	North America Caribbean Rugby Association (more specifically rugby union)
2451	NAEC	U.S. Naval Air Engineering Center
2452	NAFERA	Native American Free Exercise of Religion Act
2453	NAFLD	NonAlcoholic Fatty Liver Disease
2454	NAFO	Northwest Atlantic Fisheries Organization
2455	NAFTA	North American Free Trade Agreement
2456	NAGPRA	Native American Graves Protection and Repatriation Act
2457	NAICS	North American Industry Classification System
2458	NAIL	Neurotics Anonymous
2459	NAILS	National Airspace Integrated Logistics System
2460	NAIRU	Non Accelerating Inflation Rate of Unemployment
2461	NAK	Negative Acknowledge
2462	NAM	Namibia (ISO 3166 trigram)
2463	NAMBLA	North American Man-Boy Love Association
2464	NAMRL	Naval Aerospace Medical Research Laboratory
2465	NaN	Not A Number (computing)
2466	NAO	UK National Audit Office
2467	NAPS	Navy Acquisition Procedures Supplement
2468	NARA	(U.S.) National Archives and Records Administration
2469	NARAL	National Abortion Rights Action League
2470	NARDAC	Naval Regional Data Automation Center
2471	NARDIC	U.S. Navy Acquisition Research and Development Information Center
2472	NARPV	National Association for Remotely Piloted Vehicles
2473	NASCAR	National Association for Stock Car Auto Racing
2474	NASDAQ	National Association of Securities Dealers Automated Quotations
2475	NASED	National Association of State Election Directors [1][2]
2476	NASH	Non-Alcoholic Steatohepatitis
2477	NASP	National Aerospace Plane
2478	NASS	National Association of Secretaries of State [3]
2479	NatGeo	National Geographic
2480	NaUKMA	National University of Kyiv-Mohyla Academy
2481	NAV	Navigation[al]
2482	NAVCAMS	Naval Communications Area Master Station
2483	NAVCC	National Audio-Visual Conservation Center
2484	NAVCENT	Naval Forces U.S. Central Command
2485	NAVDAC	Naval Data Automation Command
2486	NAVEUR	Naval Forces U.S. European Command
2487	NAVFOR	Naval Force
2488	NAVMACS	Naval Modular Automatic Communication Subsystem
2489	NAVNET	Navy Network
2490	NAVS	Non-Cooperative Airborne Vector Scoring
2491	NAVSAT	Navigation Satellite
2492	NAVSPACECOM	U.S. Navy Space Command
2493	NAVSPASUR	U.S. Naval Space Surveillance System
2494	NAVSTAR	Navigation Satellite Timing And Ranging
2495	NAVTACNET	Navy Tactical Network
2496	NAWC	U.S. Naval Air Warfare Center
2497	Nb	Niobium
2498	NBA	National Basketball Association
2499	NBL	National Basketball League (Australia)
2500	NBT	Nitroblue tetrazolium (assay)
2501	nC	Nanocoulomb
2502	NCA	National Command Authority
2503	NCAR	U.S. National Center for Atmospheric Research
2504	NCB	National Codification Bureau
2505	NCCAM	U.S. National Center for Complementary and Alternative Medicine
2506	NCCUSL	National Conference of Commissioners on Uniform State Laws (U.S.)
2507	NCDDR	U.S. National Center for the Dissemination of Disability Research
2508	NCI	U.S. National Cancer Institute
2509	NCL	New Caledonia (ISO 3166 trigram)
2510	NCLR	National Council of La Raza
2511	NCMO	No Commitment Make Out
2512	NCO	Non-Commissioned Officer
2513	NCP	Net Contracted Purchases
2514	NCR	National Cash Register Co.
2515	NCTR	Non-Co-operative Target Recognition
2516	NCW	Network Centric Warfare
2517	Nd	Neodymium
2518	NDAA	U.S. National Defense Authorization Act
2519	NDBP	Non-Departmental Public Body (Scotland)
2520	NDP	New Democratic Party (Canada)
2521	NDS	Nintendo DS
2522	Ne	Neon
2523	NECTEC	National Electronics and Computer Technology Center (Thailand)
2524	NEMS	National Energy Modeling System (USDOE-EIA)
2525	NEPA	National Environmental Policy Act
2526	NER	Niger (ISO 3166 trigram)
2527	NERICA	New Rice for Africa
2528	NESP	NSA/CSS Enterprise Standards Program
2529	NET	National Educational Television
2530	NETCU	(UK) National Extremism Tactical Co-ordination Unit
2531	NETL	(US) National Energy Technology Laboratory
2532	NETWARS	Network Warfare Simulation
2533	NEX	Navy EXchange
2534	nF	Nanofarad
2535	NF	Norfolk Island (ISO 3166 digram)
2536	NFER	National Foundation for Educational Research
2537	NFG	No Fucking Good
2538	NFHS	National Federation of State High School Associations
2539	NFI	Not F****** Interested
2540	NFK	Norfolk Island (ISO 3166 trigram)
2541	Nfld	Newfoundland
2542	NFPA	National Fluid Power Association (United States)
2543	NFT	No Further Text
2544	NGATS	New Generation Army Targetry System
2545	NGH	Northern General Hospital
2546	NGO	non-governmental organization
2547	NGS	Naval Gunfire Support
2548	nH	Nanohenry
2549	NHANES	National Health and Nutrition Examination Survey
2550	NHB	New Hebrides (ISO 3166 trigram; obsolete 1980)
2551	NHB	No Holds Barred radio (Link)
2552	NHL	National Hockey League
2553	NHRA	National Hot Rod Association
2554	NHS	National Health Service (UK)
2555	Ni	Nickel
2556	NIAAA	U.S. National Institute on Alcohol Abuse and Alcoholism
2557	NIAG	NATO Industrial Advisory Group
2558	NIAID	National Institute of Allergies and Infectious Disease
2559	NIAMD	National Institute of Arthritis and Musculoskeletal Diseases
2560	NIB	New In Box (Internet auction/trading listings)
2561	NIBP	Non-invasive blood pressure monitor
2562	NicA	Nicotine Anonymous
2563	NICAP	National Investigations Committee on Aerial Phenomena
2564	NICE	UK. National Institute for Health and Clinical Excellence
2565	NICHD	National Institute of Child Health and Human Development [4]
2566	NICP	National Inventory Control Point
2567	NIDDK	National Institute of Diabetes and Digestive and Kidney Diseases
2568	NIDRR	National Institute on Disability Research and Rehabilitation
2569	NIEHS	National Institute of Environmental Health Sciences
2570	NIIN	National Item Identification Number
2571	NIMA	National Imagery and Mapping Agency (became NGA)
2572	NIMBY	Not In My Back Yard (See NOME)
2573	NIMG	Not In My Generation
2574	NIN	Nine Inch Nails (band)
2575	NIPR	National Institute of Polar Research (Japan)
2576	NIR	Northern Ireland (FIFA trigram; not eligible for an ISO 3166 or IOC trigram)
2577	NISAC	U.S. National Infrastructure Simulation and Analysis Center
2578	NISCAP	NSA Information System Certification and Accreditation Program
2579	NISER	National Institute of Science Education and Research
2580	NIST	National Institute of Standards and Technology
2581	NITFS	National Imagery Transmission Format Standard
2582	NIU	Niue (ISO 3166 trigram)
2583	nJ	Nanojoule
2584	NJ	New Jersey (postal symbol)
2585	NJHS	National Junior Honor Society
2586	NJPW	New Japan Pro Wrestling
2587	nK	Nanokelvin
2588	NKA	No Known Allergies
2589	nL	Nanolitre
2590	NLB	Non-Linear Battlefield
2591	NLD	Netherlands (ISO 3166 trigram)
2592	NLF	National Liberation Front (disambiguation)
2593	NLL	National Lacrosse League
2594	NLW	Non-Lethal Weapon
2595	nm	Nanometre
2596	NM	New Mexico (postal symbol)
2597	NMCI	Navy Marine Corps Intranet
2598	NMCS	Not Mission Capable Supply (SM&R code)
2599	NMD	U.S. National Missile Defense
2600	NMN	No middle name
2601	NMR	Nuclear Magnetic Resonance
2602	NMSG	NATO Modelling and Simulation Group
2603	nN	Nanonewton
2604	NNE	North North-East
2605	NNSA	U.S. National Nuclear Security Administration
2606	NNW	North North-West
2607	No	Nobelium
2608	NOAA	U.S. National Oceanic and Atmospheric Administration
2609	NOAF	Norwegian Air Force
2610	NOAO	National Optical Astronomy Observatory
2611	NOC	UK. National Oceanography Centre
2612	NODEF	NATO Oceanographic Data Exchange Format
2613	NOGI	New Orleans Grande Isle (award for diving)
2614	NOLF	Navy OutLying Field
2615	NOME	Not on Mars Either
2616	NOME	Not on Mars Either (see NIMBY)
2617	NOR	Norway (ISO 3166 trigram)
2618	NORELPREF	No religious preference
2619	NORTHAG	Northern Army Group
2620	NOSA	NATO OSI Security Architecture
2621	NOTAFLOF	No One Turned Away For Lack Of Funds
2622	NOW	National Organization for Women
2623	NP	Nepal (ISO 3166 and FIPS 10-4 country code digram)
2624	NPB	Nippon Professional Baseball
2625	NPCS	Non-Passenger Coaching stock (in Railways)
2626	NPD	Nationaldemokratische Partei Deutschlands (German)
2627	NPDI	New Product Development and Introduction
2628	NPG	Needline/Network Participation Group
2629	NPH	Normal Pressure Hydrocephalus
2630	NPO	nothing by mouth
2631	NPOV	Neutral Point Of View
2632	NQ	Dronning Maud Land (ISO 3166 digram; obsolete 1983)
2633	NR	Nauru (ISO 3166 and FIPS 10-4 country code digram)
2634	NRA	National Rifle Association
2635	NRAO	National Radio Astronomy Observatory
2636	NRDC	(U.S.) Natural Resources Defense Council
2637	NREL	U.S. National Renewable Energy Laboratory
2638	NRK	Norsk Rikskringkasting (Norwegian Broadcasting Corporation)
2639	NRMP	National Resident Matching Program (U.S. medicine)
2640	NRO	U.S. National Reconnaissance Office
2641	NRT	Near Real Time
2642	NRU	Nauru (ISO 3166 trigram)
2643	ns	Nanosecond
2644	nS	Nanosiemens
2645	NSABB	National Science Advisory Board for Biosecurity
2646	NSAID	Non-Steroidal Anti-Inflammatory Drug
2647	NSB	Norges Statsbaner (Norwegian State Railways)
2648	NSC	National Security Council
2649	NSDL	National Science Digital Library (US)
2650	NSG	National System for Geospatial-Intelligence
2651	NSN	National Stock Number
2652	NSNA	National Student Nurses' Association
2653	NSO	National Standardization Office (ABCA)
2654	NSS	(U.S.) Naval Simulation System
2655	NST	(UK) Nimrod Software Team
2656	NSTAC	National Security Telecommunications Advisory Committee
2657	NSW	New South Wales (postal symbol)
2658	nT	Nanotesla
2659	NTDS	Naval Tactical Data System
2660	NTP	Network Time Protocol
2661	NTR	Network Time Reference
2662	NTRA	National Thoroughbred Racing Association
2663	NTSB	National Transportation Safety Board
2664	NTV	Non-Tactical Vehicle
2665	NTY	(Internet Abbreviations:) Not Tested Yet; (Alternatively) No Thank You
2666	NTZ	Iraq-Saudi Arabia Neutral Zone (ISO 3166 trigram; obsolete 1993)
2667	NUTS	Nuclear Utilization Target Selection
2668	NUWC	U.S. Naval Undersea Warfare Center
2669	nV	Nanovolt
2670	NVEOL	Night Vision and Electro-Optics Laboratory
2671	NVG	Night Vision Goggles
2672	NVL	Night Vision Laboratory
2673	nW	Nanowatt
2674	NW	North-West
2675	NW	Nuclear Weapon
2676	NWA	National Wrestling Alliance
2677	NWF	National Wildlife Federation
2678	NWFZ	Nuclear-Weapon-Free Zone
2679	NWHN	U.S. National Women's Health Network
2680	nWo	New World Order (see article for explanation of idiosyncratic capitalization)
2681	NWOAHM	New Wave of American Heavy Metal
2682	NWOBHM	New Wave of British Heavy Metal (sometimes pronounced /n.ˈwɒbm/ as if it were an acronym)
2683	NWRA	National Wildlife Rehabilitators Association
2684	NWSL	National Women's Soccer League (U.S.)
2685	NWT	North-West Territories
2686	NXA	21st arcade game in the Pump It Up series
2687	NXD	Native XML
2688	NXE	New Xbox Experience
2689	NXG	New Cross Gate station
2690	NXL	National XBall League
2691	NXN	Nike Cross Nationals
2692	NY	New York (postal symbol)
2693	NYC	New York City
2694	NYHA	New York Heart Association
2695	NYO	National Youth Orchestra of Great Britain
2696	NYSE	New York Stock Exchange
2697	NZ	New Zealand (ISO 3166 and FIPS 10-4 country code digram)
2698	NZC	New Zealand Cricket
2699	NZL	New Zealand (ISO 3166 trigram)
2700	NzL	Noze looan (online/event listings)
2701	NZOSS	New Zealand Open Source Society
2702	NZRU	New Zealand Rugby Union
2703	OAC	On Approved Credit
2704	OAP	Old Age Pensioner (UK)
2705	OARSI	Osteoarthritis Research Society International
2706	OAS	Organization of American States
2707	OASIS	Ontario Agencies Supporting Individuals with Special Needs
2708	OASIS	Ontario Association of Sewage Industry Services
2709	OASP	Operational Analysis Support Paper/Plan
2710	OAU	Organization for African Unity
2711	OBE	Officer of the Order of the British Empire
2712	OBX	Outer Banks (North Carolina)
2713	OC	Officer Commanding
2714	OCD	Obsessive-Compulsive Disorder
2715	OCFS	Oracle Cluster File System
2716	OCFS2	Oracle Cluster File System Release 2
2717	OCMCC	[2] Orchard County MCC
2718	OCN	Oncology Certified Nurse
2719	OCO	Oort Cloud Object
2720	OCR	Optical Character Recognition
2721	OCS	see entry
2722	ODAS	OCA-DLR Asteroid Survey
2723	ODBC	Open DataBase Connectivity
2724	OEA	(U.S.) Office of Economic Adjustment
2725	OECD	Organisation for Economic Co-operation and Development (international)
2726	OED	Oxford English Dictionary
2727	OEG	Operation Exposure Guidance
2728	OEIS	On-Line Encyclopedia of Integer Sequences
2729	OEM	Original Equipment Manufacturer
2730	OFA	Occipital Face Area
2731	OFDA	U.S Agency for International Development's Office of Foreign Disaster Assistance
2732	OGC	Open Geospatial Consortium
2733	OGD	Other Government Department
2734	OGO	Other Government Organization
2735	OH	Ohio (postal symbol)
2736	OHC	OverHead-Cam engine
2737	OHHLA	Original Hip-Hop Lyrics Archive
2738	OHIP	Ontario Health Insurance Plan
2739	OHMS	On Her (or His) Majesty's Service (also written: O.H.M.S.)
2740	OHP	Observatoire de Haute-Provence
2741	OHSS	Ovarian Hyperstimulation Syndrome
2742	OIC	Officer In Charge
2743	OIF	Operation Iraqi Freedom
2744	OIOC	Oriental & India Office Collections (in the British Library)
2745	OJT	On-the-Job Training
2746	OKC	Oklahoma City
2747	OLED	Organic Light-Emitting Diode
2748	OLS	Operational Linescan System
2749	OMD	Orchestral Manoeuvres in the Dark (1980s pop group)
2750	OME	Osaka Mercantile Exchange
2751	OMFG	Oh My Fucking God
2752	OMG	Oh My God or Or My Gosh
2753	OMGW	Oh My Gosh it's Windy
2754	OMN	Oman (ISO 3166 trigram)
2755	OMNCS	U.S. Office of the Manager for the National Communications System
2756	OMP	Order of Mapungubwe in Platinum
2757	OMS	Order of Mapungubwe in Silver
2758	OMT	Object Model Template
2759	ON	Ontario (postal symbol)
2760	ONC	Orthopaedic Nurse Certified
2761	ONG	Orthodontic National Group
2762	ONI	(U.S.) Office of Naval Intelligence
2763	ONS	Operational Needs Statement
2764	OOAD	Object Oriented Analysis and Design
2765	OOBE	Out-of-body experience
2766	OOCL	Orient Overseas Container Line
2767	OODA	Observation,Orientation,Decision,Action loop (a.k.a. Boyd's Loop)
2768	OOF	Out of Facility
2769	OOMF	One Of My Followers
2770	OOO	Out Of the Office
2771	OOTW	Operations Other Than War
2772	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
2773	OPAC	Online Public Access Catalogue
2774	OPCON	Operational control
2775	OPCW	Organisation for the Prohibition of Chemical Weapons
2776	OPEC	Organization of the Petroleum Exporting Countries
2777	OPFOR	Opposing force
2778	OPINTEL	Operational Intelligence
2779	OPLAN	Operation plan (also OpPlan)
2780	OPORD	Operation order
2781	OPSEC	Operations security,Open Platform for Security
2782	OPSI	Overwhelming post splenectomy infection,UK Office of Public Sector Information
2783	OPTAR	Operational target
2784	OPV	Offshore Patrol Vessel
2785	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)
2786	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
2787	ORAU	Oak Ridge Associated Universities
2788	ORB	Object Request Broker
2789	ORBAT	Order of Battle
2790	ORD	Office of Research and Development,Operational Requirements Document
2791	ORF	Operational iness Float
2792	ORISE	Oak Ridge Institute for Science and Education
2793	ORNL	Oak Ridge National Laboratory
2794	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
2795	ORSA	Oxacillin-resistant Staphylococcus aureus,Operations Research Society of America
2796	OS	Operating System
2797	Os	Osmium
2798	OSA	Order of St. Augustine
2799	OSCE	Organisation for Security and Cooperation in Europe
2800	OSD	U.S. Office of the Secretary of Defense,On-screen Display
2801	OSDL	Open Source Development Labs
2802	OSE	Own Separate Entrance
2803	OSERS	U.S. Department of Education Office of Special Education and Rehabilitative Services
2804	OSETI	Optical SETI also Optical SETI
2805	OSHA	Occupational Safety and Health Administration
2806	OSI	Office of Strategic Influence,Ontario Swine Improvement,Open Source Initiative,Open Systems Interconnection
2807	OSIA	(U.S.) On-Site Inspection Agency
2808	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)
2809	OSL	Open Source License, Optically Stimulated Luminescence, Orbiting Solar Laboratory
2810	OSM	One Saturday Morning
2811	OSOTPBOIAS	One Sec,On The Phone,Be Off In A Sec
2812	OSPA	Operations Security Professional's Association site of OSPA
2813	OSPA	Oregon School Psychologists Association [3]
2814	OSRH	Oružane Snage Republike Hrvatske (en: Armed forces of the Republic of Croatia)
2815	OSU	Ohio State University,Oklahoma State University
2816	OTA	Office of Technology Assessment, Orthodontic Technicians Association
2817	OTAC	Orthodontic Technicians Association Conference,Orthodontic Technicians Association Council
2818	OTC	Over-The-Counter (drugs)
2819	OTD	Off the derech (referring to an Orthodox Jew who has stopped practicing the tenets of his or her faith)
2820	OTEA	(U.S. Army) Operational Test Evaluation Agency
2821	OTI	Office of Transition Initiatives (United States Agency for International Development)
2822	OTOH	On The Other Hand
2823	OTS	Off the scale,sexually untouchable except for a lot of money
2824	OTSBH	Over The Shoulder Boulder Holder
2825	OTW	On The Way
2826	OTYBL	Over To You Blue Leader
2827	OTYRL	Over To You Red Leader
2828	OU	University of Oklahoma
2829	OW	Old Wykehamist
2830	OWN	Oprah Winfrey Network
2831	OX	IATA code for Orient Thai Airlines
2832	OXC	Optical cross-connect
2833	OXM	Official Xbox Magazine
2834	OXT	Oxytocin
2835	OZ	(?) Australia
2836	p	pico
2837	P2P	Peer-to-peer (networking)
2838	pA	picoampere
2839	PAA	Position Area for Artillery
2840	PABX	Private Automated Branch eXchange (company phone system)
2841	PACOM	(U.S.) Pacific Command
2842	PADI	Professional Association of Diving Instructors
2843	PAEK	PolyArylEtherKetone
2844	PAFC	Plymouth Argyle Football Club
2845	PAH	Polycyclic aromatic hydrocarbon
2846	PAHO	Pan American Health Organization
2847	PAK	Pakistan (ISO 3166 trigram)
2848	PAM	Precision Attack Missile
2849	PANS	Pretty Advanced/Awesome Network Services (cf. POTS)
2850	PARC	Palo Alto Research Center
2851	PAROS	Prevention of an Arms Race in Outer Space (treaty)
2852	PARP	(NATO Partnership for Peace) Planning And Review Process
2853	PARWIG	Power Augmented Ram Wing In Ground (aeroplane wing shape)
2854	PAS	See entry
2855	PASR	Personnel Accounting and Strength Reporting
2856	PATH	Port Authority Trans-Hudson
2857	PAYD	Pay As You Drive
2858	PAYE	Pay As You Earn
2859	Pb	Lead (Latin Plumbum)
2860	PB	PolyButylene
2861	PBB	PolyBrominated Biphenyl
2862	PBCK	Problem Between Chair and Keyboard (computer help desk in-joke)
2863	PBD	PolyButaDiene
2864	PBDE	PolyBrominated Diphenyl Ether
2865	PBI	PolyBenzImidazole
2866	PBN	PolyButylene Naphthalate
2867	PBOH	Please Become Old History
2868	PBT	PolyButylene Terephthalate
2869	PBX	Private Branch eXchange (company phone system)
2870	pC	picocoulomb
2871	PCAS	Planet-Crossing Asteroid Survey
2872	PCB	see entry
2873	PCCB	Porsche Ceramic Composite Brake
2874	PCCIP	President's Commission on Critical Infrastructure Protection
2875	PCE	PerChlorEthylene
2876	PCIe	Peripheral Component Interconnect Express (computer bus)
2877	PCL	Passive Coherent Location
2878	PCMCIA	Personal Computer Memory Card International Association (People Can't Memorise Computer-Industry Acronyms)
2879	PCN	Pitcairn Islands (ISO 3166 trigram)
2880	PCPI	Physician Consortium for Performance Improvement (AMA)
2881	PCR	Polymerase chain reaction
2882	PCSSD	Pulaski County Special School District
2883	PCZ	Panama Canal Zone (ISO 3166 trigram; obsolete 1980)
2884	Pd	Palladium
2885	PD	Product Director—Example: CERDEC Product Director C4ISR and Network Modernization
2886	PDL	Pure Dumb Luck (Texan punk band)
2887	PDN	Pull-Down Network
2888	PDRY	People's Democratic Republic of Yemen (obsolete since 1990)
2889	PDT	Pacific Daylight [Saving] Time (UTC-7 hours)
2890	PE	Professional Engineer
2891	PEBCAC	Problem Exists Between Chair and Computer (IT help desk in-joke)
2892	PEBKAC	Problem Exists Between Keyboard and Chair (ditto)
2893	PEEK	PolyEtherEtherKetone
2894	PEET	Partnerships for Enhancing Expertise in Taxonomy
2895	PEK	PolyEtherKetone
2896	PEPFAR	President's Emergency Plan For AIDS Relief
2897	PER	Peru (ISO 3166 trigram)
2898	perl	usually lower case Practical Extraction and Report Language
2899	PES	PolyEtherSulfone
2900	PEST	UK Public Engagement with Science and Technology
2901	PETE	PolyEthyleneTErephthalate
2902	PETP	PolyEthyleneTerePhthalate
2903	pF	picofarad
2904	PFD	Permanent Fund Dividend = personal flotation device
2905	PFE	Permanent Forest Estate
2906	PfP	Partnership for Peace
2907	Pg	petagram
2908	pg	picogram
2909	PGCE	Postgraduate Certificate in Education
2910	PGD	Pre-implantation Genetic Diagnosis
2911	PGENI	Pharmaco-Genetics for Every Nation Initiative
2912	PGH	Pre-implantation Genetic Haplotyping
2913	PGM	Precision-Guided Munition
2914	PGP	Pretty Good Privacy
2915	PHL	Philippines (ISO 3166 trigram)
2916	PHQ	Patient Health Questionnaire
2917	Pi	Pebi
2918	PIB	PolyIsoButylene
2919	PIC	Person In Charge
2920	PICNIC	Problem In Chair Not In Computer
2921	PICS	Private Investment Capital Subscription
2922	PIF	Partners in Flight
2923	PIG	Pipeline Inspection Gauge
2924	PIN	Personal Identification Number
2925	PINF	People In Need Foundation (Czech charitable organisation)
2926	PIPA	Program on International Policy Attitudes
2927	PIR	Priority Intelligence Requirement
2928	PIRA	Provisional Irish Republican Army
2929	PIREPS	Pilot Reports
2930	PITA	Pain In The Ass
2931	PJ	petajoule
2932	pJ	picojoule
2933	PJHQ	Permanent Joint Headquarters
2934	PKE	Partnership of Kindermusik Educators [1] &[2] & [2]
2935	PKI	Public Key Infrastructure (cryptography)
2936	PKU	Phenylketonuria
2937	pL	picolitre
2938	PLAID	Precision Location and Identification
2939	PLB	Personal Locator Beacon
2940	PLC	Public Limited Company (British)
2941	PLCC	Plastic Leaded Chip Carrier (electronics)
2942	PLD	Probable Line of Deployment
2943	PLEBS	People Lacking Everyday Basic Skills
2944	PLF	Parachute Landing Fall
2945	PLIF	Planar Laser-Induced Fluorescence
2946	PLL	Phase-Locked Loop (electronics)
2947	PLM	Polarized Light Microscope/Microscopy
2948	PLMBA	Phospholipid Bilayer Microarray
2949	Pln	Platoon
2950	PLO	Palestine Liberation Organization
2951	PLOKTA	Press Lots Of Keys To Abort
2952	PLP	Platonic Life Partner
2953	PLUTO	Pipe Line Under The Ocean
2954	PLW	Palau (ISO 3166 trigram)
2955	pm	picometre
2956	PMC	Primary Motor Cortex
2957	PMI	Positive Material Identification
2958	PMID	PubMed Identifier
2959	PMMA	PolyMethylMethAcrylate
2960	PMS	Premenstrual Syndrome
2961	PMSL	Piss Myself Laughing (Internet shorthand)
2962	PMT	Premenstrual Tension (UK) (see Premenstrual Syndrome)
2963	pN	piconewton
2964	PNAC	Project for the New American Century
2965	PNVS	Pilot Night Vision Sensor
2966	Po	Polonium
2967	PO	Post Office
2968	PO	Purchase Order
2969	POCD	Post-Operative Cognitive Dysfunction
2970	pod	Plain Old Documentation
2971	POFF	Plain Old Flat File
2972	POGO	Project On Government Oversight
2973	POI	Program Of Instruction
2974	POK	Plane Of Knowledge
2975	POLAD	Political Advice
2976	POMDP	Partially observable Markov decision process
2977	PooS	Poo Sniffer (Internet shorthand)
2978	POS- Point Of Sale terminal (retail industry transaction computers)	Piece Of S**t
2979	POSH	Port Outbound Starboard Home (alleged)
2980	POSSLQ	Person of the Opposite Sex Sharing Living Quarters
2981	POT	Plane Of Tranquility
2982	POTS	Plain Old Telephone Service (cf. PANS),Postural Orthostatic Tachycardia Syndrome
2983	POTUS	President of the United States
2984	POV	Point of view
2985	POW	Prisoner of war
2986	PPASC	(U.S.) Plans and Program Analysis Support Center
2987	PPCLI	Princess Patricia's Canadian Light Infantry (regiment)
2988	PPLI	Precise Participant Location & Identification
2989	PPM	Project Planning and Management
2990	PPO	PolyPhenylene Oxide
2991	PPQN	Pulses Per Quarter Note (ditto)
2992	PPQT	Pre-Production Qualification Test
2993	PPV	Pay-per-view
2994	Pr	Pastor, Priest
2995	PR	Public Relations
2996	Prb	Presbyter
2997	PRBO	Point Reyes Bird Observatory
2998	PRC	People's Republic of China
2999	PRD	CERDEC Product Realization Directorate
3000	PRFG	Partial Fog (METAR Code)
3001	PRI	Puerto Rico (ISO 3166 trigram)
3002	PRK	Democratic People's Republic of Korea (ISO 3166 trigram)
3003	PRM	Personnel iness Management
3004	PRY	Paraguay (ISO 3166 trigram)
3005	Ps	petasecond
3006	pS	picosiemens
3007	PSG	Pacific Seabird Group
3008	PSI	Portable Source Initiative
3009	PSI	Pounds per square inch
3010	PSS	Personnel System Support
3011	PST	Pacific Standard Time (UTC-8 hours)
3012	PSU	Pennsylvania State University
3013	PsyOp	Psychological Operations
3014	pT	picotesla
3015	Pt	Platinum
3016	PTA	Parent-Teacher Association
3017	PTAL	Public Transport Accessibility Level
3018	PTES	People's Trust for Endangered Species
3019	PTFE	PolyTetraFluoroEthylene
3020	PTI	Pardon the Interruption
3021	PTSD	Post-Traumatic Stress Disorder
3022	Pu	Plutonium
3023	Pub	Publication
3024	PUG	PET Users Group
3025	PUN	Pull-Up Network
3026	PUP	Pull-Up Point
3027	PUS	United States Miscellaneous Pacific Islands (ISO 3166 trigram; obsolete 1986)
3028	PV	petavolt
3029	pV	picovolt
3030	PvE	Player versus Environment
3031	PvP	Player versus Player
3032	PVR	Personal Video Recorder
3033	PvZ	Plants vs. Zombies
3034	PW	Palau (postal symbol; ISO 3166 digram)
3035	pW	picowatt
3036	PWA	Pirates With Attitude
3037	PWBA	Pension and Welfare Benefits Administration
3038	PWC	PieceWise Constant (describing a mathematical function)
3039	PwC	PricewaterhouseCoopers (international accounting firm)
3040	PWL	PieceWise Linear (describing a mathematical function)
3041	PWLC	PieceWise Linear and Concave/Convex (describing a mathematical function)
3042	PWR	Pressurized Water Reactor
3043	PX	Post eXchange
3044	PYF	French Polynesia (ISO 3166 trigram)
3045	PYMWYMI	Put Your Money Where Your Mouth Is
3046	Q1	First Quarter
3047	Q2	Second Quarter
3048	Q3	Third Quarter
3049	Q4	Fourth Quarter
3050	QA	Qatar (FIPS 10-4 country code; ISO 3166 digram)
3051	Qantas	Queensland And Northern Territory Aerial Services
3052	QAT	Qatar (ISO 3166 trigram)
3053	QB	Quarterback (football)
3054	QCD	Quantum ChromoDynamics
3055	QDR	Quadrennial Defense Review
3056	QEH	Queen Elizabeth's Hospital
3057	QK	Air Canada Jazz (IATA airline designator)
3058	QNH	Regional mean sea level atmospheric pressure (aeronautical Q code)
3059	QPS	Quark Publishing System
3060	QSCAT	Quick Scatterometer satellite
3061	QSL	Québec Sign Language
3062	QSO	Quasi-Stellar Object
3063	Quango	(British Commonwealth) QUasi Autonomous Non-Governmental Organisation
3064	Quasar	Quasi-stellar radio source
3065	QUB	Queen's University Belfast
3066	QUIET	Q and U Imaging ExperimenT (Q and U are the Stokes parameters of the CMBR polarization)
3067	QZ	Awair (IATA airline designator)
3068	R2I	Resistance to Interrogation
3069	RA	Radio Australia
3070	Ra	Radium
3071	RAAF	Royal Australian Air Force
3072	Rabobank	Raiffeisen-Boerenleenbank (from the two banks that merged to form the modern company)
3073	RACK	Risk Aware Consensual Kink (SM phrase)
3074	Racon	RAdar beaCON
3075	RADA	Royal Academy of Dramatic Art
3076	Radar	Radio Detection And Ranging
3077	RadB	Rad51/Dmc1 homologous protein
3078	RADb	Routing Assets Data Base
3079	RADC	Region Air Defence Commander
3080	RAE	UK Royal Aircraft Establishment (-1991)
3081	RAGBRAI	Register's Annual Great Bicycle Ride Across Iowa
3082	RAM	Royal Air Maroc
3083	Ramark	RAdar MARKer
3084	RAOC	Rear Area Operation Centre
3085	RARDE	UK Royal Armament Research and Development Establishment (1962-1991)
3086	RARE	Rapid Acquisition with Relaxation Enhancement (MRI technique)
3087	RATELO	Radiotelephone Operator
3088	Rb	Rubidium
3089	RB	Running Back (football)
3090	RBI	Runs Batted In
3091	RC	see entry
3092	RCAF	Royal Canadian Air Force
3093	RCC	Rescue Co-ordination Centre
3094	RCCO	Royal Canadian College of Organists
3095	RCHA	Royal Canadian Horse Artillery (regiment)
3096	RCMP	Royal Canadian Mounted Police
3097	RD	Radio Disney
3098	RDD	Radiological Dispersion Device
3099	RDM	Remotely Delivered/Deliverable Mine
3100	RDT	Remote Digital Terminal
3101	RDV	Remote Detection Vehicle
3102	Re	Rhenium
3103	RE	Royal Engineers
3104	REACT	Remote Electronically Activated Control Technology
3105	REAM	Retired Educators Association of Minnesota
3106	RECCE	Reconnaissance
3107	REEF	Reef Environmental Education Foundation
3108	REM	Rapid Eye Movement (sleep phase),Rosicrucian Egyptian Museum
3109	REME	Royal Electrical and Mechanical Engineers
3110	RERC	Rehabilitation Engineering Research Center
3111	RESNA	Rehabilitation Engineering and Assistive Technology Society of North America
3112	REU	Réunion (ISO 3166 trigram)
3113	Rf	Rutherfordium
3114	RFD	Request for Documentation
3115	RFE	Request for Evaluation
3116	RFEF	Real Federación Española de Fútbol (Spanish for Royal Spanish Football Federation)
3117	RFF	Right of First Refusal (legal term)
3118	RFID	Radio Frequency IDentification
3119	RFL	Rugby Football League
3120	RFP	Request for Proposal
3121	RFQ	Request for Quotation
3122	RFT	Request for Tender
3123	RFU	Rugby Football Union
3124	RG	Republican Guard
3125	Rg	Roentgenium
3126	RGB	Red Green Blue (colour model)
3127	RGBI	Red Green Blue Intensity (ditto)
3128	Rh	Rhodium
3129	RH	Southern Rhodesia (ISO 3166 digram; obsolete 1980)
3130	RHIC	Relativistic Heavy Ion Collider
3131	RHLI	Royal Hamilton Light Infantry (Canadian militia regiment)
3132	RHO	Southern Rhodesia (ISO 3166 trigram; obsolete 1980)
3133	RHU	Replacement Holding Unit
3134	RI	Rhode Island (postal symbol)
3135	RIAA	Recording Industry Association of America
3136	RIBA	Royal Institute of British Architects
3137	RIFA	Red imported fire ant
3138	RILA	Retail Industry Leaders Association
3139	RIMVS	Retinal Imaging Machine Vision System
3140	RINO	Republican In Name Only[1]
3141	RISC	Reduced Instruction Set Computer
3142	RJD	Reduced Julian Day
3143	RKBA	Right to Keep and Bear Arms (Second Amendment to the United States Constitution)
3144	RKO	Radio-Keith-Orpheum Pictures
3145	RLP	Recognised [Operating/Operational] Land Picture
3146	RLS	Restless Leg Syndrome
3147	RLY	Rally Point
3148	RM	see separate disambiguation page
3149	RMC	Robert Menzies College
3150	RMDA	Records Management and Declassification Agency
3151	RMP	Recognised [Operating/Operational] Maritime Picture
3152	RN	Radio Netherlands
3153	Rn	Radon
3154	RNA	RiboNucleic Acid
3155	RNAD	Royal Naval Armaments Depot (UK)
3156	RNPS	Radio Network Planning System
3157	RNZ	Radio New Zealand
3158	RNZI	Radio New Zealand International
3159	ROA	Rate Of Ascent
3160	ROE	Rules Of Engagement
3161	ROFLOL	Rolling On the Floor Laughing Out Loud
3162	ROH	Ring of Honor
3163	ROK	Republic of Korea
3164	ROP	Render Output Pipeline
3165	ROPE	Research Opportunity and Performance Evidence
3166	ROS	Reactive Oxygen Species
3167	ROU	Romania (ISO 3166 trigram)
3168	ROV	Remotely Operated Vehicle
3169	ROZ	Restricted Operations Zone
3170	RPA	Regional Plan Association
3171	RPD	Recognition-Primed Decision-making
3172	RPF	Rwandan Patriotic Front
3173	RPL	Reverse Polish Lisp
3174	rpm	revolutions per minute
3175	RPN	reverse Polish notation
3176	rps	revolutions per second
3177	RPV	Remotely Piloted Vehicle
3178	RQ	Puerto Rico (FIPS 10-4 territory code)
3179	RRB	Railroad Retirement Board
3180	RRN	Recurrence Rate Number
3181	RRP	Recurrent Respiratory Papillomatosis
3182	RRS	Racing Rules of Sailing
3183	RRSP	Registered Retirement Savings Plan (Canada; roughly equivalent to the IRA in the U.S.)
3184	RS	Russia (FIPS 10-4 country code)
3185	RSI	Repetitive Strain Injury
3186	RSJ	Rolled Steel Joist (construction)
3187	RSN	Real Soon Now (coined by author Jerry Pournelle)
3188	RSPB	(UK) Royal Society for the Protection of Birds
3189	RSPCA	Royal Society for the Prevention of Cruelty to Animals
3190	RSR	Required Supply Rate
3191	RSRE	UK Royal Signals and Radar Establishment (1976-1991)
3192	RSRI	Red Sands Research Institute
3193	RSS	Really Simple Syndication
3194	RTA	Road traffic accident (British)
3195	RTBF	Radio-Télévision belge de la Communauté française
3196	RTF	Rich Text Format
3197	RTFM	the Fucking/Fine Manual
3198	RTG	Radio-isotope Thermoelectric Generator also used for Rubber Tyred Gantry crane
3199	RTI	Run-Time Infrastructure (Simulation)
3200	RTL	see entry
3201	RTP	Real-time Transport Protocol
3202	RTS	see entry
3203	RTT	Round Trip Timing
3204	RU	Russia (ISO 3166 digram)
3205	Ru	Ruthenium
3206	RUC	Royal Ulster Constabulary
3207	RUS	Russia (ISO 3166 trigram)
3208	RUSI	Royal United Services Institute for Defence Studies
3209	RW	Rwanda (ISO 3166 and FIPS 10-4 country code digram)
3210	RWA	Rwanda (ISO 3166 trigram)
3211	RWH	Rain Water Harvesting
3212	RWR	Radar Warning Receiver
3213	RWS	Remote Weapon Station
3214	RX	Receive
3215	SBNO	Standing but not operating (in reference to amusement parks)
3216	SCOTUS	Supreme Court of the United States
3217	SCROTUS	So-called Ruler of the United States
3218	SDHC	Secure Digital High Capacity
3219	SDXC	Secure Digital eXtended Capacity
3220	SG	Senegal (FIPS 10-4 country code), Singapore (ISO 3166 digram), Snow Grains (METAR Code), Study Group
3221	SGOTUS	Second Gentleman of the United States
3222	SHO	Showtime (see also sho.com)
3223	SIRI	Service Interface for Real Time Information
3224	Siri	Speech Interpretation and Recognition Interface (Apple iOS software)
3225	SLOTUS	Second Lady of the United States (the vice president's wife)
3226	SoCon	Southern Conference (U.S. college sports)
3227	STB	Surface Transportation Board[2]
3228	SWAC	Southwestern Athletic Conference
3229	SWAN	System for Wearable Audio Navigation
3230	SWAT	Special Weapons And Tactics
3231	SWF	Single White Female
3232	Ta	Tantalum
3233	TAACOM	U.S. Theater Army Area Command
3234	TAADCOORD	Theatre Army Air Defence Co-ordinator
3235	TAAR	Trace Amine-Associated Receptor
3236	TAC	U.S. Tactical Air Command (1946-1992)
3237	TACAN	Tactical Air Navigation
3238	TACCO	Tactical Coordinator
3239	TACCSF	U.S. Theater Aerospace Command & Control Simulation Facility
3240	TACDAR	Tactical Detection And Reporting
3241	TACSOP	Tactical SOP (Standing Operating Procedure)
3242	TADIL	Tactical Digital Information Link
3243	TAI	Target[ed] Area of Interest
3244	TAJ	Tom and Jerry
3245	TAJT	Tom and Jerry Tales
3246	TALES	Technical Advice and Lexicon for Enabling Simulation
3247	TANJ	There Ain't No Justice (used as expletive in the Ringworld novels)
3248	TANP	Terrain-Aware Network Planner
3249	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)
3250	TAPPS	Texas Association of Private and Parochial Schools
3251	TARDIS	Time And Relative Dimension In Space (from Doctor Who)
3252	TAS	Tasmania (postal symbol)
3253	TASER	Thomas A. Swift's Electric Rifle
3254	TASM	Tactical Air-to-Surface Missile
3255	TAT	Tourism Authority of Thailand
3256	TATP	TriAcetone TriPeroxide
3257	TATT	Tired All The Time (medical diagnosis in-joke)
3258	Tb	Terbium
3259	TB	Tuberculosis
3260	TBA	to be announced
3261	TBBPA	TetraBromoBisPhenol-A
3262	TBD	to be done, or: to be documented, or: to be determined, or: to be decided
3263	TBF	to be fair
3264	TBH	To Be Honest
3265	TBL	Turkish Basketball League
3266	TBS	Turner Broadcasting System
3267	TBT	Tributyltin
3268	Tc	Technetium
3269	TCAA	Top Counter-Assault Agents
3270	TCAS	Traffic Collision Avoidance System
3271	TCCCS	Tactical Command,Control and Communication System
3272	TCD	Chad (ISO 3166 trigram)
3273	TCHD	Truck Cargo Heavy Duty
3274	TCL	Tool Command Language
3275	TCM	Turner Classic Movies
3276	TCU	Texas Christian University
3277	TCW	Tasty Coma Wife
3278	TCWMS	Tele-Center Workforce Management System
3279	TDA	The Disney Afternoon
3280	TDL	Tactical Data Link
3281	TDM	Time-Division Multiplexing
3282	TDMA	Time Division Multiple Access
3283	TDP	Technology Demonstration Programme
3284	TDRS	Tracking Data and Relay Satellite
3285	Te	Tellurium
3286	TEAL	Tasman Empire Airways Limited
3287	Team	Together everyone achieves more
3288	TEAMS	The East African Marine System (fiber optic cable)
3289	TED	Technology Entertainment Design prize
3290	TENCAP	Tactical Exploitation of National Capabilities
3291	TERS	Tactical Event Reporting System
3292	TES	Tactical Event System
3293	TEST	Thesaurus of Engineering and Scientific Terms
3294	TEU	Twenty-foot equivalent unit (cargo capacity)
3295	TeVeS	Tensor Vector Scalar theory
3296	TFMPP	Trifluorophenylmethylpiperazine
3297	TFR	Total Fertility Rate
3298	TFT	Thin-Film Transistor
3299	Tg	Teragram
3300	TG	Togo (ISO 3166 digram)
3301	TGO	Togo (ISO 3166 trigram)
3302	Th	Thorium
3303	THA	Thailand (ISO 3166 trigram)
3304	THAAD	Terminal High Altitude Area Defence
3305	THEGENTRY	The High-End Group of Earth's New Technologies Research Yield
3306	THEL	Tactical High Energy Laser ACTD
3307	THG	Tetrahydrogestrinone
3308	TIA	Total Information Awareness initiative
3309	TIA	Transient Ischemic Attack
3310	TIALD	Thermal Imaging and Airborne Laser Designation
3311	TIBS	Tactical Information Broadcast System
3312	TIC	Troops In Contact
3313	TIGERS	Topologically Integrated Geographic Encoding and Referencing System
3314	TINC	There Is No Cabal
3315	TIP	Thermal Identification Panel
3316	tits	Toes in the Sand
3317	TJD	Truncated Julian Day
3318	TJK	Tajikistan (ISO 3166 trigram)
3319	TKL	Tokelau (ISO 3166 trigram)
3320	TKM	Turkmenistan (ISO 3166 trigram)
3321	Tl	Thallium
3322	TLA	Three-Letter Abbreviation/Acronym
3323	TLAM	Tomahawk Land Attack Missile
3324	TLATOJL	The Life and Times of Juniper Lee
3325	TLPM	T1 Line Performance Monitor
3326	Tm	Terametre
3327	TMAP	Texas Medication Algorithm Project
3328	TMC	The Movie Channel
3329	TMD	Theatre Missile Defence
3330	TMDK	The Mighty Don't Kneel (Australian professional wrestling stable also active in Japan)
3331	TMI	Too Much Information
3332	TMJ	TemporoMandibular Joint (syndrome)
3333	TMNT	Teenage Mutant Ninja Turtles
3334	TMPG	Transparent Multi-Platform Gateway
3335	TMR	Twin Main Rotors (helicopter type)
3336	TMS	Transcranial Magnetic Stimulation
3337	TMT	Thirty Meter Telescope
3338	TMTOWTDI	There's Than One Way To Do It (from Perl)
3339	TNA	Total Nonstop Action Wrestling
3340	TNO	Trans-Neptunian Object
3341	TOBS	Time of OBServation
3342	TOC	Table Of Contents, Tactical Operations Centre, Temporo-Occipital transition Cortex, Top of Concrete
3343	TOG	Togo (IOC and FIFA trigram,but not ISO 3166)
3344	TOGS	Thermal Observation Gunnery Sight
3345	TOMS	Total Ozone Mapping Spectrometer (satellite instrument)
3346	TON	Tonga (ISO 3166 trigram)
3347	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
3348	TOT	Time On Target
3349	TOW	Tube-launched,Optically tracked,Wire-guided (anti-tank missile)
3350	TP	East Timor (ISO 3166 digram; obsolete 2002),São Tomé and Príncipe (FIPS 10-4 country code),Training Practice,Trident Ploughshares
3351	TPE	Chinese Taipei (IOC and FIFA trigram for the country also known as Taiwan)
3352	TPI	The point is
3353	TPO	Thrombopoietin
3354	TPS	The Pennington School
3355	TPTB	The Powers That Be (often used to refer to the people responsible for the content of TV series or movies)
3356	TQ	Top Qualifier (similar to Pole Position in car racing)
3357	TRA	Technology iness Assessment
3358	TRAC	(U.S. Army) TRADOC Analysis Center
3359	TRACON	Terminal Radar Approach Control
3360	TRADOC	(U.S. Army) Training and Doctrine Command
3361	TRANSCOM	U.S. Transportation Command
3362	TRAP	Tactical Receive equipment and related Applications
3363	TRASANA	TRADOC Systems Analysis Agency
3364	TRD	Towed Radar Decoy
3365	TRIGAT	Third Generation Antitank (missile)
3366	TRL	Technology readiness level
3367	Trp	Troop
3368	TRU	Transuranic
3369	TRUEX	Training in Urban Environment Exercise
3370	TRW	Thompson Ramo Wooldridge Inc.
3371	Ts	Terasecond
3372	TS	Terasiemens,Thunderstorm (METAR code),Tunisia (FIPS 10-4 country code),TinySex,Transsexual, Tough Sh*t
3373	TSA	Theatre Storage Area,Time Slot Allocation,Transportation Security Administration,The Salvation Army
3374	TSEC	Transmission Security Encryption Code
3375	TSL	Transportation Security Laboratory
3376	TSN	The Sporting News (historic name of the periodical now known as Sporting News),The Sports Network
3377	TSO	The Stationery Office (was HMSO until 1996),(U.S.) TRICARE Support Office,Trans-Siberian Orchestra (band)
3378	TSOP	Tactical Standing Operation Procedure,The Sound of Philadelphia (classic 1970s R&B instrumental)
3379	TSR	Terminate and Stay Resident
3380	TSSIA	The Subject Says It All
3381	TT	Teratesla,Terrestrial Time,Tourist Trophy (Motorcycle sport),Trinidad and Tobago (ISO 3166 digram)
3382	TTCT	Torrance Tests of Creative Thinking
3383	TTFN	Ta Ta For Now
3384	TTL	Tax,Title,License,Through-the-lens (photography),Time 'till live,Time to live,Transistor-transistor logic
3385	TTO	Trinidad and Tobago (ISO 3166 trigram)
3386	TTP	Tactics,Techniques,and Procedures,Thrombotic thrombocytopenic purpura,Trailer Transfer Point
3387	TTTEAF	Thomas the Tank Engine and Friends
3388	TTY	TeleTYpewriter (Printer)
3389	TTYL	To You Later (Internet slang)
3390	TTZ	Tetrazolium
3391	TU	Technische Universität (German for 'Technical University'),Thammasat University (Thailand),Turkey (FIPS 10-4 country code)
3392	TUC	Trades Union Congress
3393	TUG	TeX Users Group
3394	TUI	Text-based user interface (cf. CLI),among other uses
3395	TUN	Tunisia (ISO 3166 trigram)
3396	TUNS	Technical University of Nova Scotia
3397	TUR	Turkey (ISO 3166 trigram)
3398	TUSK	Tank Urban Survival Kit
3399	TUV	Tuvalu (ISO 3166 trigram)
3400	TV	Television,Teravolt,Transvestite,Tuvalu (ISO 3166 and FIPS 10-4 country code digram)
3401	Tv	Time value,a designation seen on some camera dials for shutter priority mode
3402	TVA	Tennessee Valley Authority
3403	TVG	Television Games (Network),Tick,Very Good,Often used by School Teachers when marking homework etc. (Tick VG)[1][2]
3404	TVR	TreVor (Wilkinson) Racing
3405	TVS	Tornado vortex signature
3406	TW	Republic of China (Taiwan) (ISO 3166 and FIPS 10-4 country code digram),Terawatt
3407	TWAIN	Technology Without An Interesting Name
3408	TWE	Trans World Entertainment
3409	TWI	The Welding Institute
3410	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
3411	TWN	Republic of China (Taiwan) (ISO 3166 trigram)
3412	TWP	Technical Working Paper
3413	TWS	Thermal Weapon Sight,Track While Scan
3414	TX	Texas (postal symbol),Transmit,Turkmenistan (FIPS 10-4 country code)
3415	TXV	Thermostatic Expansion Valve
3416	TYT	Take Your Time,Internet chat abbreviation
3417	TZ	Tanzania (ISO 3166 and FIPS 10-4 country code digram)
3418	TZA	Tanzania (ISO 3166 trigram)
3419	TZC	Tetrazolium chloride
3420	U	Uranium
3421	UA	Ukraine (ISO 3166 digram) Unit of Action
3422	UAAP	University Athletic Association of the Philippines
3423	UAB	University of Alabama at Birmingham
3424	UAV	Unmanned Aerial Vehicle,Unprotected Anal and Vaginal sex,UB[edit]
3425	UBC	United Baptist Church,University of British Columbia
3426	UBIGEO	Ubicación Geografica (Spanish for Geographical Location)
3427	UBS	Unbundled Bitstream Services,United Bank of Switzerland,United Banque Suisse
3428	UCBSA	United Cricket Board of South Africa
3429	UCF	University of Central Florida
3430	UCLA	University of California at Los Angeles
3431	UCLES	University of Cambridge Local Examinations Syndicate
3432	UCR	University of California at Riverside
3433	UCR	University of Costa Rica
3434	UCS	Union of Concerned Scientists
3435	UCSB	University of California at Santa Barbara
3436	UCSD	University of California at San Diego
3437	UDAS	Uppsala-DLR Asteroid Survey
3438	UDDI	Universal Description,Discovery and Integration
3439	UDTS	Uppsala-DLR Trojan Survey
3440	UE	Unit of Employment
3441	UEFA	Union of European Football Associations
3442	UESAC	Uppsala-ESO Survey of Asteroids and Comets
3443	UFC	Ultimate Fighting Championship
3444	UFO	Unidentified Flying Object, or: United Farmers of Ontario
3445	UG	Uganda (ISO 3166 and FIPS 10-4 country code digram)
3446	UGA	Uganda (ISO 3166 trigram)
3447	UGV	Unmanned Ground Vehicle
3448	UHF	Ultra High Frequency
3449	UHMW	Ultra-High Molecular Weight
3450	UHRB	Ultra-High Resolution Building (simulation)
3451	UIC	University of Illinois at Chicago
3452	UID	User ID
3453	UIUC	University of Illinois at Urbana-Champaign
3454	UJTL	Universal Joint Task List
3455	UKIP	United Kingdom Independence Party
3456	UKR	Ukraine (ISO 3166 trigram)
3457	UL	Underwriters Laboratories
3458	ULF	Ultra Low Frequency
3459	UM	U.S. Minor Outlying Islands (postal symbol; ISO 3166 digram)
3460	UMCP	Unit Maintenance Collection Point
3461	UMES	University of Maryland Eastern Shore
3462	UMI	U.S. Minor Outlying Islands (ISO 3166 trigram)
3463	UMIST	University of Manchester Institute of Science and Technology
3464	UMTS	Universal Mobile Telecommunications System
3465	UN	United Nations
3466	UNABOM	University and airline bomber (FBI case name)
3467	UNAIDS	(i/a) Joint United Nations Programme on HIV/AIDS
3468	UNAMSIL	United Nations Mission in Sierra Leone
3469	UNCF	United Negro College Fund
3470	UNCLOS	United Nations Convention on the Law of the Sea
3471	UNCSGN	United Nations Conference on the Standardization of Geographical Names
3472	UNCTAD	United Nations Conference on Trade and Development
3473	UNDCP	United Nations Drug Control Programme
3474	UNDE	(i/a) Union of National Defence Employees (Canada)
3475	UNDP	United Nations Development Programme
3476	UNEP	United Nations Environment Programme
3477	UNFCCC	United Nations Framework Convention on Climate Change
3478	UNFICYP	United Nations Peacekeeping Force in Cyprus
3479	UNGEGN	United Nations Group of Experts on Geographical Names
3480	UNHCR	United Nations High Commission (er) for Refugees
3481	UNICEF	United Nations Children's Fund (originally the United Nations International Children's Emergency Fund)
3482	UNICRI	United Nations Interregional Crime and Justice Research Institute
3483	UNIDO	United Nations Industrial Development Organization
3484	UNIFEM	United Nations Development Fund for Women (from the French Fonds de développement des Nations unies pour la femme)
3485	UNMIK	United Nations Interim Administration Mission in Kosovo
3486	UNOSOM	United Nations Operations in Somalia
3487	UNPROFOR	United Nations Protection Force (in former Yugoslavia)
3488	UNRISD	United Nations Research Institute for Social Development
3489	UNSM	Union of Nova Scotian Municipalities
3490	UNTAC	United Nations Transitional Authority in Cambodia
3491	UNTAET	(i/a) United Nations Transitional Administration in East Timor
3492	UNU	United Nations University
3493	UPdM	Università Popolare della Multimedialità
3494	UPI	United Press International
3495	UPN	United Paramount Network
3496	UPU	Universal Postal Union
3497	URBSFA	Union royale belge des sociétés de football association (French for Royal Belgian Football Association)
3498	URD	User Requirements Document
3499	URY	Uruguay (ISO 3166 trigram)
3500	US	United States (also ISO 3166 and FIPS 10-4 country code digram)
3501	USAF	United States Air Force
3502	USAFSPC	U.S. Air Force Space Command
3503	USAID	United States Agency for International Development
3504	USAPATRIOT	Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism
3505	USAREUR	United States Army Europe
3506	USB	Universal Serial Bus
3507	USCG	United States Coast Guard
3508	USDA	United States Department of Agriculture
3509	USDI	United States Department of the Interior
3510	USDOE	United States Department of Energy
3511	USDRE	(U.S.) Under-Secretary of Defense for Research and Engineering (1978-1986)
3512	USEC	United States Enrichment Corporation
3513	USFL	United States Football League
3514	USFWS	United States Fish and Wildlife Service
3515	USGS	United States Geological Survey
3516	USIA	United States Information Agency
3517	USJFCOM	United States Joint Forces Command
3518	USMC	United States Marine Corps
3519	USMNT	United States men's national (soccer) team
3520	USN	United States Navy
3521	USNB	United States Naval Base
3522	USNG	United States National Grid
3523	USNH	United States Naval Hospital
3524	USNI	United States Naval Institute
3525	USNO	U.S. Naval Observatory
3526	USNOFS	United States Naval Observatory Flagstaff Station
3527	USNP	United States Newspaper Program
3528	USNR	United States Navy Reserve
3529	USNS	United States Naval Ship
3530	USNZ	University Sport New Zealand
3531	USPS	United States Postal Service
3532	USPTO	United States Patent and Trademark Office
3533	USS	United States ship (sometimes meaningless; see Star Trek)
3534	USSPACECOM	United States Space Command
3535	USSR	Union of Soviet Socialist Republics
3536	UST	Underground Storage Tank
3537	USTRANSCOM	United States Transportation Command
3538	USWNT	United States women's national (soccer) team
3539	UT	Universal Time
3540	UTEP	University of Texas at El Paso (pronounced you-tep)
3541	UTM	Universal Transverse Mercator (geographical co-ordinate system)
3542	UUA	Unitarian Universalist Association
3543	UUID	Universally Unique Identifier (see also GUID)
3544	UUV	Unmanned Underwater Vehicle
3545	UW	University of Washington
3546	UWO	University of Western Ontario
3547	UWT	Under Water Telephone
3548	UWTG	Under Water Tug
3549	UWW	United World Wrestling
3550	UXO	Unexploded Ordnance
3551	UY	Uruguay (ISO 3166 and FIPS 10-4 country code digram)
3552	UZ	Uzbekistan (ISO 3166 and FIPS 10-4 country code digram)
3553	UZB	Uzbekistan (ISO 3166 trigram)
3554	VACIS	Vehicle And Container Inspection System
3555	VACIS	Victorian Ambulance Clinical Information System
3556	VANOS	Variable Nockenwelle System
3557	VAO	Vienna Art Orchestra
3558	VBA	Visual Basic for Applications
3559	vCJD	Variant Creutzfeldt-Jakob Disease
3560	VCNO	(U.S.) Vice Chief of Naval Operations
3561	VCofS	Vice Chief of Staff
3562	VCR	Video cassette recorder
3563	VCT	Saint Vincent and the Grenadines (ISO 3166 trigram)
3564	VDFS	VisualSVN Distributed File System (VDFS)
3565	VE	Venezuela (FIPS 10-4 country code; ISO 3166 digram)
3566	VEEGA	Venus Earth Earth Gravity Assist manœuvre
3567	VEN	Venezuela (ISO 3166 trigram)
3568	VERITAS	Very Energetic Radiation Imaging Telescope Array System
3569	VfD	s for deletion (used in Wikipedia)
3570	VFM	Value For Money
3571	VFMO	Very Fast Moving Object (astronomy)
3572	VFT	Virtual Function Table
3573	VFW	Veterans of Foreign Wars
3574	VG	British Virgin Islands (ISO 3166 digram)
3575	VGB	British Virgin Islands (ISO 3166 trigram)
3576	VH1	Video Hits One
3577	VHF	Very High Frequency
3578	VIA	Versatile Interface Adapter
3579	VIDS	Visual Information Display System
3580	VII	7 (in Roman numerals)
3581	VIII	8 (in Roman numerals)
3582	VIN	(i/a) Vehicle Identification Number (ISO 3779)
3583	VIP	Very Important Person
3584	VISCII	VIetnamese Standard Code for Information Interchange
3585	VIT	Vellore Institute of Technology
3586	VIVO	Video In Video Out
3587	VJ	Video Jockey
3588	VLAD	Vertical Line Array DIFAR
3589	VLBA	Very Long Baseline Array
3590	VLF	Very Low Frequency
3591	VLIW	Very Long Instruction Word
3592	VLPFC	VentroLateral PreFrontal Cortex
3593	VLPMC	VentroLateral PreMotor Cortex
3594	VLSI	Very-large-scale integration
3595	VM	Vietnam (FIPS 10-4 country code)
3596	VMF	Marine Fighting Squadron of the United States Marine Corps
3597	VMF	Variable Message Format
3598	VMN	VentroMedial Nucleus (neurophysiology)
3599	VN	Vietnam (ISO 3166 digram)
3600	VNIR	Visible and Near InfraRed
3601	VNM	Vietnam (ISO 3166 trigram)
3602	VNS	see entry
3603	VOA	Voice of America
3604	VOIP	Voice Over Internet Protocol
3605	VOLT	Visual OpenType Layout Tool
3606	VON	Victorian Order of Nurses
3607	VOR	Voice of Russia
3608	VOX	Voice Operated oscillator
3609	VPOTUS	Vice President of the United States
3610	VPN	Virtual Private Network
3611	VR	Virtual Reality
3612	VRSG	Virtual Reality Scene Generator
3613	VSHORAD	Very Short Range Air Defence
3614	VSO	Voluntary Services Overseas
3615	VSR	Very Special Relativity
3616	VTC	Video Tele-Conference
3617	VTEC	Variable valve Timing and Electronic lift Control
3618	VTOL	Vertical Take-Off & Landing
3619	VUB	Vrije Universiteit Brussel (Belgian university)
3620	VUT	Vanuatu (ISO 3166 trigram)
3621	VVAF	Vietnam Veterans of America Foundation
3622	VW	Volkswagen
3623	VZ	Verizon Communications (NYSE code)
3624	W3C	World Wide Web Consortium
3625	WAAC	Women's Army Auxiliary Corps (Britain) (World War I UK)
3626	WAAF	Women's Auxiliary Air Force (World War II UK)
3627	WACC	Weighted Average Cost of Capital (accounting)
3628	WACS	What-A-Cartoon! Show
3629	WAD	Weapons Alert Designator
3630	WAGGGS	World Association of Girl Guides and Girl Scouts
3631	WAL	see entry
3632	WAN	Wide area network
3633	WAP	Wireless Application Protocol
3634	WAPIMA	What a pain in my ass
3635	WAR	With All Respect
3636	WAsP	Short form of WAAAAP (Wind Atlas Analysis and Application Program)
3637	WAYP	White And Yellow Pages
3638	Wb	Weber
3639	WBC	World Boxing Council
3640	WBE	Work Breakdown Element
3641	WBO	World Boxing Organization
3642	WCBO	World Chess Boxing Organisation
3643	WCBP	World Center for Birds of Prey
3644	WCL	World Confederation of Labour
3645	WCW	World Championship Wrestling
3646	WDIN	Wildlife Disease Information Node
3647	WDWR	Walt Disney World Resort
3648	WEBS	Weapon Effectiveness Battle Simulation
3649	WEC	World Extreme Cagefighting
3650	WEEE	Waste Electrical and Electronic Equipment
3651	WEF	World Economic Forum
3652	WEM	West Edmonton Mall
3653	WEU	Western European Union
3654	WEZ	Weapon Engagement Zone
3655	WF	Wallis and Futuna Islands (ISO 3166 digram)
3656	WFC	Women's Forage Corps (World War II UK)
3657	WFD	Weapon of Focused Destruction
3658	WFF	Wallops Flight Facility
3659	WFI	Water for Injection
3660	WFH	Working from home
3661	WFP	World Food Program
3662	WFZ	Weapons Free Zone
3663	WH	Wehrmacht Heer (German World War II army vehicle licence plate code)
3664	WHAM	Wisconsin Hydrogen-Alpha Mapping (telescope)
3665	WHI	Women's Health Initiative
3666	WHIP	Walks plus hits per inning pitched
3667	WHO	World Health Organisation
3668	WHS	(U.S.) Washington Headquarters Services
3669	WIIFM	What's in it for me?
3670	WIP	Work In Progress
3671	WIPO	World Intellectual Property Organization
3672	WIPP	[Nuclear] Waste Isolation Pilot Plant
3673	WIYN	Wisconsin Indiana Yale NOAO telescope consortium
3674	WKYP	Will Keep You Posted
3675	WL	Wehrmacht Luftwaffe (German World War II air force vehicle licence plate code)
3676	WLB	Women's Land Brigade (World War II Canada)
3677	WLF	Wallis and Futuna Islands (ISO 3166 trigram)
3678	WLOG	Without Loss Of Generality (see WOLOG)
3679	WM	Wehrmacht Marine (German World War II navy vehicle licence plate code)
3680	WMANUS	West Midlands Area National Union of Students
3681	WMD	World Movement for Democracy
3682	WMI	Wildlife Management Institute
3683	WMO	World Meteorological Organization
3684	WNA	World Nuclear Association
3685	WNF	Will Not Fix
3686	WNIT	Women's National Invitation Tournament
3687	WNW	West North-West
3688	WO	Warrant Officer
3689	WOF	Width of Fabric
3690	WOFT	Waste Of Fucking Time
3691	WOFTAM	Waste Of Fucking Time And Money
3692	WOI	Wheels Of Italy
3693	WOM	Write Only Memory
3694	WOS	Wilson Ornithological Society
3695	WOT	Waste Of Time
3696	WP	White Phosphorus (ammunition)
3697	WPB	War Production Board during World War II
3698	WPE	World Pork Expo
3699	WPK	Wider Peacekeeping
3700	WR	Wide Receiver (football)
3701	WRAC	Women's Royal Army Corps (World War II UK)
3702	WRAIR	Walter Reed Army Institute of Research
3703	WRBWWRM	We Best What We Most
3704	WRC	World Rally Championship
3705	WRC	World Religions Conference
3706	WRNG	Warning
3707	WRS	Worldwide Reference System
3708	WRT	NHS Workforce Review Team
3709	WRT	The Linksys routers whose model name start with 'WRT'
3710	WRT	Third party firmware for the Linksys WRT routers and compatible models from other vendors.
3711	WRT	Web Runtime (WRT) is a portable application framework developed by Nokia that allows the creation of widgets on the S60 Platform.
3712	WRT	Wireless Receiver/Transmitter ( computer networks/IT )
3713	WRT	Wireless Ronin Technologies (digital signage)
3714	WRT	World Rally Team
3715	WRT	Writer Response Theory
3716	WSC	Weapon System Catalogue
3717	WSDL	Web Services Description Language
3718	WSJ	(The) Wall Street Journal
3719	WSROC	Western Sydney Regional Organisation of Councils
3720	WSSM	Winchester Super Short Magnum (family of rifle cartridges)
3721	WSTC	Women Signallers Territorial Corps (World War II UK)
3722	WSW	West South-West
3723	WTC	World Trade Center
3724	WTF	What the fuck?; also What a Terrible Failure (android)
3725	WTFH	What The Fucking Hell
3726	WTH	What the Hell
3727	WTO	World Trade Organization
3728	WUBU2	What you been up to
3729	WV	West Virginia (postal symbol)
3730	WVA	World Veterinary Association
3731	WVIAC	West Virginia Intercollegiate Athletic Conference
3732	WVR	Women's Volunteer Reserve (World War II UK)
3733	WVSC	Women's Volunteer Service Corps (World War II Canada)
3734	WVU	West Virginia University
3735	WW	see entry
3736	WWE	World Wrestling Entertainment
3737	WWI	World War I
3738	WWII	World War II
3739	WWIII	World War III
3740	WWJD	What would Jesus do?
3741	WWS	Wheaton Warrenville South High School
3742	WWWF	World Wide Wrestling Federation
3743	WXO	Weather [Executive] Officer
3744	WY	Wyoming (postal symbol)
3745	WZ	Swaziland (FIPS 10-4 country code)
3746	XBML	eXtended Business Modelling Language
3747	XC	Ninety (in Roman numerals)
3748	XCBL	XML Common Business Library
3749	XD	Used in chatrooms or email for smiley face. X is the eyes; squinted D is the mouth; XD.
3750	Xe	Xenon
3751	XFA	XML Forms Architecture
3752	XFC	Xtreme Fighting Championships
3753	XFD	Fighter aircraft made by Douglas
3754	Xfe	X File Explorer
3755	XFF	X-Forwarded-For
3756	XFG	Exfoliation glaucoma
3757	XFR	Automobile made by Jaguar
3758	XFT	X FreeType interface library
3759	XG	Automobile made by Hyundai
3760	XGA	Extended Graphics Array
3761	XGP	Extreme Game Player
3762	XHTML	eXtensible Hypertext Markup Language
3763	XI	Eleven (in Roman numerals)
3764	XII	Twelve (in Roman numerals)
3765	XIII	Thirteen (in Roman numerals)
3766	XIV	Fourteen (in Roman numerals)
3767	XIX	Nineteen (in Roman numerals)
3768	XJS	Automobile made by Jaguar
3769	XKB	X keyboard extension
3770	XKE	Automobile made by Jaguar
3771	XKR	Automobile made by Jaguar
3772	XML	eXtensible Markup Language
3773	XMSF	eXtensible Modelling and Simulation Framework
3774	XNA	X-No-Archive,Xeno Nucleic Acid
3775	XNC	X Northern Captain
3776	XNU	X is Not Unix
3777	XP	eXperience Point (role-playing games)
3778	XQJ	XQuery API for Java™
3779	XRAY	X-Ray
3780	XRML	eXtensible Rights Markup Language
3781	XS	Xiaolin Showdown
3782	XSL	eXtensible Style Language
3783	XTMH	eXtreme Technology Multiprocessor Hyperlanguage
3784	XUL	XML User Interface Language
3785	XV	Fifteen (in Roman numerals)
3786	XVI	Sixteen (in Roman numerals)
3787	XVII	Seventeen (in Roman numerals)
3788	XVIII	Eighteen (in Roman numerals)
3789	XWF	Xcitement Wrestling Federation
3790	XX	Twenty (in Roman numerals)
3791	Xyl	Xylobium
3792	XZN	Triple square screw driver
3793	y	Yocto-
3794	Y2K	Year Two Thousand
3795	yA	Yoctoampere
3796	Ya	Yottayear
3797	YaBPr	Yet another Brother Pat rant
3798	YABSLAG	Yet another boy singing like a girl
3799	YAC	Youth-Adult Committee
3800	YAFLA	Yet Another Five Letter Abbreviation
3801	YAP	Young Aspiring Professional
3802	YB	Youcef Benzouada (Southern Algerian name)
3803	Yb	Ytterbium
3804	yC	Yoctocoulomb
3805	YC	Yottacoulomb
3806	YDS	Yosemite Decimal System (climbing)
3807	YE	Yemen (ISO 3166 digram)
3808	YEM	Yemen (ISO 3166 trigram)
3809	yF	Yoctofarad
3810	YF	Yottafarad
3811	yg	Yoctogram
3812	Yg	Yottagram
3813	YGCO	Yamaneko Group of Comet Observers
3814	Ygo	Yu-Gi-Oh!
3815	yH	Yoctohenry
3816	YH	Yottahenry
3817	YHBT	You Have Been Trolled
3818	YHII	You Have It Inside
3819	YHS	Ya Hoor sur!
3820	Yi	Yobi
3821	Yippie	Youth International Party + suffix
3822	yJ	Yoctojoule
3823	YJ	Yottajoule
3824	yK	Yoctokelvin
3825	YK	Yottakelvin
3826	YKYFCW	You know you're from Christchurch when (post-earthquake joke)
3827	yL	Yoctolitre
3828	YL	Yottalitre
3829	ym	Yoctometre
3830	Ym	Yottametre
3831	YMMD	You Make My Day
3832	yN	Yoctonewton
3833	YN	Yottanewton
3834	YOLO	You Only Live Once
3835	YPA	Yards per Pass Attempt (football statistic)
3836	YPIO	Your Problem Is Obvious
3837	YPO	Young Presidents' Organization
3838	ys	Yoctosecond
3839	yS	Yoctosiemens
3840	Ys	Yottasecond
3841	YS	Yottasiemens
3842	YSI	Young Scots for Independence
3843	yT	Yoctotesla
3844	YTD	Year-To-Date
3845	YTM	Yield to Maturity
3846	YTS	Youth Training Scheme
3847	YTT	Yoshi Topsy-Turvy
3848	Yuppie	Young Urban Professional + suffix
3849	yV	Yoctovolt
3850	YV	Yottavolt
3851	yW	Yoctowatt
3852	YW	Yottawatt
3853	YYH	YuYu Hakusho
3854	z	Zepto
3855	Z	Zetta
3856	zA	Zeptoampere
3857	ZAF	South Africa (ISO 3166 trigram)
3858	ZAMS	Zero age main sequence
3859	ZAS	Zylinder Abschaltung System
3860	ZBT	Zero-Balance Transfer (accounting)
3861	zC	Zeptocoulomb
3862	ZC	Zettacoulomb
3863	ZCM	(n) ZENworks Configuration Management
3864	ZCMK	Zone Control Master Key
3865	ZCU	Zimbabwe Cricket Union
3866	\a	Atto-