Initialisms in English (500)

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Word Meaning
OOXML (computing) Office Open XML: a Microsoft file format for spreadsheets, charts, wordprocessed documents, etc.
BX (US
military
) Base Exchange of the U.S. Air Force.
DPRFP (electronics) Direct Polar RF Power.
rhb (cricket) a 'r'ight-'h'anded batsman
MDN (Mozilla
Web
) Initialism of Mozilla developer
SCA (aeronautics) Initialism of :w:Shuttle Carrier Aircraft
BBD bigger better deal
FTTN (telecommunications) fibre to the node
WACC weighted-average cost of capital
DPRK Democratic People's Republic of Korea (North Korea)
IDM (design) Initialism of intelligent
IMC Instrument Meteorological Conditions
TRS tip, ring, sleeve: a type of electrical connector (TRS connector)
MP2 MPEG Layer 2 - A streamed audio file using this MPEG layer.
ppt Parts per trillion.
BBE best before end: used to indicate a use-by date at the end of a specified month
NDTI National Disease and Therapeutic Index
LA Los Angeles, a city in the United States of America
ODIHR (politics) Office for Democratic Institutions and Human Rights
DPS Initialism of delivery (a system of automated letter sorting used by the United States Postal Service.)
RHD Recommended Human Dose
ERP Initialism of erotic roleplay
PEP Initialism of post-exposure prophylaxis
IDMC Independent Data Monitoring Committee.
CORBA (software engineering) Initialism of common
BASc Abbreviation of Bachelor of Applied Science
NLP Initialism of neuro-linguistic programming
KM Knowledge Management
GIP (computing) Initialism of GSM interworking (profile that allows a DECT base station to form part of a GSM network, given suitable handsets)
ACI (grammar) Initialism of accusativus cum infinitivo
PAYG pay-as-you-go
ANT Afghanistan National Television.
SAS (British
AU
NZ
military
) Special Air Service; an elite unit of the British army. Similar units operate in the Australian and New Zealand armies.
Transact-SQL (computing
databases
) Initialism of transact
IGBT (electronics) Insulated-Gate Bipolar Transistor.
TRT (transportation) Initialism of w:Transportation Research Thesaurus
UC University of California
MP3 (computing
audio
software
) MPEG-1 Audio Layer 3, an audio data compression format.
VOS Verb-Object-Subject: a language is VOS if a typical sentence starts with the verb, followed by the object, followed by the subject.
LGB Initialism of lesbian
OCP Initialism of oral contraceptive pill
LoD (software) Initialism of Law of Demeter
DPT (medicine) Doctor of Physical Therapy
HM His Majesty, the title of a king
IGCSE International General Certificate of Secondary Education; an internationally recognised qualification taken by secondary school students in England, Wales and Northern Ireland. Similar to the GCSE.
AUTEC (military
US
) Atlantic Undersea Test and Evaluation Center
FIDS 'F'light 'I'nformation 'D'isplay 'S'ystem; a key system of every airport for displaying actual flight information on several display devices (e.g. monitors, LED boards, etc.) and Intranet real-time information distribution/broadcasting for airport staff.
MTV (television) Music Television, a television channel that originally showed mostly music videos but now shows a wide variety of content
PPV (television) pay-per-view
FU follow-up
NIRF Near-InfraRed Fluorescence
DbC (software
design
) Initialism of design by contract
VSO Verb-Subject-Object: a language is VSO if a typical sentence starts with a verb, followed by the subject, followed by the object.
LGBT Initialism of lesbian
CAC (finance) Initialism of w:Collective action clause
DQ Dairy Queen (at Wikipedia)
SASAE "Stamped And Self-Addressed Envelope".
IMDG (shipping) International Maritime Dangerous Goods, a code designed to standardize safety of dangerous goods being transported by sea.
PLU (UK) people like us
UCA Unicode Collation Algorithm, an algorithm which defines a customizable method to compare two strings. These comparisons can then be used to collate or sort text in any writing system and language that can be represented with Unicode.
bbiaf (Internet) (I'll) be back in a few (minutes)
CYA 'C'over 'y'our 'a'ss.
KSAs knowlegde, skills, and abilities
OCR (computing) Initialism of 'Optical Character Recognition' (the principle) or 'Optical Character Reader' (the scanning device)
THT (electronics) Abbreviation of Through-Hole Technology
EOM (computing) End of message
ETI Ethical Trading Initiative.
AoD Above Ordnance Datum. Used to specify heights above mean sea level on General Arrangement and other technical drawings. Usually specified in metres, eg +62.0m.
MP4 (computing) Short for MPEG-4 Part 14; A file format for playing music and videos
PMC (military) Initialism of popular
DBD Initialism of database (database driver of Perl DBI)
GWR (UK
rail transport
) Great Western Railway
MARDI (space science
NASA
) Initialism of w:Mars Descent Imager (Mars Science Laboratory onboard the Curiosity rover at Mars.)
EIA (biology) Initialism of Enzyme Immunoassay
HMA (dated
computing
) High Memory Area
EOMB (US) explanation of Medicare benefits
IUML Indian Union Muslim League, a Muslim nationalist political party in India.
PQ (chemistry) plastoquinone
NEP New Economic Policy
USAN United States Adopted Name - unique nonproprietary names assigned to pharmaceuticals marketed in the United States.
HAGS have a good (or great) summer
EIB (military
US
) Expert Infantryman Badge
HMAC (authentication
Internet
) Initialism of hash-based (a specific type of the message authentication code (MAC) involving a cryptographic hash function and a secret cryptographic key)
CIR Committed Information Rate
ESTJ (psychology) extraverted, sensing, thinking and judging: a personality type in the Myers-Briggs type indicator
UCAV unmanned combat aerial vehicle Initialism of unmanned combat aerial vehicle
PQLI physical quality-of-life index
KED (emergency medicine) Kendrick Extrication Device
UPA Initialism of w:Uralic Phonetic Alphabet
VSS (aviation
space science
) Virgin SpaceShip — spaceship prefix for Virgin Galactic spacelines
AAASS (dated) American Association for the Advancement of Slavic Studies, now known as Association for Slavic, East European, and Eurasian Studies
MDT Initialism of w:Mountain Daylight Time
ATKT (education) Allowed To Keep Term
UCCJA Uniform Child Custody Jurisdiction Act
SIR (manufacturing) surface insulation resistance
BeV (physics
US
) billion electron volt, 10 eV. A unit used for measuring the energy of subatomic particles.
NIH (government
US
) National Institutes of Health
DBEYR (Internet slang) Don't believe everything you read.
LGBTI Initialism of lesbian
DS (medical
usually
used attributively
) double strength
HMAS (nautical
military
Australia
) Her Majesty's Australian Ship. The designation of Australian ships and naval bases.
TOFU (networking) trust-on-first-use, a type of network software security model where a client requests an identification code from a remote host when establishing the first connection
CISM (emergency medicine) critical incident stress management
JPA (computing) Initialism of Java persistency
VoSIP (computing) Voice over Secure IP
LGBTIQ Initialism of lesbian, gay, bisexual, transgender/transsexual, intersex and queer/questioning
tanstaafl Alternative form of TANSTAAFL
RHS right-hand side
ECD 'E'lectron 'c'apture 'd'etector.
HMBS His/Her Majesty's Bahamian Ship. A designation for British ships from either the Bahamas or Bermuda.
MDX Multidimensional Expressions
MODCA Mixed Object: Document Content Architecture, an IBM container format, somewhat like TIFF. Often used to store IOCA images. Also written MO:DCA.
IPS Institute for the Psychological Sciences
JPAS (military
US
) Joint Personnel Adjudication System
NED New English Dictionary
RHU (dictionaries) Random House Dictionary of the English Language Unabridged
ANG (US) Air National Guard
PMG Postmaster General, the person in charge of the postal service of a country, and by extension, the postal service itself.
IV (medicine) Intravenous.
BBN (astronomy
physics
) Big Bang nucleosynthesis
NIS New Israeli Sheqel
DHS (US) Department of Homeland Security
STV single transferable vote
LGBTQ Initialism of lesbian, gay, bisexual, transgender, queer (or sometimes questioning)
OBE Officer of the Order of the British Empire
OJT Initialism of lang=en
DSC Differential Scanning Calorimetry
MCC (cricket) Initialism of w:Marylebone Cricket Club (the former governing body of cricket).
HMCS (nautical
military
Canada
) Her Majesty's Canadian Ship. A designation of ships from the Canadian Forces Maritime Command
EXIF (computing) exchangeable image file format, a standard that specifies the formats for images, sound, etc. in digital cameras and similar devices
MPD (aviation
travel industry
) multi-purpose document. Alternate name for a miscellaneous charge order
PMH Polska Marynarka Handlowa (Polish Merchant Navy)
ISO The Imperial Service Order.
FOP Fraternal Order of Police
NM Not meaningful.
DATY (slang) Stands for Dining At The Y. Performing oral sex on a woman with her legs spread in Y position.
dbh (botany) diameter at breast height, a standard method of expressing the diameter of the trunk or bole of a standing tree. The diameter is measured at the height of an adult's breast.
GEB Guaranteed equity bond.
LGBTQ+ Synonym of LGBT+
YIVO Institute for Jewish Research
YOM You owe me.
ILEC (US telecommunications) incumbent local exchange carrier.
COCP Initialism of combined oral contraceptive pill
FEM (electronics) Front End Module
UJT (electronics) Initialism of lang=en
AWG American wire gauge.
FOM Formula One Management.
BBP Benzyl Butyl Phthalate
fos freedom of speech
nid (linguistics) noun inanimate dependent
DAG 'Deputy Attorney General' in several nations’ federal governments
nm (Internet) never mind
DBI Initialism of database (module of the Perl 5 language)
BOT Initialism of Build–operate–transfer
VOT Initialism of voice onset time
OCS Initialism of office
OP Opening.
OWA (Internet
computing
) (Microsoft) Outlook Web Access
TEM transmission electron microscope
HMF (chemistry) 5-hydroxymethylfurfuran
EONIA (finance) Initialism of Euro overnight index average
PMI (aviation) Initialism of w:Son Sant Joan Airport (IATA code)
SML (computing) Initialism of Standard ML (a functional, modular programming language)
dEG (galaxy) dwarf elliptical galaxy
VetMB Degree of Bachelor of Veterinary Medicine, awarded by the University of Cambridge.
VoT (computing) Initialism of Video of Things (The field of IoT concerned with automated video production and streaming of everyday events or things)
LGBTQA Initialism of lesbian, gay, bisexual, transgender, queer/questioning, intersex, and ally
OCT (health) Initialism of optical coherence tomography (an optical signal acquisition and processing method that captures high-resolution, three-dimensional images from biological tissues)
AIO All-in-one (especially referring to computers, where all components exist as a single unit, rather than as separate pieces)
HMG 'Her Majesty's Government', or, 'His Majesty's Government'; referring to the government of the United Kingdom.
Eonia (finance) Alternative form of EONIA
AUA (Austria
aviation
) Initialism of Austrian (ICAO code of the flag carrier of Austria and a subsidiary of the Lufthansa Group)
TWA Trans World Airlines
SML/NJ (computing) Initialism of Standard ML of New Jersey (a compiler and programming environment for the Standard ML programming language)
NMCC (military
US
) National Military Command Center
USAT (newspaper) USA Today
LAOS (politics) ΛΑΟΣ, the Popular Orthodox Rally, a Greek political party ('Λαϊκός Ορθόδοξος Συναγερμός').
op Alternative form of OP (original post, original poster)
RUSI (science) Initialism of royal
TIN (US
Federal taxation
) Taxpayer Identification Number.
SIMAP (biology) Initialism of w:SIMAP It is a freely accessible database of protein similarities created using distributed computing.
vta (linguistics) verb transitive animate
LGBTQIA Initialism of lesbian, gay, bisexual, transgender, queer/questioning, intersex, and ally
OTE On-target earnings
WW Initialism of worldwide
YK Yukon, a Canadian territory
AION (ophthalmology) Anterior ischaemic optic neuropathy (UK), Anterior ischemic optic neuropathy (US).
HMI (technology) Initialism of human
MOB (nautical) 'M'an 'O'ver 'B'oard, used e.g. on the emergency button of a satellite navigator. By pushing the button the operator stores the coordinates of a man overboard incident for easy access.
BAC Blood alcohol concentration (or blood alcohol content)
SMLT (computing) Split Multi-Link Trunking; A link aggregation protocol designed by Nortel (now Avaya).
SMOS (ESA
space
) Initialism of soil (a satellite from the Living Planet Programme)
JPL (space
US
) Initialism of w:Jet Propulsion Laboratory
BF brought forward
NMEA National Marine Electronics Association; shortened form of NMEA 0183.
DBP 'D'i-n-'B'utyl 'P'hthalate
USB (computing) Universal Serial Bus; a serial bus standard for connecting devices
LGBTTQQIAAP Initialism of lesbian, gay, bisexual, transgender, transsexual, queer, questioning, intersex, asexual, ally
OOA (computing
design
) Initialism of object-oriented
TAAF French Southern and Antarctic Lands
AIP (printing technology) acoustic inkjet printing
HRM (business
management
) Human resource management.
IRQ (computing) interrupt request
SMM single-molecule magnet
bf (Internet slang) boyfriend
DSLAM Digital Subscriber Line Access Multiplexer.
IMF International Monetary Fund
AVL Audio, video and lighting, for a performance
SMMC (military
US
) Sergeant Major of the Marine Corps
JPQL Initialism of Java persistence
NF National Formulary, is a book of public pharmacopeial standards.
OMOV one man, one vote
DOF Initialism of date of filing
SASE Self Addressed Stamped Envelope.
IBS Initialism of identical by state
SELSIS Space Environment Laboratory Solar Imaging System
mpg Alternative form of MPG
IRR (military
US
) Individual Ready Reserve
SMB (computing
Windows
) Server Message Block
SMO Site Management Organization; an organization that provides clinical trial related services.
SOA (computing
architecture
) Initialism of search-oriented architecture
BFA Bachelor of Fine Arts
DBSA 'D'epression and 'B'ipolar 'S'upport 'A'lliance
LGM 'l'ittle 'g'reen 'm'an
WOCA (computing) Initialism of write once, compile anywhere
WWE World Wrestling Entertainment (formerly known as WWF): U.S. professional wrestling organization.
DUMBELS (emergency medicine) A mnemonic ("diaphoresis/diarrhea, urination, miosis, bronchospasm/bradycardia/bronchorrhea, emesis, lacrimation, salivation") used to identify the common symptoms of certain affections of a cholinergic toxidrome.
SCR Silicon Controlled Rectifier. Thyristor (electronics).
SHF (electronics) Initialism of super high frequency
mph Initialism of lang=en
LGPL (computing
copyright law
) Initialism of GNU lesser
LIS Library and information science.
SYHA Scottish Youth Hostel Association.
EB Initialism of east bound
HRMS human resource management system
IBSA (politics
economics
) India, Brazil and South Africa
FAETUPAC (US
military
) Fleet Airborne Electronics Training Unit (Pacific) Squadron
SER State Emergency Relief
pMOS (electronics) a MOSFET with a p-type channel (a semiconductor doped with an element creating a surplus of holes).
FOR Field Of Research.
vti (linguistics) verb transitive inanimate
RAND (legal) Reasonable and nondiscriminatory; a standard used with respect to licensing.
ODM (company) Initialism of original#English (a company that designs and manufactures a product that will be rebranded for sale by another company.)
YKWIM (text messaging) you know what I mean
ESTP (psychology) extraverted, sensing, thinking and perceiving: a personality type in the Myers-Briggs type indicator
SCWS (military
US
) Seabee Combat Warfare Specialist insignia
SERM (medicine) selective estrogen receptor modulator
DC (legal) District Court
BISDN Broadband Integrated Service Digital Network
VTID (electronics) Vernier Time-Interval Digitizer.
LISA (ESA
physics
space
) Initialism of laser#English (Pathfinder, an ESA space probe that will test technologies needed a gravitational wave observatory)
WIA (computing) Windows image acquisition
DSMLT (computing) Distributed Split Multi-Link Trunking; A Distributed link aggregation protocol designed by Nortel (now Avaya).
SHHH self-help for hard of hearing
PLUR Peace, love, unity, respect: an unofficial code of conduct in the rave subculture.
pmpm (medical) "per member per month"
AVO (Australia) Apprehended Violence Order, a court order used to protect someone from violence or harassment.
FOD (military
particularly on an aircraft carrier's deck
) foreign object debris
dc Alternative form of DC
STB (television) set top box - a video signal converter for televisions
LGTM looks good to me
ODN (UK) Ordnance Datum Newlyn
OMB Office of Management and Budget (US)
DWB Driving while black (or brown), a sarcastic reference to racial profiling by police investigating driving offences.
SCC Society of Cosmetic Chemists
I.C.S.R. (politics) Initialism of the
IGMC (internet slang
UK
humorous
) An admission that one has embarrassed oneself and should leave.
MPKC Multivariate public-key cryptosystem.
SMC (galaxy) Small Magellanic Cloud
BC Before Christ. Often written in small caps.
BFE Biofeedback Foundation of Europe
OS (UK) an Ordnance Survey map.
DSN (computing) Initialism of data
ALR American Law Review
HMNZS Her Majesty's New Zealand Ship. The designation of New Zealand ships and naval bases.
HRT (medicine) hormone replacement therapy
SERA (EU
railways
) Initialism of single
PIPA Participatory impact pathways analysis, a project management approach.
SMCR (military
US
) Selected Marine Corps Reserve
DCA The IATA airport code for Ronald Reagan Washington National Airport (formerly 'D'istrict of 'C'olumbia 'A'irport) in Washington, D.C.
USCF United States Cycling Federation
PSP (chemistry) phenolsulfonphthalein
LH (biology) luteinizing hormone
DSO (astronomy) Deep sky object
RHIP (military
Internet
) Rank has its privilege
HMO (US
medicine
) Health Maintenance Organization
SCDMA Synchronous Code Division Multiple Access
IBU International Bitterness Units, a measure of the bitterness of beer
ISF Initialism of international
SMD (video games) Sega Mega Drive
NAVMC (military
US
) Navy and Marine Corps
NFI (Internet) No fucking (freaking) idea; Expresses lack of knowledge on the subject matter
BFFL (internet slang
text messaging
) Best friends for life.
USCG The United States Coast Guard (the coast guard of the United States).
OOC (fandom slang) out of character
RP Received Pronunciation
CNP copy number polymorphism
COE Code of Ethics (?)
PMS Performance management system, performance measurement system or performance monitoring system [Note that these are NOT synonymous, but are used in the same field, so intended usage should be confirmed if important.]
SME (business) Small and Medium-sized Enterprise; Small- to Medium-Sized Enterprise
DCAP-BTLS (emergency medicine) deformities, contusions, abrasions, punctures / penetrations, burns, tenderness, lacerations and swelling
PSR Police Service Representative, an LAPD dispatcher
OPAC (library science) Online public access catalog.
REMIC (US
finance
) Real Estate Mortgage Investment Conduit
ROH (travel) run of house
ENTJ (psychology) extraverted, intuitive, thinking and judging: a personality type in the Myers-Briggs type indicator
HVD Initialism of lang=en
SCEA (software) Initialism of w:Sun Certified Enterprise Architect
EVC (ETCS
railway
) Initialism of European (the main on-board unit on ETCS-controlled trains)
MPM (travel
aviation
) Maximum Permitted Mileage
ISFJ (psychology) introverted, sensing, feeling and judging: a personality type in the Myers-Briggs type indicator
SMEAC (military) Situation Mission Execution Admin/logistics Command/signal
FOW (cricket) fall of wicket
nmu (Internet) not(or nothing) much, you?
DCAPBLSTIC (emergency medicine) deformities, contusions, abrasions, punctures / penetrations, burns, lacerations, swelling, tenderness, instability, and crepitus.
ADMET (pharmacology) absorption, distribution, metabolism, excretion, toxicity: A set of test categories used together in drug discovery to provide insight into how a pharmaceutical drug interacts with the body as a whole.
THAM (chemistry) Tris(hydroxymethyl)aminomethane, an organic compound.
CLEP College Level Examination Program
i.q. the same as
PIRG an initialism for public interest research group, non-profit organizations dedicated to civic engagement
MPMD Multiple program multiple data.
IOF (military
Israel
) Israel Occupation Forces
ISFP (psychology) introverted, sensing, feeling and perceiving: a personality type in the Myers-Briggs type indicator
SNF Skilled Nursing Facility
SS Schutzstaffel
AJP (computing
eclipse
Web
) Initialism of Apache JServ protocol
HVGC (astronomy) Initialism of lang=en (a globular cluster with a velocity greater than the escape velocity of its host galaxy)
CNSA China National Space Administration
SHE Initialism of standard hydrogen electrode.
BCBS Blue Cross Blue Shield
BFI Brute Force and Ignorance - programming jargon for relying on raw computing power. For example, an algorithm that uses BFI might search through all possible options to find the single best option, whereas a more sophisticated algorithm might deduce the best option using a set of rules. BFI based algorithms tend to be simpler, and can under some circumstances be faster.
BION believe it or not
USCT (history) Initialism of w:United States Colored Troops
DHV (seduction community) Demonstrate higher value / demonstration of higher value.
LHB (cricket) a 'L'eft-'H'anded Batsman
OQ obligatory quote
rpd (mathematics) Initialism of relative pointwise distance
HVLS high-volume low-speed: describing a type of slow-moving mechanical fan used in commercial and industrial settings
PMSL (UK
Internet slang
) Pissing myself laughing; used to indicate great amusement.
BCC Alternative form of bcc, blind carbon copy
JRPG (video games) Japanese role-playing game.
GED (US
education
) General Educational Development
QL (computer language
databases
) Initialism of query
lhb (cricket) a 'l'eft-'h'anded batsman
OPI (military
government
) Office of Primary Interest.
OQR (military
US
) Officer Qualification Record
SWMBO (humorous) She who must be obeyed — one's wife or female partner.
HATEOAS (networking) Acronym of Hypermedia As The Engine Of Application State (an interface restriction of a RESTful service)
WWW Initialism of World Wide Web
OV 'O'rbiter 'V'ehicle - the US space shuttle, an orbiter vehicle
ECG (cardiology) Initialism of electrocardiogram
HVPT Hyperventilation provocation test.
bcc body-centered cubic
DCC (organic chemistry) dicyclohexylcarbodiimide
SSA (geography) Initialism of Sub-saharan Africa
ECGD (British) 'E'xport 'C'redits 'G'uarantee 'D'epartment
ECM Initialism of w:engine control unit
ROR (finance) rate of return
RPE-LPC Regular pulse excited-Linear Predictive Coder
PMTCT (medicine) prevention of mother-to-child transmission of HIV.
JS JavaScript
BFPO British Forces Post Office
DCD (medicine) Abbreviation of lang=en or Abbreviation of lang=en
SSAA Sporting Shooters Association of Australia
DI Initialism of detective inspector (Is a police rank used in Commonwealth countries.)
DSS Department of Social Services
ROTFL (Internet slang
dated
) Rolling On The Floor Laughing; indicates great amusement at something in a discussion group, etc.
MEDLI (space science
NASA
) Initialism of w:Mars Science Laboratory (Mars Science Laboratory entry vehicle heat shield involved in the landing of the Curiosity rover on Mars.)
CHF Congestive Heart Failure
ESR electron spin resonance
UNEP United Nations Environment Programme
SSADM (computing) Initialism of w:Structured systems analysis and design method
PYRTE Pull You Round Traction Engine, a hobbyist steam engine.
DST Daylight Saving Time
ROTFLMAO (Internet
abbreviation
) Rolling On The Floor Laughing My Ass/Arse Off.
I3 (Internet) An abbreviation of Intermud-3, a protocol for instant communication between MUDs via the Internet.
CNV (genetics) copy-number variant, copy number variation
MPP (computing) Massively Parallel Processing
PN part number
NFLS Initialism of Newton's flaming laser sword
BFTT (military
US
) Battle Force Tactical Training
PVA patterned vertical alignment
QVT (software) Abbreviation of Query/View/Transformation (a standard for model transformation in a certain model-driven architecture.)
AAC Advanced Aircraft Corps
ECH (chemistry) epichlorohydrin
ECML (UK
rail transport
) East Coast Main Line
TOR (management) Terms of reference
JSA Jobseeker's Allowance.
NICHED [http://www.niched.org National Institute of Childcare and Education], a UK-based organisation working to improve standards in childcare and education through training courses and raising public awareness.
BIBA (medicine) Brought in by ambulance.
PVAc (also 'PVA') polyvinyl acetate
OODA (military) Initialism of observe (a decision cycle for military combat operations and other processes)
ROTFLMGDMFAO (Internet slang
vulgar
) Rolling on the floor laughing my goddamned motherfucking ass (or arse) off.
SAIC Science Applications International Corporation, a defense contractor, one of the largest employee-owned companies in the USA.
IA Initialism of immediate action This is the procedure to determine the cause of a rifle stoppage
ICOP (astronomy
Islam
) Initialism of Islamic crescent moon
CON 'C'ertificate 'o'f 'N'eed.
FOE Friends of the Earth
JSC (business
legal
) Initialism of joint-stock company
NFS network file system
NOAC (medicine) 'N'ovel 'o'ral 'a'nti'c'oagulants, 'n'ew 'o'ral 'a'nti'c'oagulants, or 'n'on-vitamin K antagonist 'o'ral 'a'nti'c'oagulants.
DCH Department of Community Health
PSB Public Security Bureau (Chinese police)
ECTS (railways
transportation
) Initialism of European train (a signalling, control and train protection system, especially for high-speed lines.)
ROTFLMMFAO (internet slang
vulgar
) Rolling on the floor laughing my motherfucking ass/arse off.
HMRC (UK) Her Majesty's Revenue and Customs
CO (military) commanding officer
MOV Metal-Oxide Varistor. (electronics)
MPPs (computing) million packets per second.
FRAND (legal) Fair, reasonable and nondiscriminatory; a standard used with respect to licensing.
NNS Initialism of lang=en
SSB (electronics
communication
) single sideband - a type of radio emission.
VESA (computing) Video Electronics Standards Association
ROTFLMMFGDAO (Internet slang
vulgar
) Rolling on the floor laughing my motherfucking goddamned ass (or arse) off.
HMS (UK
nautical
military
) Her (or His) Majesty's Ship — ship prefix of the Royal Navy of the UK
MPRC (military
US
) Military Personnel Records Center
NFU (set theory) New Foundations with Urelements
DCI Initialism of detective chief inspector (a police rank used in Commonwealth countries)
AFP (in Australia) Initialism of Australian federal
EEA European Economic Area (the EU plus Norway, Iceland etc)
ROTFLOL (internet) rolling on the floor laughing out loud
HMT Human Metabolome Technologies
ESF European Science Foundation
ESRIN (ESA
space
) Initialism of European space
IAAF (sports) Initialism of w:International Association of Athletics Federations
MOTOS member(s) of the opposite sex
UCSD (education
US
) Initialism of w:University of California, San Diego
IPv4 Internet Protocol version 4.
IRRI Initialism of international, an agricultural Institute, with headquarters in Philippines.
BGAN Broadband Global Area Network
DCIS 'D'uctal 'C'arcinoma 'I'n 'S'itu
KOR (historical) The Komitet Obrony Robotników (Workers' Defence Committee), a Polish workers' committee which preceded the Solidarity movement.
QO quality operations
DIA (US
military
) Defense Intelligence Agency
BPC the British Pharmaceutical Codex
EEC European Economic Community, later also known as the European Community (EC). Has now been replaced with EU, European Union.
RPL (education) recognition of prior learning
HS-DSCH (communication
electronics
) High Speed Downlink Shared Channel (in UMTS).
APGAR (emergency medicine) 'A.P.G.A.R.'
IPv6 (internet) Internet Protocol version 6, a successor to IPv4 allowing for a much larger number of possible IP addresses.
FoE Fraternal Order of Eagles
JSDT (eclipse
JavaScript
software
) Initialism of JavaScript development
DCL (British): Initialism of w:Doctor of Civil Law (a terminal higher education degree)
OHA Office of Hearings and Appeals (US SSA)
DTA Destination Time of Arrival.
ECO (astronomy
physics
) Abbreviation of lang=en (a type of black hole replacement, to avoid having gravitational singularities)
HMTSS Her Majesty's Tuvaluan State Ship. The designation of the sole Tuvaluan ship for sea patrol (the HMTSS Te Mataili).
HS-PDSCH (communication
electronics
) High Speed Physical Downlink Shared Channel (in UMTS).
HWB (computing) Initialism of hardware device (specialized type of computer hard disk controller)
ICA Innovative Communications Alliance - alliance formed by Microsoft and Nortel for Unified communications.
TSX Toronto Stock Exchange
CP cyberpunk
SMP (British) Statutory maternity pay: payments made by an employer to an employee who is absent from work due to her pregnancy.
UNODIR (military) Unless otherwise directed.
PSD Payment Services Directive
BPEL (computing) Clipping of WS-BPEL
ORC Orange River Colony, a name given to the Orange Free State when annexed by Britain in 1900.
ECU (automotive) Initialism of w:Engine control unit
HS-SCCH (communication
electronics
) High Speed Shared Control Channel (in UMTS).
PETN pentaerythritol tetranitrate
BAK 'Basic Aeronautical Knowledge', an initial theory course for trainee pilots.
JSF (aviation
military
US
) Initialism of joint
NGA (US) National Governors Association
psu Practical salinity unit
PUR (organic chemistry) polyurethane
LJ (aviation) Light Jet.
DTD (computing) Initialism of data
YMHA Young Men's Hebrew Association
HMV Acronym of His Master's Voice
HS1 (rail transport
UK
) High Speed 1, a high speed railway line between London and the Channel Tunnel
ESFJ (psychology) extraverted, sensing, feeling and judging: a personality type in the Myers-Briggs type indicator
FedRAMP Initialism of federal (a U.S. government program that provides a standardized approach to security assessment, authorization, and continuous monitoring for cloud computing services used by the federal government)
UDA Ulster Defense Association
IOM (US) Institute of Medicine
SMPS (electronics) Switching Mode Power Supply.
JSLC (space flight
PRC
) Initialism of Jiuquan satellite
BGP Border Gateway Protocol
PSDP (Pakistan) Public Sector Development Programme, a function of the Planning Commission of Pakistan.
DEP (US
military
) delayed entry program (allows a recruit to complete education before joining the military)
EBCT (medicine) Initialism of Electron beam computed tomography
AM (Sometimes lower case) From ante meridiem, meaning "before noon (12:00)".
HMVS (obsolete) Her Majesty's Victorian Ship. A designation for ships from Victoria, Australia.
HS3 (aeronautics
NASA
meteorology
) Initialism of hurricane (A project launched in August 2012 to observer hurricanes)
UDAA Unlawfuly Driving Away of an Automobile
BCNU (chemistry) Bis-chloroethylnitrosourea (also called carmustine).
CYO Catholic Youth Organization
DCOM (computing) Distributed Component Object Model
PSDU (telecommunication) Physical Layer Service Data Unit.
DYOFDW (internet slang) Do your own fucking dirty work.
EBCTA (medicine) Initialism of Electron beam computed tomography angiography
ESFP (psychology) extraverted, sensing, feeling and perceiving: a personality type in the Myers-Briggs type indicator
ASPI Advanced SCSI Peripheral Interface
TT tuberculin tested (a quality of milk in post-war Britain)
MPs Plural of MP: Members of Parliament.
BCOF 'British Commonwealth Occupation Force' . (occupied Japan 1946 - 1952)
JSP (software) Initialism of w:JavaServer Pages
SPB (computing) Shortest Path Bridging (SPB); IEEE standard 802.1aq.
NOAD New Oxford American Dictionary.
DCPM data centre predictive modelling
SSCC (computing) Initialism of Space Weather Coordination Centre (ESA’s centre for space weather at the Space Pole in Belgium)

Note: these words have been obtained from Wiktionary and have been classified and improved through automated computer linguistics processes.

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