(Main list of acronyms)

__NOTOC__

  • c – (s) Centi
  • C – (s) Carbon – Coulomb – One Hundred (in Roman numerals)

C0–9

  • C2 or C<sup>2</sup> – (i) Command and Control
  • c2c – (s) the British rail company formerly known as LTS Rail
  • C2C
  • (p) Coast to Coast Athletic Conference
  • Consumer-To-Consumer electronic commerce
  • Cam-To-Cam internet chat
  • C2D or C<sup>2</sup>D – (i) Intel Core 2 Duo
  • C2IEDM or C<sup>2</sup>IEDM – (i) Command and Control Information Exchange Data Model
  • C2IS or C<sup>2</sup>IS – (i) Command and Control Information System
  • C2PC or C<sup>2</sup>PC – (i) Command and Control Personal Computer
  • C2V or C<sup>2</sup>V – (i) Command and Control Vehicle
  • C2W or C<sup>2</sup>W – (i) Command and Control Warfare
  • C3 or C<sup>3</sup>
  • (i) Colorectal Cancer Condition
  • Command, Control, and Communications
  • C3I or C<sup>3</sup>I – (i) Command, Control, Communications, and Intelligence
  • C4 or C<sup>4</sup> – (i) Command, Control, Communications, and Computers
  • C4I or C<sup>4</sup>I – (i) Command, Control, Communications, Computers, and Intelligence
  • C4ISR or C<sup>4</sup>ISR – (i) Command, Control, Communications, Computers, Intelligence, Surveillance and Reconnaissance

CA

  • ca – (s) Catalan language (ISO 639-1 code)
  • Ca – (s) Calcium
  • CA
  • (s) California (postal symbol)
  • Canada (FIPS 10-4 country code; ISO 3166 digram)
  • Catalonia
  • (i) Civil Affairs
  • Close Armour
  • Cocaine Anonymous
  • Computer Associates
  • Counter-Air
  • Cricket Australia
  • CAA
  • (i) 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
  • Coastal Athletic Association or its former name of Colonial Athletic Association
  • CAAT
  • (i) or (a) Campaign Against Arms Trade
  • Center for Alternatives to Animal Testing
  • CAB – Civil Aeronautics Board
  • CABB (p/i) – Confederación Argentina de Básquetbol (Spanish, "Argentine Basketball Confederation")<!--"Básquetbol" is specific to Rioplatense Spanish. In most other Spanish dialects, "basketball" is "baloncesto".-->
  • CAC
  • (i) California Association of Criminalists
  • [[Chronic Asymptomatic Carrier|Chronic Asymptomatic [Disease] Carrier]]
  • CACM
  • (i) Central American Common Market
  • (i) Communications of the ACM
  • CAD
  • (s) Canadian dollar (ISO 4217 currency code)
  • (a) Computer-Aided Design
  • Computer-Aided Dispatch
  • Cpplint Anxiety Disorder - (a) Condition suffered by software developers who worry about whether they've left any whitespace on the end of a line
  • CADCAM – (a) Computer-Aided Design/Computer-Aided Manufacturing
  • CADMID – (a) Concept, Assessment, Demonstration, Manufacture, In service, Disposal (life cycle mnemonic)
  • CADPAT – (p) CAnadian Disruptive PATtern
  • CADT – Child/Adolescent Day Treatment
  • CAE
  • (i) Canadian Aviation Electronics (originally)
  • Certificate in Advanced English
  • CAEn – (i/a) Close Action Engagement (constructive simulation)
  • CAF
  • (s) Central African Republic (ISO 3166 trigram)
  • (i) Confederation of African Football (or French Confédération Africaine de Football)
  • CAFAD – (a) Combined Arms For Air Defence
  • CAFDE
  • (a) Canadian Association of Film Distributors and Exporters
  • Computer Aided Federation Development Environment
  • CAFE – (a) Corporate Average Fuel Economy standard
  • CAI – (i) Computer Assisted Instruction
  • CAIR – (i) Council on American-Islamic Relations
  • Calabarzon – (p) A region in the Philippines: CAvite, LAguna, BAtangas, Rizal, queZON
  • CALL – (a) (U.S.) Center for Army Lessons Learned
  • CALM – (p) Communications, Air-interface, Long and Medium range
  • CalPERS – (p) California Public Employees' Retirement System
  • CalSTRS – (p) California State Teachers' Retirement System
  • Caltrans – (p) California Department of Transportation
  • CAM
  • (a) Chemical Agent Monitor
  • Complementary and alternative medicine
  • Computer-Aided Manufacturing
  • Crassulacean acid metabolism (type of photosynthesis)
  • CAMRA – (p) CAMpaign for Real Ale
  • CAN – (s) Canada (ISO 3166 trigram)
  • CANA – (a) Convulsive Antidote, Nerve Agent
  • CANDU – (p) CANada Deuterium Uranium (nuclear reactor design)
  • Canola – (p) Canadian oil, low acid (referring to a specific cultivar of rapeseed bred to have a low erucic acid content)
  • CAP
  • (i) Combat Air Patrol
  • Civil Air Patrol
  • Common [Operating/Operational] Air Picture
  • Crisis Action Procedures
  • Common Agricultural Policy (European Union)
  • CAPES
  • (p) CAPability Evaluation System
  • (a) Combined Arms Planning and Execution System
  • CAPTCHA – Completely Automated Public Turing test to tell Computers and Humans Apart
  • CAQ – (i) Coalition Avenir Québec (French, "Coalition for Québec's Future"; political party in that Canadian province)
  • CARB (i) – California Air Resources Board
  • CARE
  • (a) Citizens Association for Racial Equality (former New Zealand organisation)
  • (p) Community database on Accidents on the Roads in Europe
  • (a) Cooperative for Aid and Relief Everywhere (originally Cooperative for American Remittances to Europe)
  • CARMONETTE – (p) Computerized Monte Carlo Simulation
  • CARP – (a) Computed Air Release Point
  • CART – (a) Championship Auto Racing Teams (now defunct)
  • CAS
  • (i) Chemical Abstracts Service
  • Chief of the Air Staff
  • Close Air Support
  • CASA –(a) Civil Aviation Safety Authority
  • CASE
  • (a) Cellular ammunition storage equipment
  • Computer-Aided Software Engineering
  • CASS – (a) Command Activated Sonobuoy System
  • CASTFOREM – (p) Combined Arms and Support Task Force Evaluation Model
  • CASTOR – (a) Canadian Automatic Small Telescopes for Orbital Research
  • cat – (s) Catalan language (ISO 639-2 code)
  • CAT
  • (a) Community Acceptance Testing
  • Computer-Assisted (or Axial) Tomography
  • CATK – (p) Counterattack
  • CATS – (a) Computer Active Technology Suspension
  • CATT – (a/i) Combined Arms Tactical Trainer
  • CAV – (p) Cavalry
  • CAVE - Citizens Against Virtually Everything
  • CAVOK – (p) Ceiling And Visibility OK ("Kav-okay")
  • CAW – (i) Canadian Auto Workers (trade union)

CB

  • CB
  • (i) Citizens' Band radio
  • (s) Cambodia (FIPS 10-4 country code)
  • CBASSE – (a) Commission on Behavioral And Social Sciences and Education ("sea bass")
  • CBC
  • (i) Canadian Broadcasting Corporation
  • Christmas Bird Count
  • Cipher-Block Chaining
  • Cornering Brake Control
  • CBE
  • (i) Commander of the Order of the British Empire
  • Cab Beside Engine (see truck)
  • CBF – (i) Confederação Brasileira de Futebol (Portuguese, "Brazilian Football Confederation")
  • CBGB – (i) Country, Blue Grass, and Blues (former New York City nightclub)
  • CBLA – (i) Comparative bullet lead analysis
  • CBN – CardsApp Brand Number
  • CBM – many, including Canadian Baptist Ministries and Commodore Business Machines; see entry
  • CBML – (i) Coalition Battle Management Language
  • CBOL – (i) Consortium for the Barcode of Life
  • CBOT – (i) Chicago Board of Trade
  • CBP – (i) (U.S.) Customs and Border Protection
  • CBR – (i) Case-Based Reasoning
  • CBRE
  • (i) Canadian Brotherhood of Railway Employees
  • Certified broadcast radio engineer (U.S. professional certification)
  • Chemical, Biological, Radiological and Explosive Defence Group (Singapore)
  • Coldwell Banker Richard Ellis
  • CBRN – (i) Chemical, Biological, Radiological, or Nuclear (weapon or event)
  • CBRNE – (i) Chemical, Biological, Radiological, Nuclear or [high-yield] Explosive (weapon or event)
  • CBS
  • (i) Columbia Broadcasting System
  • Corps Battle Simulation
  • CBT
  • (i) Cock and Ball Torture
  • (i) Cognitive Behaviour Therapy
  • (i) Closed Beta Test
  • (p) Combat
  • CBUS – (i) Columbus, Ohio

CC

  • CC – many, including carbon copy; see entry
  • CCA – (i) Counter Command Activity
  • CCC
  • CCC - (p/i) Coricidin Cough & Cold
  • CCC
  • (i) Canterbury Clothing Company
  • Civilian Conservation Corps (U.S., 1930s and 1940s)
  • Corpus Christi College, Oxford
  • CCCAA – (p/i) California Community College Athletic Association (usually pronounced "3C-2A")
  • CCCP
  • (i) Central Committee of the Communist Party
  • Cyrillic for SSSR (Soyuz Sovetskikh Sotsialisticheskikh Respublik, Russian Союз Советских Социалистических Республик, Union of Soviet Socialist Republics)
  • CCD
  • (i) Charge-Coupled Device
  • Confraternity of Christian Doctrine (Catechism)
  • CCF – (i) Cartoon Cartoon Fridays
  • CCG
  • (i) Canadian Coast Guard
  • Collectible Card Game
  • CCGC
  • (i) Canadian Coast Guard Cutter
  • Canadian Coast Guard College
  • CCGH – (i) Canadian Coast Guard Hovercraft
  • CCGS
  • (i) Canadian Coast Guard Ship
  • Christ Church Grammar School
  • CCH – (i) Computer-Controlled Hostile
  • CCIF – (p) 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)
  • CCII
  • (i) Command and Control Information Infrastructure
  • Community Capital Investment Initiative
  • CCIR
  • (i) 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 requirement
  • CCIT – (p) Comité consultatif international télégraphique (French for International Telegraph Consultative Committee, merged with the CCIF in 1956 to form the CCITT)
  • CCITT – (p) Comité consultatif international téléphonique et télégraphique (French for International Telegraph and Telephone Consultative Committee, became the ITU Telecommunication Standardization Sector, ITU-T, in 1992)
  • CCK
  • (p) Cholecystokinin
  • (s) Cocos (Keeling) Islands (ISO 3166 trigram)
  • CCM
  • (i) 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
  • Cape Cod Mall
  • CCOC
  • (i) Canadian Children's Opera Chorus
  • CCOP – (i) Coalition Common Operating/Operational Picture
  • CCP
  • (i) Casualty Collection Point
  • Communications Checkpoint
  • Contingency Communications Package
  • CCPA – (i) Consumer Credit Protection Act
  • CCR
  • (i) Covenants, conditions, and restrictions (related to real estate, especially in the US)
  • Creedence Clearwater Revival
  • CCRAp – (p) Canadian Conservative Reform Alliance party
  • CCRP – (i) Command and Control Research Program
  • CCRTS – (i) Command and Control Research and Technology Symposium
  • CCSCS – (a) Coordinadora de Centrales Sindicales del Cono Sur
  • CCSCS – (i) Consultative Committee for Space Data Systems
  • CCSIL – (i) Command and Control Simulation Interface Language ("cecil")
  • CCSK – (i) Cyclic Code Shift Keying
  • CCT – (i) Current Commitments Team
  • CCTT – (i) Close Combat Tactical Trainer

CD

  • cd – (s) Candela
  • Cd – (s) Cadmium
  • CD – many, including Compact Disc; see entry
  • CD1 – (i) Cluster of Differentiation 1 (a small gene family)
  • CDA – (i) UK Centre for Defence Analysis
  • CDC
  • (i) Centers for Disease Control and Prevention (originally (U.S.) Communicable Disease Center)
  • Control Data Corporation
  • Cult of the Dead Cow
  • CDD – (i) Capabilities Development Document
  • CDE – (i) Chemical Defence Equipment
  • CDEC – (i) U.S. Combat Development Experimentation Center
  • CDF
  • (i) California Department of Forestry [and Fire Protection]
  • Common Data Format
  • (s) Democratic Republic of Congo franc congolais (ISO 4217 currency code)
  • CDIAC – (a) Carbon Dioxide Information Analysis Center ("see-dee-ack")
  • CDipAF – (i) Certified Diploma in Accounting and Finance
  • CDL – (i) Commercial driver's license
  • CDM
  • (i) Clean Development Mechanism (Kyoto protocol)
  • Cold Dark Matter (astronomy)
  • CDMA – (i) Code Division Multiple Access
  • CDMO – (i) Contract Development & Manufacturing Organizations
  • CDMSII – (p) Cryogenic Dark Matter Search&nbsp;II
  • CDMX – (p) Ciudad de México, the Spanish name of Mexico City
  • Cdr – (p) Commander
  • CDS
  • (i) Chief of the Defence Staff
  • Credit default swap
  • Cdt – (p) Commandant
  • CDT – (i) Central Daylight Time (UTC−5 hours)

CE

  • ce – (s) Chechen language (ISO 639-1 code)
  • Ce – (s) Cerium
  • CE – many, including Christian/Common Era (cf. AD); see entry
  • CEA – (i) Campaign Effectiveness Analysis
  • CECOM – (p) U.S. Army Communications and Electronics Command
  • CECOT – (p) Centro de Confinamiento del Terrorismo (Spanish, "Terrorism Confinement Center"), maximum-security prison in El Salvador
  • CEDEX – (p) Courrier d'entreprise à distribution exceptionnelle (French, "Company Mail with Exceptional Distribution"; "exceptional" refers to the volume of mail)
  • CEGEP – (p) Collège d'enseignement général et professionnel (French, "College of General and Vocational Education")
  • CEI – (i) Competitive Enterprise Institute
  • CENTCOM – (p) United States Central Command
  • CENTO – (a) Central Treaty Organization (Baghdad Pact)
  • CENZUB – (p) Centre d'entraînement aux actions en zone urbaine (French, "Urban Operations Training Centre")
  • CEO – (i) Chief Executive Officer
  • CEP – (i) Circular Error Probable
  • CEPT – (a/i) Conférence européenne des administrations des postes et des télécommunications (French, "European Conference of Postal and Telecommunications Administrations")
  • CERCLA – (a) U.S. Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (Superfund)
  • CERDEC – U.S. Communications-Electronics Research, Development and Engineering Center
  • CERGA – (a) Centre de recherches en géodynamique et astrométrie (French, "Astrometry and Geodynamics Research Centre")
  • CERN – (a) Centre européen pour la recherche nucléaire (French, "European Organization for Nuclear Research")
  • CERT – (a) Computer Emergency Response Team
  • ces – (s) Czech language (ISO 639-2 code)
  • CESS – (i) Centre for Earth Science Studies (India)
  • CEV
  • (i) Combat Engineer Vehicle
  • Confédération européenne de volleyball (French, "European Volleyball Confederation")
  • Crew Exploration Vehicle
  • CEWC – (a/i) Council for Education in World Citizenship

CF

  • cf. – (i) confer (Latin "compare", or "see also")
  • Cf – (s) Californium
  • CF
  • (i) Canadian Forces
  • (s) Central African Republic (ISO 3166 digram)
  • (s) Consolidated Freightways
  • Republic of the Congo (FIPS 10-4 country code)
  • CFA
  • (i) Cat Fanciers' Association
  • Chartered Financial Analyst
  • College Football Association (former consortium of US major college football conferences)
  • Color Filter Array
  • County Fire Authority
  • Covering Force Area
  • CFAR
  • (i) Christine's
  • Federal Acquisition Regulation
  • CFC
  • (i) ChloroFluoroCarbon
  • Canadian Fish Company
  • CFE – (i) Constitution for the Federation of Earth
  • CFES – (a) Continuous Flow Electrophoresis System
  • CFFZ – (i) Call For Fire Zone
  • CFG
  • (i) Context-free grammar
  • Control-flow graph
  • CFHT – (i) Canada–France–Hawaii Telescope
  • CFI – (i) Center for Inquiry (CSICOP)
  • CFL
  • (i) Canadian Football League
  • Co-ordinated Fire Line
  • CFLCC – (i) Coalition Forces Land Component Command
  • CFM – (i) Certified Facilities Manager [(IFMA)]http://www.ifma.org/
  • CFO – (i) Chief Financial Officer
  • CFP
  • (i) Call for papers
  • College Football Playoff
  • Common Fisheries Policy (EU)
  • CFR
  • (i) Code of Federal Regulations
  • Căile Ferate Române (Romanian, "Romanian Railways")
  • CFRP – (i) Carbon fibre reinforced plastic
  • CFS – (i) Chronic Fatigue Syndrome
  • CFSP – (i) Common Foreign and Security Policy
  • CFU – (i) Colony Forming Unit(s) in Microbiology
  • CFV – (i) Cavalry Fighting Vehicle
  • CFZ – (i) Critical Friendly Zone

CG

  • CG – (i) Client Group – Computer Graphics – Controls Group – (s) Democratic Republic of the Congo (FIPS 10-4 country code) – Republic of the Congo (ISO 3166 digram)
  • CGDC – (i) Computer Game Developers Conference (became GDC in 1998)
  • CGF – (i) Computer-Generated Forces (Simulation)
  • CGH – (i) Comparative Genomic Hybridisation
  • CGIG – (i) Cross-Government Implementation Group
  • CGM – (i) Computer Graphics Metafile
  • CGO – (s) Republic of the Congo (IOC and FIFA trigram, but not ISO 3166)
  • CGS – (i) Chief of the General Staff
  • CGSI – Consumer Guidance Society of India
  • CGT – (i) Capital Gains Tax

CH

  • ch – (s) Chamorro language (ISO 639-1 code)
  • ch – ch(L) is used to denote the Chern character of a line bundle
  • CH
  • (p) Chieftain tank
  • (s) China (FIPS 10-4 country code)
  • Switzerland (ISO 3166 digram; from Latin Confoederatio Helvetica)
  • cha – (s) Chamorro language (ISO 639-2 code)
  • CHAMPUS – (a) (U.S.) Civilian Health and Medical Program of the Uniformed Services (now known as TRICARE)
  • CHAOS – (a) Cambridge Heart Anti-Oxidant Study
  • CHAPS – (a) Clearing House Automated Payment System
  • CHDK – (i) Canon Hack Development Kit (Canon camera firmware hack)
  • che – (s) Chechen language (ISO 639-2 code)
  • CHE – (s) Switzerland (ISO 3166 trigram; from Latin Confoederatio Helvetica)
  • CHF – (s) Swiss franc (ISO 4217 currency code)
  • CHI
  • Catholic Health Initiatives (US hospital network)
  • (s) Chile (IOC and FIFA trigram, but not ISO 3166)
  • (i) Columbia Helicopters, Inc
  • Computer-Human Interaction
  • CHiP – (a) California Highway Patrol
  • CHIPS – (a) Cosmic Hot Interstellar Plasma Spectrometer
  • CHL – (s) Chile (ISO 3166 trigram)
  • CHLA – (a) Core Historical Literature of Agriculture
  • CHN – (s) China (ISO 3166 trigram)
  • CHOGM – (a) Commonwealth Heads of Government Meeting
  • CHP
  • (i) California Highway Patrol
  • Combined Heat and Power
  • CHPSO – (a) California Hospital Patient Safety Organization
  • CHRS – Canadian Heart Rhythm Society
  • CHS – (i) Combat Health Support
  • CHT – (i) Certified Hand Therapist
  • chu – (s) Old Church Slavonic language (ISO 639-2 code)
  • chv – (s) Chuvash language (ISO 639-2 code)
  • CREN – (p) Christian Real Estate Network Real Estate Association

CI

  • Ci – (s) Curie
  • CI
  • (s) Chile (FIPS 10-4 country code)
  • Côte d'Ivoire (ISO 3166 digram)
  • (i) Counter-Intelligence
  • 101 (in Roman numerals)
  • CIA
  • (i) Cairo International Airport
  • Central Intelligence Agency
  • Cru' in Action
  • Culinary Institute of America
  • CIAO
  • (i) Critical Infrastructure Assurance Office
  • Component-Integrated ACE ORB
  • CIB – (i) Complete In Box (Internet auction/trading listings)
  • CIBC – (i) Canadian Imperial Bank of Commerce
  • CICS – (a) Customer Information Control System (IBM mainframe software; "kicks" or "C-I-C-S")
  • CID
  • (i) Certified Interior Designer (New York State professional licensing designation)
  • (p) Combat Identification
  • (i) Criminal Investigation Division
  • Criminal Investigations Department
  • CIÉ – (i) Commission internationale de l'éclairage
  • CIEF – (i) Comité international d'enregistrement des fréquences (International Frequency Registration Board)
  • CIF
  • (i) California Interscholastic Federation (high school sports governing body)
  • Cost, Insurance, and Freight (Paid) (shipping)
  • CIMIC – (p) Civil-Military Co-operation
  • CIMMYT – (a/i) Centro Internacional de Mejoramiento de Maíz Y Trigo (Spanish, "International Maize and Wheat Improvement Center")
  • CINC – (p) Commander in Chief
  • CINEOS – (a) Campo Imperatore Near-Earth Object Survey
  • CIO
  • (i) Chief information officer
  • Congress of Industrial Organizations
  • CIP – (a) Combat Identification Panel
  • CIPE – (i) (European) Centre for International Political Economy
  • CIR – (i) (Commander's) Critical Information Requirements
  • CIR – (s) Corotating Interaction Region
  • CIS
  • (i) Canadian Interuniversity Sport, a former name of the organization now known as U Sports
  • Commonwealth of Independent States
  • Command and Information System
  • Communication and Information System
  • CISA – (a) (U.S.) C4I Integration Support Activity
  • CISB – (i) Complete In Sealed Box (Internet auction/trading listings)
  • CISPR – (i) Comité international spécial des perturbations radioélectriques (Special International Committee on Radio Interference)
  • CISSP – (i) Certified Information Systems Security Professional
  • CITES – (p) Convention on International Trade in Endangered Species (of Wild Fauna and Flora) ("sigh-tease")
  • CITS – (i) Combat Identification Training System
  • CIV – (s) Côte d'Ivoire (ISO 3166 trigram)
  • CIVETS – (a) Colombia, Indonesia, Vietnam, Egypt, Turkey, South Africa (economics)
  • CIVPOP – (p) Civilian Population
  • CIWS – (i) Close-In Weapon System

CJ

  • CJ
  • (s) Cayman Islands (FIPS 10-4 country code)
  • (i) Criminal Justice
  • CJC
  • (i) Canadian Jewish Congress
  • Cold Junction Compensation
  • CJD
  • (i) Chronological Julian Day
  • Creutzfeldt–Jakob disease
  • CJCS – (i) Chairman of the Joint Chiefs of Staff
  • CJO – (i) Chief of Joint Operations
  • CJTF – (i) Combined Joint Task Force

CK

  • CK
  • (s) Cocos (Keeling) Islands (FIPS 10-4 country code)
  • (s) Cook Islands (ISO 3166 code)
  • CKA - (i) Commonly known as
  • CKND – (i) Codename: Kids Next Door

CL

  • Cl – (s) Chlorine
  • CL – (s) Chile (ISO 3166 digram) – (i) Co-ordination Line – One Hundred and Fifty (in Roman numerals)
  • CLA – (i) Clutterers Anonymous
  • CLEC – (i) Competitive Local Exchange Carrier
  • CLEMARS – (a) California Law Enforcement Mutual Aid Radio System
  • CLI – (i) Command Line Interface/Interpreter
  • CLIC – (p) Compact LInear Collider
  • CLO – (i) Cornell Lab of Ornithology
  • CLOB – (p) Character Large OBject
  • CLOS – (i) Command to Line-Of-Sight (missile control system)
  • CLOS – (a) Common Lisp Object System
  • CLP – (s) Chilean peso (ISO 4217 currency code) – (i) Common [Operating/Operational] Land Picture
  • CLPFC – (i) CentroLateral PreFrontal Cortex
  • CLRP – (a) College Loan Repayment Program

CM

  • Cm – (s) Curium
  • CM
  • (s) Cameroon (FIPS 10-4 country code; ISO 3166 digram)
  • (i) Cruise Missile
  • (s) Nine Hundred (in Roman numerals)
  • CMA
  • (i) U.S. Chemical Materials Agency
  • Country Music Association (also used to refer to the organization's annual awards)
  • Crystal Meth Anonymous
  • CMB – (i) Cosmic Microwave Background
  • CMBR – (i) Cosmic Microwave Background Radiation
  • CME – (a) Coronal Mass Ejection (usually Sun)
  • CMHC – (i) Canada Mortgage and Housing Corporation
  • CMIIAW – (i) Correct me if I am wrong
  • CMIS
  • (a) Content Management Interoperability Services
  • Common management information service
  • CMJ – (i) Christopher Martin-Jenkins (BBC sports commentator)
  • CML
  • (p) Chemical
  • (i) Chronic Myelogenous Leukemia (formerly Chronic Myeloid Leukemia)
  • CMLL – (i) Consejo Mundial de Lucha Libre (Spanish, "World Wrestling Council"—Mexican professional wrestling promotion)
  • CMM – (i) Capability Maturity Model
  • CMMC – (i) Corps Materiel Management Centre
  • CMML
  • (i) Chronic MyeloMonocytic Leukemia
  • Continuous Media Markup Language
  • CMO – (i) Civil-Military Operations
  • CMOC – (i) Civil-Military Operations Centre
  • CMOS
  • (i) Canadian Meteorological and Oceanographic Society
  • (The) Chicago Manual of Style
  • Complementary Metal Oxide Semiconductor
  • CMP – (i) Common [Operating/Operational] Maritime Picture
  • CMP – (i) Canadian Military Pattern truck (World War II)
  • CMPD
  • (i) Chronic Myeloproliferative Disease
  • (i) Charlotte-Mecklenburg Police Department
  • (i) Costa Mesa Police Department
  • CMR
  • (s) Cameroon (ISO 3166 trigram)
  • (i) Coaxial Main Rotors (helicopter type)
  • CMS
  • (i) Centers for Medicare and Medicaid Services
  • The Chicago Manual of Style
  • CMT – (i) Country Music Television
  • CMU
  • (i) Carnegie Mellon University
  • Central Michigan University
  • Concrete Masonry Unit
  • CMW
  • (i) 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)
  • CMYK – (i) Cyan Magenta Yellow Key/blacK (color model)

CN

  • CN
  • (i/s) Canadian National (railway; also the AAR reporting mark for said company)
  • (s) China (ISO 3166 digram)
  • Comoros (FIPS 10-4 country code)
  • CNA
  • (i) 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
  • CNBC – (a/i) Consumer News and Business Channel
  • CND
  • (i) Campaign for Nuclear Disarmament
  • Computer Network Defence
  • CNE
  • (i) Canadian National Exhibition
  • Computer Network Exploitation
  • Certified Network Engineer
  • CNES – (i) Centre national d'études spatiales (French, "National Centre for Space Studies")
  • CNF – (p) Cost and Freight
  • CNI – (i) Communications, Navigation and Identification
  • CNI – (a) Clinical Nursing Intern
  • CNN
  • (i) Cable News Network
  • Cellular Nonlinear Network
  • CNO – (i) Computer Network Operations
  • CNR
  • (i) Canadian National Railway
  • Combat Net Radio
  • CNV – (i) Copy-Number Variable (genetics)
  • CNY – (s) Chinese yuan renminbi (ISO 4217 currency code)

CO

  • c/o – (i) care of (postal code indicating temporary address change)
  • co – (s) Corsican language (ISO 639-1 code)
  • Co – (s) Cobalt
  • Co. – Company
  • CO – many, including Central Office (phone company); see entry – (s) Colorado (postal symbol) – (i) Commanding Officer (military)
  • COA – (i) Certificate/Concept Of Analysis – Course Of Action (military)
  • COB – (i) Close Of Business [day]
  • COBOL (p) – COmmon Business-Oriented Language
  • COBRA – Consolidated Omnibus Budget Reconciliation Act of 1985
  • COCOM – (p) Combatant Command (military)
  • COD – (i) Cash On Delivery – (s) Democratic Republic of the Congo (ISO 3166 trigram)
  • CoDA – (i) Co-Dependents Anonymous
  • codec – (p) Coder-Decoder / Compressor-Decompressor / Compression-Decompression algorithm
  • COE – (i) Cab Over Engine (see truck) – Common Operating Environment (military)
  • COEA – (i) Cost Operational Effectiveness Analysis (military)
  • COEIA – (i) Combined Operational Effectiveness and Investment Appraisal (military)
  • C of I – (i) Certificate of Indebtedness (financial) – (i) The College of Idaho
  • COFT – (i) Conduct Of Fire Trainer (military)
  • COG – (i) Centre Of Gravity – Current Operations Group (military) – (s) Republic of the Congo (ISO 3166 trigram)
  • COGENT – (a) Cognitive Objects within a Graphical EnviroNmenT
  • COIL – (a) Chemical Oxygen Iodine Laser
  • COIN – (p) Counter-Insurgency (military)
  • COK – (s) Cook Islands (ISO 3166 trigram)
  • COL
  • (s) Colombia (ISO 3166 trigram)
  • (i) Cost of Living
  • COLA – (a) comp.os.linux.announce – Cost Of Living Adjustment
  • COLT – (a) Combat Observation and Lasing Team (military)
  • COM – (s) Comoros (ISO 3166 trigram) – (a) Component Object Model
  • COMECON – (p) Council for Mutual Economic Assistance (economic counterpart of the Warsaw Pact, 1949–1991)
  • COMLEX-USA – (p/a) Comprehensive Osteopathic Medical Licensing Examination of the United States (of America); "COMLEX" typically pronounced as a single word, with "USA" spelled out
  • COMMZ – (p) Communications Zone (military)
  • COMSEC – (p) Communications Security (military)
  • CONAD – (p) U.S. Continental Air Defense Command
  • CONCACAF – (a) Confederation Of North, Central American and Caribbean Association Football
  • CONMEBOL – (p) Confederación Sudamericana de Fútbol or Confederação Sul-Americana de Futebol (respectively Spanish and Portuguese for "South American Football Confederation")
  • CONOPS – (p) Concept of Operations (military)
  • CONUS – (p) Continental United States
  • COO – (i) Chief Operating Officer
  • COP – (s) Colombian peso (ISO 4217 currency code) – (a) Common Operating/Operational Picture
  • COPD –(i) Chronic obstructive pulmonary disease
  • COPE – (a) U.K. Committee On Publication Ethics
  • COPUS – (p) U.K. Committee on the Public Understanding of Science
  • cor – (s) Cornish language (ISO 639-2 code)
  • CORBA – (a) Common Object Request Broker Architecture
  • CORD – (i/a) Common Operational Requirements Document
  • CORE – (a) Consortium for Oceanographic Research and Education
  • CORG – (i) (U.S.) Combat Operations Research Group
  • COROT – (p) COnvection, ROtation and planetary Transits
  • cos – (s) Corsican language (ISO 639-2 code) – Cosine
  • COS – (i) Cooper Ornithological Society
  • COSCOM – (p) Corps Support Command (military)
  • COSER – (p) COoperative SERvice
  • COSHH – (p) Control Of Substances Hazardous to Health (United Kingdom)
  • CoSIDA – (p) College Sports Information Directors of America, the original name of the organization now known as College Sports Communicators
  • CoT – (i) Car of Tomorrow (former NASCAR race car design)
  • COTS – (a) Commercial Off The Shelf
  • COVID-19 – Coronavirus disease 2019
  • Coy – (s) Company (military unit)Cow

CP

  • CP
  • (i) Canadian Pacific
  • Check Point
  • Command Post
  • Club Penguin
  • CPA – (i) Certified Public Accountant
  • CPAC
  • (p) Conservative Political Action Conference
  • Cable Public Affairs Channel ("see-pack")
  • CPAP
  • (i) Center for Public Administration and Policy
  • Coalition for the Prevention of Alcohol Problems
  • Consecutive primes in arithmetic progression
  • (p) Continuous positive airway pressure ("see-pap")
  • CPC – Certified Professional Coder, a certification from AAPC
  • CPCU – Certified Property Casualty Underwriter
  • CPD – (i) Capabilities Production Document
  • CPE
  • (i) Certificate of Proficiency in English
  • Certified Professional Ergonomist
  • (i) Clinical Pastoral Education
  • CPEC – (p) China–Pakistan Economic Corridor ("see-pec")
  • CPF
  • (i) Calibration Parameter File
  • Canadian Patrol Frigate
  • CPG – (a) Clinical Practice Guideline
  • CPI – (i) CERDEC Command, Power and Integration
  • CPIM – (a) Certification on Production and Inventory Management
  • CPIR – Computationally-Private Information Retrieval
  • CPON – (i) Certified Pediatric Oncology Nurse
  • CPPCC – (i) Chinese People's Political Consultative Conference
  • CPR
  • (i) Canadian Pacific Railway
  • (i) Cardiopulmonary resuscitation
  • CPS
  • Crown Prosecution Service (UK government agency)
  • Child Protection Service (Collection of US government agencies)
  • CPSM – (i) Continuous Phase Shift Modulation
  • CPSU – (i) Communist Party of the Soviet Union
  • CPT – (i) Contingency Planning Team
  • CPU
  • (i) Central Processing Unit
  • Contract Postal Unit
  • CPV – (s) Cape Verde (ISO 3166 trigram)
  • CPX – (p) Command Post eXercise

CQ

  • CQ – (i) Carrier Qualification – Central Queensland – Charge of Quarters – Congressional Quarterly – Constellation Airlines (IATA airline designator) – Northern Mariana Islands (FIPS 10-4 territory code)
  • CQD – (i) Close Quarters Drill (Morse distress code preceding SOS: CQ "calling all stations", D "Distress"; often incorrectly interpreted as "Come Quick, Distress")

CR

  • cr – (s) Cree language (ISO 639-1 code)
  • Cr – (s) Chromium
  • CR
  • (s) Coral Sea Islands (FIPS 10-4 territory code)
  • Costa Rica (ISO 3166 digram)
  • CRAM – (i) Combined Radiometric Correction Model
  • [C.R.A.P. (acronym) Citizens Raging Against Phones] Group of people on GTA III (PS2)]
  • CRC
  • (i) Central RTI Component
  • Chemical Rubber Company
  • Christian Reformed Church
  • Control and Reporting Centre
  • Cyclic Redundancy Check
  • (s) Costa Rican colón (ISO 4217 currency code)
  • Costa Rica (IOC and FIFA trigram, but not ISO 3166)
  • CRD – (i) Capstone Requirements Document
  • cre – (s) Cree language (ISO 639-2 code)
  • C.R.E.A.M. –Cash Rules Everything Around Me
  • CREB – (a) Cyclic AMP-response Element Binding (protein)
  • CREEP – (a) Committee for the Re-Election of the President, a pejorative nickname used by opponents
  • CRI
  • (a) China Radio International
  • (s) Costa Rica (ISO 3166 trigram)
  • CRIPL – (i) Consolidated Remain-In-Place List
  • CRISPR – (a) clustered regularly interspaced short palindromic repeats
  • CRM – (i) Cardiac Rhythm Management – Customer Relationship Management
  • CRO – (s) Croatia (IOC and FIFA trigram, but not ISO 3166) – Contract Research Organization
  • CRP
  • (i) Committee for the Re-Election of the President
  • Control and Reporting Post
  • CRT
  • (i) Cardiac Resynchronization Therapy
  • Cathode-Ray Tube
  • Chinese Remainder Theorem
  • CRTC – (i) Canadian Radio-television and Telecommunications Commission
  • [CWAJGA? (disambiguation) Can't We All Just Get Along?] Used in the 90s & early 2000s to resolve or stop arguments and disagreements between people

CS

  • cs – (s) Czech language (ISO 639-1 code)
  • Cs – (s) Caesium
  • CS
  • (i) Combat Support
  • Computer Scientist
  • Counter-Strike
  • (s) Costa Rica (FIPS 10-4 country code)
  • Serbia and Montenegro (ISO 3166 digram; obsolete since 2006)
  • CSA
  • (i) Canadian Soccer Association
  • Canadian Space Agency
  • Canadian Standards Association
  • Chief Scientific Advisor
  • Child Support Agency
  • Command Staff Advisor
  • Community-supported agriculture
  • Confederate States of America
  • Corps Storage Area
  • (p) Czech Airlines
  • C/S/A – (i) CINC, Service, and Agency
  • CSAR – (p) Combat Search and Rescue ("seessar")
  • CSC
  • (i) Closed Spacelike Curve (relativity)
  • College Sports Communicators (U.S. organization for college sports information directors)
  • Compact system camera
  • Computer Sciences Corporation (became DXC Technology in 2017)
  • Computer Security Centre
  • CSCC - Canadian Society of Clinical Chemists
  • CSEAL – (i/a) Combat Systems Engineering and Analysis Laboratory ("see-seal")
  • CSERIAC – (p) (U.S. DoD) Crew Systems Ergonomics Information Analysis Center
  • CSG – (i) Corps Support Group
  • CSI – see entry
  • CSICOP – (i) Committee for the Scientific Investigation of Claims of the Paranormal (became the Committee for Skeptical Inquiry in 2006)
  • CSIP – (i) Commercial Stable Image Platform (AMD)
  • CSIS
  • (p) Canadian Security Intelligence Service ("seessiss")
  • (i) (U.S.) Center for Strategic & International Studies
  • CSK – (s) Czechoslovakia (ISO 3166 trigram; obsolete since 1993)
  • CSL – (i) U.K. Central Science Laboratory
  • CSM – see entry
  • C-SPAN – (i) Cable-Satellite Public Affairs Network
  • CSPI – (i) Center for Science in the Public Interest
  • CSR – (i) Control Supply Rate
  • CSR – (i) Corporate Social Responsibility [http://www.csr.gov.uk]
  • CSRC – (i) Conflict Studies Research Centre
  • CSRF – (i) Cross-Site Request Forgery
  • CSS
  • (i) Cascading Style Sheets
  • Catalina Sky Survey
  • Central Security Service
  • Combat Service Support
  • Confederate States Ship
  • Content Scramble System
  • Cross-site scripting
  • CSSCS – (i) Combat Service Support Control System
  • CST – (i) Central Standard Time (UTC−6 hours)
  • CSUN – (p) California State University, Northridge (pronounced "C-sun")

CT

  • CT – (i) Computed tomography (medical scan also known as a CAT scan) – Central Time zone – Chrono Trigger (Computer/Video games) – (s) Connecticut (postal symbol) – Canterbury (postal symbol) – Chhattisgarh (Indian state code)
  • CTA
  • (s) Central African Republic (FIFA trigram, but not ISO 3166 or IOC)
  • (i) Chicago Transit Authority
  • (i) Comando-Geral de Tecnologia Aerospacial (Portuguese, [Brazilian] "General Command for Aerospace Technology")
  • CTBT – (i) [[Comprehensive Test Ban Treaty|Comprehensive [Nuclear] Test Ban Treaty]]
  • CTC – (i) Closed Timelike Curve (relativity) – (U.S.) Combat Training Center
  • CTDB – (i) Compact Terrain Data Base (file format)
  • CTE
  • (s) Canton and Enderbury Islands (ISO 3166 trigram; obsolete 1984)
  • (i) Chronic traumatic encephalopathy
  • CTGF – (i) connective tissue growth factor
  • CTI – (i) Co-operative Target Identification
  • CTIL – (i) Critical Tracked Items List
  • CTIS – (i) Central Tire Inflation System
  • CTMS – (i) Clinical Trial Management System
  • CTO – (i) Chief Technical Officer – Chief Technology Officer
  • CTS – (i) Clear-To-Send – Collective Training Standards – Communications Technology Service – Contract Technical Services – Conversation Time Sharing – COSMIC Top Secret
  • CTSS – (i) Compatible Time-Sharing System
  • CTU – (i) Counter Terrorist Unit (fictional branch of the Central Intelligence Agency in the television action series 24)
  • CTVT – (i) Canine Transmissible Venereal Tumour

CU

  • cu – (s) Old Church Slavonic language (ISO 639-1 code)
  • Cu – (s) Copper (Latin Cuprum)
  • CU
  • (i) Carrie Underwood
  • (s) Cuba (FIPS 10-4 country code; ISO 3166 digram)
  • (i) University of Colorado Boulder
  • CUB – (s) Cuba (ISO 3166 trigram)
  • CUCV – (i) Commercial Utility Cargo Vehicle
  • CUDAAP –(a) Custom Database Applications
  • CUNY – (a) City University of New York ("CUE-knee")
  • CUP – (s) Cuban peso (ISO 4217 currency code)
  • CUPE – (a) Canadian Union of Public Employees ("CUE-pee")
  • CUPS – (a) Common Unix Printing System
  • CUPW – (i) Canadian Union of Postal Workers
  • CUREA – (a) Consortium for Undergraduate Research and Education in Astronomy
  • CuW – (s) Copper-tungsten pseudo-alloy (from the chemical symbols of the two component elements)
  • CUW – (s) Curaçao (ISO 3166 trigram)

CV

  • cv – (s) Chuvash language (ISO 639-1 code)
  • CV – many, including curriculum vitae (résumé); see entry
  • CVCC
  • (i) Combat Vehicle Command and Control
  • Compound Vortex Controlled Combustion (1970s Honda automobile engine technology)
  • CVE – (s) Cape Verde escudo (ISO 4217 currency code)
  • CVI – (i) Combat Vehicle Identification
  • CVLL – (i) Crypto Variable Logic Label
  • CVR – (i) Cockpit Voice Recorder – Combat Vehicle Reconnaissance
  • CVR(T) – (i) Combat Vehicle Reconnaissance (Tracked)
  • CVS – (i) Concurrent Versions System
  • CVSD – (i) Continuous Variable Slope Delta (modulation)
  • CVT – (i) Continuously Variable Transmission

CW

  • CW
  • (i) Continuous Wave
  • (s) Cook Islands (FIPS 10-4 territory code)
  • (i) Clothes washer
  • (i) The CW
  • CW/CE – (i) Construction Worker / Construction Electrician IBEW
  • CWC – (i) Chemical Weapons Convention
  • CWL – (i) Campus Wide Login
  • CWS – (i) Canadian Wildlife Service
  • CWRU – (i) Case Western Reserve University

CX

  • CX – (s) Christmas Island (ISO 3166 digram) – One Hundred and Ten (in Roman numerals)
  • CXR
  • (s) Christmas Island (ISO 3166 trigram)
  • (s) IATA code for Cam Ranh International Airport

CY

  • cy – (s) Welsh language (ISO 639-1 code)
  • CY – (i) Calendar year – (s) Cyprus (ISO 3166 and FIPS 10-4 country code digram)
  • cym – (s) Welsh language (ISO 639-2 code)
  • CYM – (s) Cayman Islands (ISO 3166 trigram)
  • CYP – (s) Cyprus (ISO 3166 trigram) – Cyprus pound (ISO 4217 currency code)

CZ

  • CZ
  • (i) combat zone
  • (s) Czech Republic (ISO 3166 and FIPS 10-4 country code digram)
  • CZE – (s) Czech Republic (ISO 3166 trigram)
  • CZK – (s) Czech koruna (ISO 4217 currency code)
  • CZF – constructive Zermelo-Fraenkel
  • CZMA – (i) (US) Coastal Zone Management Act
  • CZW – (i) Combat Zone Wrestling

See also