List of acronyms: C

From Wikipedia, the free encyclopedia

This list contains acronyms, initialisms, and pseudo-blends  that begin with the letter C.

For the purposes of this list:

  • acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars
  • initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
  • pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).
(a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome
(i) = initialism, e.g.: CD – (i) compact disc
(p) = pseudo-blend, e.g.: UNIFEM – (p) United Nations Development Fund for Women
(s) = symbol (none of the above, representing and pronounced as something else; for example: MHz – Megahertz)

Some terms are spoken as either acronym or initialism, e.g., VoIP, pronounced both as voyp and V-O-I-P.

(Main list of acronyms)

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

C0–9[]

  • C2 or C2 – (i) Command and Control
  • c2c – (s) the British rail company formerly known as LTS Rail
  • C2C
  • C2D or C2D – (i) Intel Core 2 Duo
  • C2IEDM or C2IEDM – (i) Command and Control Information Exchange Data Model
  • or C2IS – (i) Command and Control Information System
  • or C2PC – (i) Command and Control Personal Computer
  • C2V or C2V – (i) Command and Control Vehicle
  • C2W or C2W – (i) Command and Control Warfare
  • C3 or C3
    • (i) Colorectal Cancer Condition
    • Command, Control, and Communications
  • C3I or C3I – (i) Command, Control, Communications, and Intelligence
  • C4 or C4 – (i) Command, Control, Communications, and Computers
  • C4I or C4I – (i) Command, Control, Communications, Computers, and Intelligence
  • C4ISR or C4ISR – (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
    • Colonial Athletic Association
  • CAAT
  • CAC
    • (i)
  • CACM
  • CAD
    • (s) Canadian dollar (ISO 4217 currency code)
    • (a) Computer-Aided Design
    • - (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
  • – (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
  • – (i/a) (constructive simulation)
  • CAF
    • (s) Central African Republic (ISO 3166 trigram)
    • (i) Confederation of African Football (or French Confédération Africaine de Football)
  • – (a) Combined Arms For Air Defence
    • (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
  • CAMRA – (p) CAMpaign for Real Ale
  • CAN – (s) Canada (ISO 3166 trigram)
  • – (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
  • CAQ – (i) Coalition Avenir Québec (French, "Coalition for Québec's Future"; political party in that Canadian province)
  • CARB (i) – California Air Resources Board
  • CARE
  • – (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
  • – (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
  • – (p) Counterattack
  • CATS – (a) Computer Active Technology Suspension
  • CATT – (a/i) Combined Arms Tactical Trainer
  • CAV – (p) Cavalry
  • – (p) Ceiling And Visibility OK ("Kav-okay")
  • CAW – (i) Canadian Auto Workers (trade union)

CB[]

  • CB
  • – (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 –
  • 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
  • CBR – (i) Case-Based Reasoning
  • 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) Cognitive Behaviour Therapy
    • (p) Combat
  • CBUS – (i) Columbus, Ohio

CC[]

  • CC – many, including carbon copy; see entry
  • CCA – (i) Counter Command Activity
  • CCCAA – (p/i) California Community College Athletic Association (usually pronounced "3C-2A")
  • CCC
  • 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
  • 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
  • – (p) (French for , merged with the CCIT in 1956 to form the CCITT)
  • CCII
    • (i) Command and Control Information Infrastructure
    • Community Capital Investment Initiative
  • CCIR
  • CCIT – (p) (French for , merged with the CCIF in 1956 to form the CCITT)
  • CCITT – (p) (French for International Telegraph and Telephone Consultative Committee, became the ITU Telecommunication Standardization Sector, ITU-T, in 1992)
  • CCK
  • 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
  • CCOC
  • – (i) Coalition Common Operating/Operational Picture
  • CCP
    • (i) Casualty Collection Point
    • Communications Checkpoint
    • Contingency Communications Package
  • CCPA – (i) Consumer Credit Protection Act
  • CCR – (i) Creedence Clearwater Revival
  • – (p) Canadian Conservative Reform Alliance party
  • CCRP – (i) Command and Control Research Program
  • – (i) Command and Control Research and Technology Symposium
  • – (a) Coordinadora de Centrales Sindicales del Cono Sur
  • – (i) Consultative Committee for Space Data Systems
  • – (i) Command and Control Simulation Interface Language ("cecil")
  • – (i) Cyclic Code Shift Keying
  • CCT – (i) Current Commitments Team
  • CCTT – (i)

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
  • 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.
  • 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")
  • – (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
  • – (i)
  • CDMSII – (p) Cryogenic Dark Matter Search II
  • CDMX – (p) Ciudad de México, the Spanish name of Mexico City
  • Cdr – (p) Commander
  • CDS
  • – (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
  • 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
  • CEWC – (a/i) Council for Education in World Citizenship

CF[]

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
  • – (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)
  • 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
  • – (a) California Highway Patrol
  • CHIPS – (a) Cosmic Hot Interstellar Plasma Spectrometer
  • CHL – (s) Chile (ISO 3166 trigram)
  • – (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
  • – (a) California Hospital Patient Safety Organization
  • CHS – (i) Combat Health Support
  • CHT – (i)
  • 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
    • 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
    • (p) Combat Identification
    • (i) Criminal Investigation Division
    • Criminal Investigations Department
  • CID – Certified Interior Designer - A Certified Interior Designer (CID) licensed in New York (USA) plans, designs, supervises and/or consults on various aspects of interior spaces.
  • CIÉ – (i) Commission internationale de l'éclairage
  • – (i) (International Frequency Registration Board)
  • CIF – (i) 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
  • CIP – (a) Combat Identification Panel
  • CIPE – (i) (European)
  • 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
  • – (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)
  • – (p) Civilian Population
  • CIWS – (i) Close-In Weapon System
  • CHRS – Canadian Heart Rhythm Society

CJ[]

CK[]

  • CK – (s) Cocos (Keeling) Islands (FIPS 10-4 country code) – Cook Islands (ISO 3166 digram)
  • CKA – (i) commonly known as, (a) Canada Kicks Ass
  • CKND – 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
  • – (a)
  • 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
  • – (i) CentroLateral PreFrontal Cortex
  • – (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
  • 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
  • – (i) Correct me if I am wrong
  • CMIS
  • 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
  • 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
  • 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)
  • – (i) Cost Operational Effectiveness Analysis (military)
  • – (i) Combined Operational Effectiveness and Investment Appraisal (military)
  • C of I – (i) Certificate of Indebtedness (financial) – (i) The College of Idaho
  • – (i) Conduct Of Fire Trainer (military)
  • COG – (i) Centre Of Gravity – Current Operations Group (military) – (s) Republic of the Congo (ISO 3166 trigram)
  • – (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)
  • 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)
  • – (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
  • – (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
  • – (p) Corps Support Command (military)
  • COSER – (p) COoperative SERvice
  • COSHH – (p) Control Of Substances Hazardous to Health (United Kingdom)
  • 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[]

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
  • 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)
  • – (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
  • CRT
  • CRTC – (i) Canadian Radio-television and Telecommunications Commission

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
  • C/S/A – (i) CINC, Service, and Agency
  • CSAR – (p) Combat Search and Rescue ("seessar")
  • CSC
    • (i) Closed Spacelike Curve (relativity)
    • Compact system camera
    • Computer Sciences Corporation (became DXC Technology in 2017)
    • Computer Security Centre
  • CSCC Canadian Society of Clinical Chemists
  • – (i/a) ("see-seal")
  • – (p) (U.S. DoD) Crew Systems Ergonomics
  • 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 [1]
  • CSRC – (i) Conflict Studies Research Centre
  • CSRF – (i) Cross-Site Request Forgery
  • CSS
  • – (i)
  • CST – (i) Central Standard Time (UTC−6 hours)

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 [Nuclear] Test Ban Treaty
  • CTC – (i) Closed Timelike Curve (relativity) – (U.S.)
  • CTDB – (i) (file format)
  • CTE
  • CTGF – (i) connective tissue growth factor
  • CTI – (i) Co-operative Target Identification
  • CTIL – (i) Critical Tracked Items List
  • – (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
  • – (a)
  • 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
  • – (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 – Clothes Washer - (s) Cook Islands (FIPS 10-4 territory code)
  • – (i) Construction Worker / Construction Electrician IBEW
  • CWC – (i) Chemical Weapons Convention
  • CWL – (i)
  • 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)

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[]

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