| Acronym | Meaning |
 | CEA | Campaign Effectiveness Analysis |
| CECOM | U.S. Army Communications And Electronics Command |
| CEGEP | Coll?ge D'enseignement G?n?ral Et Professionnel (French |
| CEI | Competitive Enterprise Institute |
| CENTCOM | United States Central Command |
| CENTO | Central Treaty Organization (Baghdad Pact) |
| CENZUB | Centre D'entra?nement Aux Actions En Zone Urbaine (French |
| CEO | Chief Executive Officer |
| CEP | Circular Error Probable |
| CEPT | Conf?rence Europ?enne Des Administrations Des Postes Et Des T?l?communications (French |
| CERCLA | U.S. Comprehensive Environmental Response |
| CERDEC | U.S. Communications-Electronics Research |
| CERGA | Centre De Recherches En G?odynamique Et Astrom?trie (French |
| CERN | Centre Europ?en Pour La Recherche Nucl?aire (French |
| CERT | Computer Emergency Response Team |
| CES | Czech Language (ISO 639-2 Code) |
| CESS | Centre For Earth Science Studies (India) |
| CEV | Combat Engineer Vehicle - Crew Exploration Vehicle |
| CEWC | Council For Education In World Citizenship |
| CF | Canadian Forces -Central African Republic (ISO 3166 Digram) - Republic Of The Congo (FIPS 10-4 Country Code) |
| CF | Californium |
| CF. | Confer (Latin Compare |
| CFA | Cat Fanciers' Association - Chartered Financial Analyst - Colour Filtering Array - County Fire Authority - Covering Force Area |
| CFAR | Christine's - Federal Acquisition Regulation |
| CFC | ChloroFluoroCarbon |
| CFFZ | Call For Fire Zone |
| CFG | Context-free Grammar - Control Flow Graph |
| CFHT | Canada-France-Hawaii Telescope |
| CFI | Center For Inquiry (CSICOP) |
| CFL | Canadian Football League - Co-ordinated Fire Line |
| CFLCC | Coalition Forces Land Component Command |
| CFO | Chief Financial Officer |
| CFR | Code Of Federal Regulations |
| CFRP | Carbon Fibre Reinforced Plastic |
| CFS | Chronic Fatigue Syndrome |
| CFSP | Common Foreign And Security Policy |
| CFV | Cavalry Fighting Vehicle |
| CFZ | Critical Friendly Zone |
| CG | Client Group - Computer Graphics -Democratic Republic Of The Congo (FIPS 10-4 Country Code) - Republic Of The Congo (ISO 3166 Digram) |
| CGDC | Computer Game Developers Conference (became GDC In 1998) |
| CGF | Computer-Generated Forces (Simulation) |
| CGH | Comparative Genomic Hybridisation |
| CGIG | Cross-Government Implementation Group |
| CGM | Computer Graphics Metafile |
| CGS | Chief Of The General Staff |
| CGT | Capital Gains Tax |
| CH | Chieftain Tank -China (FIPS 10-4 Country Code) - Switzerland (ISO 3166 Digram; From Latin Confoederatio Helvetica) |
| CH | Chamorro Language (ISO 639-1 Code) |
| CHA | Chamorro Language (ISO 639-2 Code) |
| CHAMPUS | (U.S.) Civilian Health And Medical Program Of The Uniformed Services |
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