| CC | Code Civil [Code Napoléon] französische Gesetzbuch zum Zivilrecht |
| D.C.L. | Doctor of Civil Law |
| cd | Civil Defense |
| CCC | Civil[ian] Conservation Corps |
| CAA | Civil Aviation Authority [U.K.] London, http://www.caa.co.uk |
| ADJ | Amman Civil Airport Jordanien [Internationaler Airport Code] |
| CE | Civil Engineer [engl.] Bau-Ingenieur |
| GCT | Greenwich Civil Time |
| CS | Civil Servant [engl.] Angehöriger des öffentlichen Dienstes |
| CRC | Civil Rights Commission |
| B.C.L. | Bachelor of Civil Law [engl.] Akademischer Grad für Zivilrecht |
| Cap | Civil/ Combat Air Patrol |
| CAB | Civil Aeronautics Board Heute: FAA |
| CAA | Civil Aeronautics Administration Heute: FAA |
| ECAC | European Civil Aviation Conference Europäische Zivilluftfahrtkonferenz |
| JCAC | Joint Civil Affairs Committee |
| ICAO | International Civil Aviation Organization |
| CAPC | Civil Aviation Planning Committee |
| CAAC | Civil Aviation Administration of China [engl.] Beijing, http://www.caac.gov.cn |
| ASCE | American Society of Civil Engineers [engl.] Reston [VA], http://www.asce.org |
| CCCR | Citizens Commission for Civil Rights [engl.] Washington, DC, http://www.cccr.org |
| BCMT | Begin of Civil Morning Twilight [engl.] Beginn der Morgendämmerung |
| ACLU | American Civil Liberties Union [engl.] Amerikanische Bürderrechtsbewegung |
| J.C.D. | Juris Civilis Doctor [Doctor of Civil Law] Doktor der Rechtswissenschaften |
| CP | Canadian Airlines International [IATA-Airline-Code/ Kanada] [IATA-Airline-Code/ von Air Canada übernommen] |
| QV | Lao Airlines [IATA-Airline-Code / Laos] [IATA-Airline-Code / ehem. Lao Aviation] |
| SIL | SIL-Code Dallas, http://www.sil.org |
| C | Code |
| UC | Universal Code |
| LOC | Lines Of Code |
| TCP | Tex Code Page |
| COVE | Code Verification |
| TC | Treatment Code |
| CJ | China Northern Airlines [IATA-Airline-Code/ China] [IATA-Airline-Code/ gehört inzwischen zu China Southern: China Southern Airlines Northern Branch] |
| ITC | International Telegraph Code |
| C/S | Code Segment [engl.] |
| ICD | International Code Designator |
| HWCP | Hardware Code Page |
| UCC | Uniform Commercial Code |
| IDC | Item Description Code |
| BIC | Bank Identifier Code |
| IRC | Internal Revenue Code |
| UPC | Universal Product Code |
| trn | ASCII-Code-Modul eine Dateiendung |
| SIC | Standard Industry Code |
| NLOC | Netto Lines Of Code |
| OCI | Object Code Insertion |
| SAC | Special Area Code |
| SAC | Service Area Code |
| PCM | Pulse Code Modulation |