| Abbreviation | Definition |
|---|---|
| CNW | Cartoon Network |
| CNX | Cartoons Night Xtreme |
| CO | Clockwork Orange |
| COA | Certificate of Operating Authority |
| COEM | College of Events and Media |
| COHS | Cooperative Open Hypermedia System |
| COLCCMA | Chinese Oral and Literary Copyright Collective Management Association |
| COLTAM | COmmittee on Local Television Audience Measurements |
| COMET | California Online Mathematics Education Times |
| COMG | China Outdoor Media Group |
| COMPACT | COMmittee to Preserve American Color Television |
| COMPO | Council of Motion Picture Organizations |
| COMPOST | The Washington Post |
| COMSAT | Communications Satellite Corporation |
| CONT | Continued |
| CONTAM | Committee on National Television Audience Measurements |
| CONTD | Continued |
| COP | Children Of the Phoenix |
| COPE | Cadena de Ondas Populares Espa??ola ( Popular Spanish Radio Network) |
| CORR | Correction |