| Abbreviation | Definition |
|---|---|
| COMPUS | IEEE Symposium on Foundations of COMPUter Science |
| COMSIG | South African Symposium on COMmunications and SIGnal Processing |
| COMSWARE | International Conference on Communication Systems Software and Middleware |
| COMWOR | International Conference on COMputer WORkstations |
| CONA | Conference On National Affairs |
| CONAPLIN | Conference on Applied Linguistics |
| CONEST | Conference on English Studies |
| CONFER | conferred |
| CONFER | conferring |
| CONFESS | Confessing |
| CONFESS | Confession |
| CONTEL | International Conference on Telecommunications |
| COOPIS | IFCIS International Conference on COOPerative Information Systems |
| COP | Conference of Parties |
| COPEC | Conference On Problems Of Economic Change |
| COPEC | Copecconference On Problems Of Economic Change |
| CORE | Conference On Reforming Education |
| CORE | Congress Of Racial Equality |
| CORL | Conference on Robot Learning |
| CORNEL | IEEE/CORNELl Conference on High-Speed Semiconductor Devices and Circuits |