| Abbreviation | Definition |
|---|---|
| COE | Contingent Owned Equipment |
| COG | Crisis Operations Group |
| CONUSA | Conseil des Nigériens aux USA |
| CoP | Certification of Payment |
| COP | Convention Of the Parties |
| COP21 | Conference of the Parties |
| COP-MOP | Conference Of the Parties - Meeting Of the Parties |
| COP-MOP | Conference Of the Parties - Meeting of the Parties to the CPB |
| COPUOS | Committee on the Peaceful Uses of Outer Space |
| CORE | Congress Of Racial Equality |
| CoSP | Conference of the States Parties |
| CP | Close Protection |
| CPAN | Child Protection Action Network |
| CPB | Cartagena Protocol on Biosafety |
| CPP | Communist Party Parrot |
| CPR | Committee of Permanent Representatives |
| CPUN | Club Penguin United Nations |
| CR | Compassionate Revolution |
| CR | Cultural Resource |
| CRC | Convention for Rights of Children |