| Abbreviation | Definition |
|---|---|
| COLM | Conservation Of Linear Momentum |
| CONSER | Conservation |
| CORE | Conservation and Outdoor Recreation Enthusiasts |
| COSCA | Conejo Open Space Conservation Agency |
| CPAL | Conservation Program on Agricultural Lands |
| CPDS | Conservation Practice Data System |
| CPIC | Coalition For Private Investment In Conservation |
| CPL | Conservation Partners Legacy |
| CRAC | Conservation Resources Advisory Committee |
| CRCA | Cataraqui Region Conservation Authority |
| CRCI | Cultural Resource Conservation Initiative |
| CRCP | Coral Reef Conservation Program |
| CREP | Conservation Reserve Enhanced Program |
| CREW | Conservation and Research of Endangered Wildlife |
| CREW | Conservation Research of Endangered Wildlife |
| CRMH | conservation régionale des monuments historiques |
| CRP | Conservation Reservation Program |
| CSCB | Colorado State Conservation Board |
| CSD | Conservation and Survey Division |
| CSI | Conservation Science Investigations |