| Abbreviation | Definition |
|---|---|
| CARICOM | Caribbean Community |
| CARICOMP | Caribbean Coastal Marine Productivity |
| CARIPOL | Marine Pollution Monitoring Programme in the Caribbean |
| CARSTIN | Regional Network for the Exchange of Information and Experience in Science and Technology in the Caribbean |
| CART | Cloud and Radiation Testbed |
| CAS | Commission for Atmospheric Sciences |
| CAS | Committee on Atmospheric Sciences |
| CASC | Central Administrative Support Center |
| CASE | Coordinated Air- Sea Experiment |
| CASES | Canadian Arctic Shelf Exchange Study |
| CASP | Canadian Atlantic Storm Project |
| CAST | China Association for Science and Technology |
| CATS | Canadian Archipelago Throughflow Study |
| CBD | Commerce Building Daily |
| CBD | Convention on Biological Diversity |
| CBF | Chesapeake Bay Foundation |
| CBL | Convective Boundary Layer |
| CBOS | Chesapeake Bay Observing System |
| CBS | Commission for Basic Systems |
| CC | Conversion Current |