| Abbreviation | Definition |
|---|---|
| CMIP | Coupled Model Intercomparison Project |
| CMIST | Configuration Management Integrated Support Tool |
| CMM | Commission for Marine Meteorology |
| CMO | Caribbean Meteorological Organization |
| CMOB | Courses in Marine Sciences |
| CMP | Coastal Management Programs |
| CMREP | Committee on Marine Research, Engineering and Facilities |
| CMSER | Commission on Marine Science, Engineering and Resources |
| CM-XMP | Cloud Model With Explicit Microphysics |
| CN | Condensation Nucleus |
| CNA | Center for Naval Analysis |
| CNODC | China National Oceanographic Data Center |
| CNR | Committee on Natural Resources |
| CNR | Conseil National de Recherches |
| CNRS | Centre National de la Recherche Scientifique |
| CNSD | Computer and Network Services Division |
| COAM | Center for Ocean and Atmospheric Modeling |
| COAMPS | Coupled Ocean Atmosphere Mesoscale Prediction System |
| COAP | Center for Ocean Analysis and Prediction |
| COAST | Coastal Observation And Simulation with Topography |