| Abbreviation | Definition |
|---|---|
| CLCC | Connecticut Land Conservation Council |
| CLD | Council for Learning Disabilities |
| CLD | Council Learning Disabilities |
| CLIR | Council for Library and Information Resources |
| CLIR | Council on Library and Information Resources |
| CLMP | Council Of Literary Magazines And Presses |
| CLPC | Collingham with Linton Parish Council |
| CLPN | Council for Licensed Practical Nurses |
| CLR | Council on Library Resources |
| CLRC | Central Laboratory of the Research Councils |
| CLRC | Construction Labor Research Council |
| CLWE | Council for Latino Workplace Equity |
| CMAC | Carnegie Mellon Admission Council |
| CMAC | Catholic Marriage Advisory Council |
| CMAC | Construction Management Advisory Council |
| CMAH | Council for Minnesotans of African Heritage |
| CMC | Conflict Minerals Council |
| CMCCC | California Mathematics Council Community Colleges |
| CMEA | The Council For Mutual Economic Assistance |
| CMEC | Cambridge Model European Council |