| Abbreviation | Definition |
|---|---|
| CAM | Cut And Mount |
| CAPEX | CAPE EXposition stamp show |
| CAPS | Canadian Academy of Practical Shooting |
| CAPS | Classical Amiga Preservation Society |
| CARP | Central Arkansas Recreational Pedalers |
| CARP | Central Arkansas Recreational Peddlers |
| CARS | Classic Antique Rods and Special |
| CARS | Clemson Auto Racing Society |
| CBBC | Central Bucks Bicycle Club |
| CBL | Crazy Basketball Lover |
| CBN | Cubic Boron Nitride |
| CBS | Canadian Barbeque Society |
| CBS | Comic Book Society |
| CBT | Cock and Ball Torture |
| CCA | Canaan Club of America |
| CCA | Collie Club of America |
| CCA | Cyber Cats Association |
| CCB | Creative Club of Belgium |
| CCC | Country Cooking Club |
| CCC | Camaro Custom Club |