| Abbreviation | Definition |
|---|---|
| CRP | Computer Role Play |
| CRS | Carbon Race Series |
| CRSS | Certified Recreational Sports Specialist |
| CRSS | Certified Recreational Sports Specialists |
| CRTU | Conceptions r??gionales des transports et de l'urbanisation |
| CRV | Car Recreational Vehicle |
| CRW | Charles River Wheelmen |
| CRYC | Coral Reef Yacht Club |
| CS | Cabin Sailer |
| CS | Calgary Stampede |
| CS | Camper Sniping |
| CS | Car Sport |
| CS | Carolina Spartan |
| CS | Caught Stealing |
| CS | Clean Sweep |
| CSA | Canadian Soccer Association |
| CSA | Cricket South Africa |
| CSAA | Colorado State Archery Association |
| CSAC | Chicagoland Sports Appearance Connection |
| CSAHA | Colorado Springs Amateur Hockey Association |