| Abbreviation | Definition |
|---|---|
| CARA | Canadian Adventure Racing Association |
| CARA | Championship Auto Racing Auxiliary |
| CARA | Chicago Area Runners Association |
| CARB | Central Auto Racing Boosters |
| CARF | California Authority of Racing Fairs |
| CARS | Community Assisted Race Sim |
| CARS | Community Assisted Racing Simulator |
| CART | Cancelled At Race Time |
| CART | Championship Auto Race Team |
| CART | Championship Auto Racing Team |
| CART | Championship Auto Racing Teams |
| CBB | Charleston Bending Brace |
| CBR | Cafe Bred Racer |
| CBR | California Bicycle Racing |
| CBR | Circuit Based Racer |
| CBR | City Bike Race |
| CBR | City Bike Racing |
| CBR | Closed Body Racer |
| CBR | cross beam racer |
| CBV | Christophe Barriere-Varju Rally Racing Team |