| Abbreviation | Definition |
|---|---|
| CRSF | Club Regatas Santa Fe (Spanish: Racing Club Santa Fe; Argentina) |
| CRT | Carbon Racing Technloogy |
| CS | Coupe Sport |
| CSCR | Clubman Sports Car Racing |
| CTCC | Canadian Touring Car Championship |
| CTR | Colorado Trail Race |
| CTR | Crash Team Racing |
| CTRT | Camel Toe Race Team |
| CTTR | Crash Tag Team Racing |
| CVAR | Corinthian Vintage Auto Racing |
| CVSR | Coachella Valley Street Racing |
| CWR | Cross World Racing |
| CWRA | Central Wisconsin Racing Association |
| CWRR | Chris Woods Racing and Repair |
| DAMS | Driot Arnoux Motor Sport |
| DAR | Dignity After Racing |
| DART | Downtown Adventure Race Topeka |
| DASU | Dansk Automobil Sports Union |
| DBDT | Du Bist Der Teamchef |
| DBR | David Brown Racing |