| Abbreviation | Definition |
|---|---|
| SCK | Surf Club Kiel |
| SCKA | Southern California Karate Association |
| SCL | Seneca County League |
| SCL | Senior Classical League |
| SCME | Sports Club Management Expo |
| SCORE | Southern California Off Road Enthusiasts |
| SCORE | Sports Consulting For Optimised Results And Efficiency |
| SCOW | Sailing Club of Washington |
| SCPS | Ski Council Presidents Summit |
| SCR | Sports Compact Racing |
| SCRA | Sprint Car Racing Association |
| SCRC | Southern Cruiser Riding Club |
| SCRM | Slagelse Cykle Ring Motion |
| SCRP | Sports Car Racing Performance |
| SCRR | Southern California Road Runners |
| SCRR | St. Cloud River Runners |
| SCRV | Slaughter County Roller Vixens |
| SCS | Single Card Strategy |
| SCS | Southern California Swimming |
| SCSA | Steel Challenge Shooting Association |