| Abbreviation | Definition |
|---|---|
| SAS | Southland Anime Society |
| SASE | Self Addressed Stamped Envelope |
| SASP | Self Addressed Stamped Postcard |
| SB | Sealed Box |
| SBC | Small Block Chevy |
| SBN | Survival Bond Nederland |
| SBS | Struct to Byte Slice |
| SC | StarCraft |
| SCAB | Some Children Are Brilliant |
| SCAB | Southern California Airsoft Battalion |
| SCADB | Southern California Deaf Bikers |
| SCAM | Scale Combat Aircraft Modelers |
| SCCA | Supercharged Cigarette Club of America |
| SCF | Super Collection Figures |
| SCF | Superhero Costuming Forum |
| SCI | Science of Creative Intelligence |
| SCMCS | South Carolina Muscle Car Society |
| SCMRRC | Stoney Creek Model Rail-Road Club |
| SCRR | Schedsmoe County Rough Riders |
| SCSC | Southern California Speedboat Club |