| Abbreviation | Definition |
|---|---|
| SWAK | Society of Women Addicted to Knitting |
| SWAT | Syndicate Wrestling And Tradition |
| SWL | Short Wave Listening |
| SWOA | SouthWest Orienteering Association |
| SWOG | Style Wagon Owners Group |
| SY | Slight Yellowing |
| SYOA | Salcombe Yawl Owners Association |
| SYTC | Swiss Yorkshire Terrier Club |
| TAAS | Triangle Area Anime Society |
| TACA | Tennessee Association of Craft Artists |
| TALON | Texas Area Lightning Owners North |
| TAMS | Token And Medal Society |
| TAPS | The Atlantic Paranormal Society |
| TB | Tea Bandit |
| TB | Travel Bug |
| TBB | Teenie Beanie Babies |
| TBB | The Black Butler |
| TBDC | Tuscaloosa Ballroom Dance Club |
| TBDL | Teen Baby Diaper Lovers |
| TBH | Top-Bar Hive |