| Abbreviation | Definition |
|---|---|
| STL | Snout to Tail Length |
| STUPID | Super Teriffic Unbareable Positive Inspired Dog |
| SWD | Senior Working Dog |
| SWOC | SouthWest Obedience Club of Los Angeles |
| TAAG | Transylvania Animal Alliance Group |
| TADD | Termite Ant Detection Dog |
| TBD | The Boring Dog |
| TBDA | Tulsa Bird Dog Association |
| TD | The Dog |
| TD | Therapy Dog |
| TD | Tracking Dog |
| TDAA | Teacup Dogs Agility Association |
| TDD | Team Draft Dog |
| TDI | Therapy Dogs International |
| TDL | The Daily Love |
| TDOC | Tallahasee Dog Obedience Club |
| TDPC | Tidewater Dog Performance Club |
| TDTC | Tasmanian Dog Training Club |
| TDTC | Tuggeranong Dog Training Club |
| TDTC | Tulsa Dog Training Club |