| Abbreviation | Definition |
|---|---|
| TASC | The Association of Settlement Companies |
| TASO | The AIDS Support Organization |
| TASOL | Teachers of English to Speakers of Other Languages, Inc. |
| TASP | Texas Association of School Psychologists |
| TAU | Texas Area Untouchables |
| TBA | Tidewater Biking Association |
| TBD | Türkiye Bili_im Derne i (Turkish Informatics Society) |
| TBD | Türkiye Bilisim Dernegi (Turkish Informatics Society) |
| TBERA | Toronto Beach East Residents Association |
| TCA | Title Council of America |
| TCA | Truckload Carriers Association |
| TCAA | Tile Contractors Association of America |
| TCAS | Toronto Commercial Arbitration Society |
| TCBA | Tesla Coil Builders Association |
| TCCN | Twin Cities Compensation Network |
| TCEA | Texas Computer Education Association |
| TCEP | Texas College of Emergency Physicians |
| TCG | Trusted Computing Group |
| TCIP | Tarrant County Insurance Professionals |
| TCPS | Technical Committee on Product Standards |