| Abbreviation | Definition |
|---|---|
| TDHA | Tennessee Dental Hygienists' Association |
| TDHA | Texas Dental Hygienists' Association |
| TDMA | Titanium Dioxide Manufacturers Association |
| TEA | Transportation Estimator's Association |
| TEAMWORK | Together Everyone Achieves More Working Out Real Kinks |
| TEATA | Thai Ecotourism and Adventure Travel Association |
| TEFT | Training Evaluation Framework and Tools |
| TEI | Teacher Education Institute |
| TENG | Technology Executives Networking Group |
| TEOA | Telecom Engineers Officers Association |
| TERMIS | Tissue Engineering and Regenerative Medicine International Society |
| TETRA | Texas Equestrian Trail Riders Association |
| TFCD | Task Force on Climate-related Financial Disclosures |
| TFG | Timber Framers Guild |
| TFI | The Fertilizer Institute |
| TFI | Turin Flying Institute |
| THA | Tongan History Association |
| THAG | Tourism and Hospitality Association of Guyana |
| theInternationalDairyFederation | International Dairy Federation |
| TIA | Telecommunications Industry Association |