| Abbreviation | Definition |
|---|---|
| TFP | Third Floor Posse |
| TFR | Total Fertility Rate |
| TFV | Task Force Valkyrie |
| TFW | Timber Fish And Wildlife |
| TFY | Target Fiscal Year |
| TFZ | Technology Free Zone |
| TGA | The Great Alliance |
| TGH | Treaty of Guadalup- Hidalgo |
| TGM | Telegram |
| TGN | Thesaurus of Geographic Names |
| THB | Trafficking of Human Beings |
| THC | Tentative Human Consensus |
| ThJ | Thomas Jefferson |
| THOMAS | The House Open Multimedia Access System |
| THP | Timber Harvest Plan |
| THP | Timber Harvesting Plan |
| THSGP | Tribal Homeland Security Grant Program |
| TI | Taxable Income |
| TI | Territorian Integrity |
| TI | Tortured Individual |