| Abbreviation | Definition |
|---|---|
| T | Turmoil |
| TA | Technology Assessment |
| TAA | Technical Assistance Agency |
| TAA | Trade Adjustment Assistance |
| TAAD | Taxpayer Audit and Assessment Department |
| TAB | Talk About Budget |
| TAB | Totalizator Agency Board |
| TAC | Treaty of Amity and Cooperation |
| TACAN | Tactical Control and Navigation System |
| TACT | Temporary Anti Capitalist Teams |
| TAD | Technology Activities Database |
| TAF | Test Automation Framework |
| TAG | Transition Advisory Group |
| TALON | Tax And Lien Online Network |
| TAMIS | Taxpayer Advocate Management Information System |
| TAN | Tax Anticipation Note |
| TANF | Temporary Assistance for Needy Families |
| TAP | Technical Assistance Publication |
| TAP | Technical/Technological Assistance Program |
| TAP | Technological Assistance Program |