| Abbreviation | Definition |
|---|---|
| TA | Third Age |
| TAA | The Alien Army |
| TACC | Total Annihilation Conflict Crusher |
| TAR | The Apocalypse Riders |
| TARDIS | Time And Relative Dimension In Space |
| TARDIS | Time And Relative Dimensions In Space |
| TARDIS | Time Apparatus for Really Distant Interstellar Sojourns |
| TBC | The Borg Collective |
| TBR | The Battletech Resource |
| TBS | The Beastmaster Station |
| TC | Terra Crusher |
| TCB | Taken Captive to Babylon |
| TCC | Terran Confederacy Corps |
| TCW | The Clone Wars |
| TD | Tunnel Drive |
| TD | Twisted Destiny |
| TDE | Time Displacement Equipment |
| TDF | Terran Defense Force |
| TDF | Terrestrial Defense Force |
| TDH | The Dark Hand |