| Abbreviation | Definition |
|---|---|
| TVTA | Thermal Vacuum Test Article |
| TVV | Test, Verification, and Validation |
| TW | TailWind |
| TW | ThumbWheel |
| TW | Time Words |
| TW | Traveling Wave |
| TWD | Twisted Double Shielded |
| TWG | Test Working Group |
| TWL | Total Weight Loss |
| TWSTFT | Two-Way Satellite Time and Frequency Transfer |
| TWT | Traveling Wave Tube |
| TWT | Trisonic Wind Tunnel |
| TWT | Trisonic Wind Tunnel (Rockwell) |
| TWTA | Traveling Wave Tube Amplifier |
| TWU | Transport Workers' Union |
| TWX | Teletype Wire Transmission |
| TX | Translation Hand Controller X-Axis Direction |
| TX | Transmit Channel |
| TX/RX | Transmitter/Receiver |
| TY | Translation Hand Controller Y-Axis Direction |