| Acronym | Meaning |
 | TTU | Timing Terminal Unit |
 | TTV | Termination |
 | TTY | Teletype |
 | TU | Technical Utilization |
 | TU | Technology Utilization |
 | TU | Transport Unit |
 | TUL | Tula Peak |
 | TURB | Turbine |
 | TV | Television |
 | TV | Thermal Vacuum |
 | TV | Thrust Vector |
 | TV | Transport Vehicle |
 | TVA | Thrust Vector Alignment |
 | TVAR | Test Variance |
 | TVC | Thermal Vacuum Chamber |
 | TVC | Thrust Vector Control |
 | TVC | Thrust Vector Control |
 | TVCA | Thrust Vector Control Actuator |
 | TVCD | Thrust Vector Control Driver |
 | TVCS | Thrust Vector Control System |
 | TVEXPIS | TV Experiment Interconnecting Station |
 | TVN | Test Verification Network |
 | TVP | Test Verification Program |
 | TVS | Toxic Vapor Suit |
 | TVSA | Thrust Vector Control Servoamplifier |
 | TVSSIS | TV Subsystem Interconnecting Station |
 | TVT | Thermal Vacuum Test |
 | TVTA | Thermal Vacuum Test Article |
 | TW | Tailwind |
 | TW | Thumbwheel |
 | TW | Time Words |
 | TW | Traveling Wave |
 | TWD | Twisted Double Shielded |
 | TWL | Total Weight Loss |
 | TWR | Tower |
 | TWT | Traveling Wave Tube |
 | TWT | Trisonic Wind Tunnel (Rockwell) |
 | TWTA | Traveling Wave Tube Amplifier |
 | 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 |
 | TYP | Typical |
 | TZ | Translation Hand Controller Z-Axis Direction |
 | U | Underfloor |
 | U | Uranium |
 | U-SB | Unified S-Band |
 | U/C | Under Current |
 | U/D | Update |