| Abbreviation | Definition |
|---|---|
| TAI | Temps Atomique International (International Atomic Time) [to 2015 July 1st, 35s ahead of UTC; from 2015 July 1st, 36s ahead of UTC.] |
| TAIR | Test Assembly Inspection Record |
| TAL | Transatlantic Abort Landing |
| TAL | Transoceanic Abort Landing |
| TALAR | Tactical Approach and Landing Radar |
| TAM | Thermal Analytical Model |
| TAN | Tananarive, Madagascar (Spaceflight Tracking and Data Network Site) |
| TAN | Tananarive, Madagascar (STDN Site) |
| TAO | Trans-Atlantic Abort |
| TAP | Technical Achievement Plan |
| TAP | Telemetry Acceptance Pattern |
| TAP | Test Administration Plan |
| TAP | Total Air Pressure |
| TAR | Technical Analysis Request |
| TAR | Test Action Requirement |
| TAR | Test Agency Report |
| TARC | Through Axis Rotational Control |
| TAS | Telemetry Antenna Subsystem |
| TAS | Test Article Specification |
| TAS | Tether Applications in Space |