| Abbreviation | Definition |
|---|---|
| TOM | Time On Mission |
| TOML | Time Of My Life |
| TOO | Test Operations Order |
| TOO | Threshold of Odor |
| TOP | Technical Operating Procedure |
| TOP | Tether Optical Phenomena |
| TOPEX | Topographical Explorer |
| TOPS | Transistorized Operational Phone System |
| TOS | Test Operating System |
| TOS | Transfer Orbit Stage |
| TOT | TOTal |
| TOTS | Transport Off The Satellite |
| TOW | Tank and Orbiter Weight |
| TP | Test Point |
| TP | Test Port |
| TP | Test Procedure |
| TP | Time to Perigee |
| TP | Tracker Processor |
| TP | Training Plan |
| TP | Transition Period |