| Abbreviation | Definition |
|---|---|
| SSZ | Solar Soyuz Zaibatsu |
| ST | Sequential Timer |
| ST | Simplification Task |
| ST | Solar Terrestrial |
| ST | Space Talk |
| ST | Space Telescope |
| ST | Spacelab Technology |
| ST | Special Tooling |
| ST | Star Tracker |
| ST | Starter |
| ST | Static |
| ST | Structural |
| STA | Shuttle Training Aircraft |
| STA | Static Test Article |
| STA | Structural Test Article |
| STAB | Stabilize, Stabilizer |
| STAC | Shuttle Task Activation Contractor |
| STACC | Standard Telemetry And Command Components |
| STADAC | Station Data Acquisition and Control |
| STADAN | Satellite Tracking and Data Acquisition Network |