| Abbreviation | Definition |
|---|---|
| STICS | SupraThermal Ion Composition Spectrometer |
| STIL | Software Test and Integration Laboratory |
| STIRD | SAIL (Shuttle Avionics Integration Laboratory) Test Implementation Requirements Document |
| STIRD | SAIL Test Implementation Requirements Document |
| STIS | Space Telescope Imaging Spectrograph |
| STL | Space Technology Laboratories |
| STLOS | STar Line Of Sight |
| STM | Short Term Mission |
| STM | Signal Termination Module |
| STM | Static Test Model |
| STM | Support Test Manager |
| STM | Synchronous Transmission Module |
| STME | Space Transportation Main Engine |
| STMP | Sequence Tagged Microsatellite Profiling |
| STN | Software Trouble Note |
| STO | Stage To Orbit |
| STO | Stow |
| STOCC | Space Telescope Operations Control Center |
| STOF | Suprathermal- Time- Of- Flight |
| STOL | Spacecraft Test and Operations Language |