| Abbreviation | Definition |
|---|---|
| STOL | System Test and Operations Language |
| STP | Self-Test Program |
| STP | Shuttle Technology Panel |
| STP | Solar Terrestrial Probes program |
| STP | Space Technology Payload |
| STP | Space Test Program |
| STP | System Test Plan |
| STPH | Static Phase Error |
| STR | Structure |
| STR | System Test Review |
| STRAT | Special Telemetry Research And Tracking |
| STRB | Strobe |
| STRCH | Stretch |
| STRFLD | Star Field |
| STRG | Steering |
| STRG | String |
| STRK | Star Tracker |
| STRL | Structural |
| STRUC | Structure |
| STRUCT | Structure |