| Abbreviation | Definition |
|---|---|
| SH2 | Supercritical Hydrogen |
| SHA | Sidereal Hour Angle |
| SHAG | Simplified High Accuracy Guidance (Honeywell) |
| SHAP | Sample Handling and Analysis Plan |
| SHARAD | Shallow Subsurface Radar |
| SHARE | Space Station Heat Pipe Advanced Radiation (STS-29) |
| SHARE | Space Station Heat Pipe Advanced Radiation Element |
| SHARP | Safety And Health Achievement Recognition Program |
| SHARP | Summer High School Apprenticeship Research Program |
| SHAS | Service Module |
| SHDN | SHutDowN |
| SHE | Supercritical Helium |
| SHEAL | Shuttle High Energy Astrophysics Laboratory |
| SHERB | Sandia Human Error Rate Bank |
| SHIT | Special High-Intensity Testing |
| SHLB | Simulation Hardware Load Boxes |
| SHLC | Safety, Health, and Leadership Council |
| SHLD | SHieLD |
| SHLDR | SHouLDeR |
| SHOOT | Superfluid Helium On-Orbit Transfer |