| Acronym | Meaning |
| UL | Underload |
| ELDV | Electrically Operated Depressurization Valve |
| CSAT | Combined Systems Acceptance Test |
| OA | Office Of Applications (now OSTA) |
| RSI | Reusable Surface Insulation |
| SRS | Simulated Remote Station |
| VIB | Vibrate |
| FHD | Fixed Head Disk |
| SRT | Special Rated Thrust |
| RSD | Requirements And Specifications Document |