| Acronym | Meaning |
| VCS | Verification Control Sheet |
| VIS | Verification Information System |
| LDEF | Long Duration ExPosure Facility |
| PM | PMAPerformance Monitor Annunciator |
| SPADS | Shuttle Problem Analysis Data System |
| ESTL | Electronic Systems Test Laboratory |
| NWS | Nose-Wheel Steering |
| EGT | Exhaust Gas Temperature |
| EFTO | Encrypted For Transmission Only |
| MARS | Martin Automatic Reporting System |