| Acronym | Meaning |
| TC | Temperature Compensating |
| NTP | Normal Temperature And Pressure |
| PC | Pitch Control |
| PBL | Payload Bay Liner |
| HGDS | Hazardous Gas Detection System |
| PIP | Project Implementation Plan |
| ET | External Tank |
| COQ | Certificate Of Qualification |
| BCRD | Basic Consolidated Requirements Document |
| IVSI | Instantaneous Vertical Speed Indicator |