| Acronym | Meaning |
| CCW | Counterclockwise |
| MO | Middeck Overhead |
| MEP | Mean Effective Pressure |
| PGR | SPacelab Planning And Ground Rule |
| ET-SEP | External Tank Separation |
| IDTA | Interdivisional Technical Agreement |
| PALS | Photo Area And Location SYstem |
| PM | PMADPerformance Monitor Annunciation Driver |
| IOC | Initial Operational Capability |
| TSS | TPS Summary Sheet Control |