| Acronym | Meaning |
 | PALS | Precision Approach And Landing SYstem |
| SLS | Spacelab Simulator |
| DERIGID | Derigidize |
| BFCS | Backup Flight Control System |
| MDCS | Material Data Collection System |
| FF | Flip Flop |
| OLDR | Quick Look Data Reference |
| SHF | Super High Frequency |
| SSC | Shuttle System Contractor |
| QATT | Qualification For Acceptance Thermal Testing |
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