| Acronym | Meaning |
 | EBS | Emergency Breathing Subsystem |
| QSM | Quarter Scale Model |
| HHMU | Hand Held Maneuvering Unit |
| SAU | Signal Acquisition Unit |
| CSC | Contingency SuPport Center (CCAFS) |
| DAV | L Data Available-Low |
| OT | Optical Tracker |
| SPAS | Shuttle Pallet Satellite (German) |
| USRA | Universities Space Research Association |
| SRU | Shop Replacement Unit |
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