| Acronym | Meaning |
 | FSO | Functional Supplementary Objective |
| SIR | Shuttle Imaging Radar |
| IFOT | In-Flight Operations And Training |
| RV | Recovery Vehicle |
| DBGMP | DBMDecibels Referred To I Milliwatt |
| RBN | Radio Beacon |
| EDS | Electrical Distribution System |
| ISS | Installation Support Services |
| GPAS | General PurPose Airborne Simulator |
| COMP | Component |
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