| Acronym | Meaning |
 | PREL | Preliminary |
 | MFC | Multiple Flight Controller |
 | CSM | Command Service Module |
 | ICA | Item Change Analysis |
 | FID | Flight Implementation Directive |
 | MTOGW | Maximum Takeoff Gross Weight |
 | PGNCS | Primary G&N And Control System (Subsystem) |
 | MOSPO | Mobile Satellite Photometric Observatory |
 | LDEF | Long Duration ExPosure Facility |
 | THEO | Theoretical |