| Acronym | Meaning |
 | VMS | Vertical Motion Simulator |
| BFS | Backup Flight System |
| PDRS | Payload Deployment And Retrieval System |
| UTC | Coordinated Universal Time |
| MIMR | Multifrequency Imaging Microwave Radiometer |
| LOX | Liquid OXygen |
| M | Messier |
| NBS | National Bureau Of Standards |
| XMM | X-ray Multi Mirror |
| TDRSS | Tracking And Data Relay Satellite System |
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