| Acronym | Meaning |
 | TWD | Twisted Double Shielded |
| CU | Control Unit |
| MMCA | Midbody Motor Control Assembly |
| MPSR | Mission Profile Storage And Retrieval |
| LPR | Line Printer |
| SAR | Search And Rescue |
| FACT | Flexible Automatic Circuit Tester |
| T/TCA | Thrust/Translation Control Assembly |
| EDS | Emergency Detection System |
| MO | Master Oscillator |
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