| Acronym | Meaning |
 | SCM | Site Configuration Message |
| S&E | Science And Engineering (MSFC Directorate) |
| NEG | Negative |
| HCED | Hand Controller Engage Driver |
| SAR | Search And Rescue |
| S/R | Shift Register |
| MDCS | Malfunction Display And Control System |
| TSCO | Test Support Coordination Office |
| ECC | Engineering Critical Component |
| PROM | Progammable Read-only Memory |
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