| Acronym | Meaning |
 | MG | Mobile Generator |
| SSPM | Space Shuttle Program Manager |
| RSMM | Redundant System Monitor Model |
| DCSU | Digital Computer Switching Unit |
| ROM | Rough Order Of Magnitude |
| EML | Electromagnetic Laboratory |
| LCD | LaunchCountdown |
| CKS | Checks |
| REM | Release Engine Mechanism |
| RT | Real Time (R/T Preferred) |
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