| Acronym | Meaning |
 | SIM | Scientific Instrumentation Module |
| MEIU | Main Engine Interface Unit |
| PRB | PasoRobles(TACANStation) |
| WA | Work Authorization |
| NIDS | NNIDSNetwork Interface Data System |
| OPSS | Orbital Propellant Storage Subsystem |
| PRPS | Programming Requirements Process Specification |
| STP | Self-Test Program |
| PEG | Powered Explicit Guidance |
| CW | Command Word |
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