| Acronym | Meaning |
 | SAEF | Spacecraft Assembly And Encapsulation Facility (KSC) |
| PCMS | Pulse-Code Modulation Shared |
| MGE | Maintenance Ground Equipment |
| SPD | R Software Preliminary Design Review |
| OPF | Orbiter Processing Facility |
| N/C | Normally Closed |
| VDA | Valve Driver Assembly |
| MSK | Manual Select KeYboard |
| FCMU | Foot Controlled Maneuvering Unit |
| PM | Payload Midbody |
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