| Acronym | Meaning |
| P | Primary |
| COAS | Crew(man) Optical Alignment Sight |
| MDM | Multiplexer/Demultiplexer |
| GPAS | General PurPose Airborne Simulator |
| DUPLXR | Duplexer |
| QCOP | Quality Control Operating Procedure |
| CS | STS Cargo Operations (KSC Directorate) |
| GACU | Ground Avionics Cooling Unit |
| CES | Control Electronics System |
| F/F | Fill/Full |