| Acronym | Meaning |
| PK | Peak (Valve) |
| GHE | Gaseous Helium |
| HLAL | High Level Assembler Language |
| MFR | Manipulator Foot Restraint |
| DDU | Decommutator Distribution Unit |
| PMC | Private Medical Communication |
| TTC | Telemetry |
| PB | Pushbutton |
| ICR | Instruction Change Request |
| LMS | Load Measurement System |