| Acronym | Meaning |
| MIU | Multiplex Interface Unit |
| FEP | Front End Processor |
| MPSR | Mission Profile Storage And Retrieval |
| OFK | OPtical Flight Kit |
| RTG | Radioisotope Thermoelectric Generator |
| SVC | Supervisor Call |
| RVDT | Rotary Variable Differential Transformer |
| MIMS | Medical Information Management System |
| CAB | Cabinet |
| PGHM | Payload Ground Handling Mechanism |