| Acronym | Meaning |
| IMP | Initial Memory Protection |
| PDI | Payload Data Interleaver |
| RTAC | Research And Technology Advisory Committee |
| SID | Shuttle Integration Device |
| EAR | Engineering AnalYsis Report |
| NB | Niobium |
| M | LAMonochrome Lens Assembly |
| EPROM | Erasable Programmable Read Only Memory |
| GRN | Green |
| HVPS | High Voltage Power Supply |