| Acronym | Meaning |
 | MIR | Mirror |
| MSS | Multispectral Scanner System |
| EGC | Experiments Ground Computer |
| GPS | Ground Power Supply |
| GRO | Gamma Ray Observatory |
| GA | Glide Angle |
| RFC | Request For Change Revolution |
| HIV | Helium Isolation Valve |
| SPVPF | Shuttle Payload Vertical Processing Facility |
| PATS | Program For Analysis Of Time Series |
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