| Acronym | Meaning |
 | PMC | Payload Monitoring And Control |
| FS | Functional Schematic |
| SIS | Shuttle Information System |
| CBC | Complete Blood Count |
| HRL | Horizontal Reference Line |
| TR/SBS | Teleoperator Retrieval/Skylab Boost System |
| OH | Overhead |
| TSP | Twisted Shielded Pairs (Cables) |
| M | PTPMain Propulsion Test Program |
| GSTAR | General Satellite (ELV) |
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