| Acronym | Meaning |
 | RIV | Recirculation Isolation Valve |
| FDRI | Flight Director Rate Indicator |
| PMIA | Parallel Multiplexer Interface Adapter |
| SOLS | Spacelab/Orbiter Interface Simulator |
| MOD | Module |
| NFSP | NNFSPNonflight Switch Panel |
| VAK | Vertical Assembly Kit |
| MTEM | Maintenance Test Equipment Module |
| DISC | Disconnect |
| NSP | Network Signal Processor |
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