| Acronym | Meaning |
| OBS | Operational Bioinstrumentation System |
| TCR | Test Compare Results |
| MDS | Minimum Discernible System |
| FSRS | Flight System Recording System |
| LUCS | Instrumentation Unit Update Command System |
| LFOP | Landing And Ferry Operations Panel |
| CCN | Contract Change Negotiation |
| TF | Test Facility |
| P | Pilot |
| NGM | NNGM Nitrogen Generation Module |