| Acronym | Meaning |
 | SSAT | SPace Shuttle Access Tower (now FSS) |
| SFWE(M) | Static Feed Water Electrolysis (Module) |
| IMU | Internal Measurement Unit |
| RECS | Representative Shuttle Environmental Control System |
| IPS | Interconnecting Station |
| TL | Thrust Level |
| RECONFIG | Reconfiguration |
| ET-SEP | External Tank Separation |
| DISTR | DIUDynamic Integrated Test |
| SEOS | Synchronous Earth Observation Satellite |
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