| Acronym | Meaning |
 | VMS | Velocity Measuring System |
| OPO | Orbiter Project(s) Office |
| MODEM | Modulator-Demodulator |
| ESVS | Escape System Ventilation System |
| FRT | Flight Readiness Test |
| RTLS | Return To Launch Site |
| PLSS | Primary Life SuPport Subsystem |
| MCN | Master Change Notice |
| TVEXPIS | TV Experiment Interconnecting Station |
| SPE | Solid Polymer Electrolysis |
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