| Acronym | Meaning |
 | LSI | Large Scale Integration |
| RFW | Request For Waiver (Deviation) |
| HRDM | High Rate Demultiplexer |
| PBS | Protective Breathing System |
| QSMVT | Quarter Scale Model Vibration Testing |
| LRSI | Low-temperature Reusable Surface Insulation |
| OPF | Orbiter Processing Facility |
| GND | GrGNDGround |
| IC/ES | Intercommunication/Emergency Station |
| ECB | Events Control Buffer |
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