| Acronym | Meaning |
| SIMFAC | Simulation Facility |
| IPR | Interim Problem Report |
| TCS | Thermal Control System (Subsystem) |
| FPBOV | Fuel Preburner And Oxidizer Valve |
| CES | Crew Escape System |
| RFEI | Request For Engineering Information |
| EFTO | Encrypted For Transmission Only |
| BP | C/0Changeout |
| NAS | National Aircraft Standard |
| OPIDF | Operational Planning Identification File |