| Acronym | Meaning |
| SCM | Site Configuration Message |
| FI | FlightInstrumentation |
| F/D | Fill/Drain |
| RTLS | Return To Launch Site |
| CCS | Console Communication System |
| SOL | Squelch |
| OT | Operational Instrumentation MDM-Tank |
| SOP | Secondary Oxygen Pack |
| OCRM | Orbiter Crash And Rescue Manuals |
| GRTLS | Glide Return To Landing Site |