| Acronym | Meaning |
| SCB | Selector Control Box |
| PSI | Power Static Inverter |
| OSTO | Office Of Space Transportation Operations |
| R | LEO Request Liaison Engineering Order |
| VMS | Velocity Measuring System |
| CUF | Cross Utilization File |
| ASE | Airborne Support Equipment |
| DCSI | Data And Cqntrol Signal Interface |
| FIFO | First In-First Out (High Speed Data Buffers) |
| TDP | Temperature And Dewpoint |