| Acronym | Meaning |
| IDU | Interface Demonstration Unit |
| RFA | RF Authorization (Frequency) |
| SPI | Surface Position Indicator |
| SRU | ShOP-Replaceable Unit |
| NUL | Non-GSE Utilization List |
| CPL | Couple |
| CIRHS | Critical Items And Residual Hazards List |
| MA | Multiple Access |
| PIC | Pyro Initiator Controller |
| SATAF | Shuttle Activation Task Force |