| Acronym | Meaning |
| SRT | Shuttle Requirements Traceability |
| FU | Fuel |
| MPSR | Multipurpose Support Room |
| MTO | Maximum Time Out |
| EDV | Electronic Depressurizing Valve |
| R-T | Resistance Test |
| TGO | Time To Go |
| CL | Centerline |
| FIFO | First In-First Out (High Speed Data Buffers) |
| MSLD | Mass Spectrometer Leak Detector |