| Acronym | Meaning |
| M+R | Time In Days Before Move Operations |
| RE&T | Research Engineering And Test |
| MSC | Materials Service Center |
| SIR-A | Shuttle Imaging Radar@A |
| EPSP | Experiment Power Switching Panel |
| HAL | High Order Articulated Language |
| D&P | Drain And Purge |
| SSI | Significant Structural Item |
| TTG | Time To Go |
| MTOGW | Maximum Takeoff Gross Weight |