| Acronym | Meaning |
| TC | Time To Circular |
| WWMS | Waste Water Management System |
| MS | Margin Of Safety |
| IPDR | Incremental Preliminary Design Review |
| SILTS | Shuttle Infrared Leeside Temperature Sensing |
| NLG | Nose Landing Gear |
| FERD | Facility And Equipment Requirements Document |
| SIES | Supervision |
| AIRS | Atmospheric Infrared Sounder |
| TBA | To Be Added |