| Acronym | Meaning |
| MEWG | Maintenance Engineering Working Group |
| OPLF | Orbiter Processing And Landing Facility |
| SRT | Special Rated Thrust |
| ORD | Operational Readiness Date |
| USB | Upper Side Band |
| EPO | Element Project Office |
| HD | Hydrogen Drain |
| GPI | Ground Position Indicator |
| P&SM | Procurement And Subcontract Management |
| BRS | Bottom Right Side |