| Acronym | Meaning |
 | SV | Safety Valve |
| MA | Missed Approach |
| SPCC | STS Processing Control Center |
| EEIS | End-to-End Information System |
| PDR | Preliminary Data Requirements |
| LLS | Launch And Landing Site |
| GFD | Government Furnished Data |
| LS | Launch Sequence |
| OPSS | Orbital Propellant Storage Subsystem |
| HO | Hydrogen-OxYgen |
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