| Acronym | Meaning |
 | OPR | Oxygen Pressure Regulator |
| VMS | Velocity Measuring System |
| PDCR | Proprietary Data Control Record |
| SDF | Single Degree Of Freedom |
| CGSS | Cryogenic Gas Storage Subsystem |
| KSC | John F. Kennedy Space Center |
| FF | Flight Forward |
| FCA | Functional ComPatibility Analysis |
| BACS | Body Axis Coordinate System |
| QUAD | Quandrangle |
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