| Acronym | Meaning |
| EG | Entry Guidance |
| PCO | Program Controlled Output |
| V/V | Validation And Verification (also V&V) |
| TS | Technical Support (KSC Directorate) |
| GCO | Ground Checkout |
| E | LSSEmergency Life Support System |
| OPR | Office Of Primary Responsibility |
| QCOP | Quality Control Operating Procedure |
| RSS | Range SafetySystem |
| CLS | Contingency Landing Site(s) |