| Acronym | Meaning |
 | TTA | Time To Apogee |
| HSI | Horizontal Situation Indicator |
| SAB | Storage And Assembly Building |
| DCS | Design Communication System |
| QD | Quick Disconnect |
| FQR | Flight Qualification Review |
| BC | Bus Coupler |
| TVCS | Thrust Vector Control System |
| R | ETSReconfigurable Electrical Test Stand |
| DDI | Discrete Data Input |
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