| Acronym | Meaning |
 | LUS | Liquid Upper Stage |
| LOT | Lift-Off Time |
| HFTS | Horizontal Flight Test Simulator |
| ISTB | Integrated Subsystem Test Bed |
| FDI | Fault Detection And Isolation |
| UL | Underload |
| WUC | Work Unit Code |
| CEDC | Cyclic Error Detection Code |
| FCOS | Flight Control Operating System |
| BASS | Backup Avionics System Software |
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