| Acronym | Meaning |
 | IWG | Investigator Working Group |
| ELV | Expendable Launch Vehicle |
| TT | Terminal Timing |
| SS | Subsystem |
| MDD | Mate/Demate Device |
| ISTF | Integrated System Test Flow |
| OIA | Orbiter Interface Adapter |
| G/G | Ground-to-Ground |
| VSI | Video Simulation Interface |
| PCT | Percent |
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