| Acronym | Meaning |
| EMES | Electriral |
| SRD | Shuttle Requirements Definition |
| GSCU | Ground Service Cooling Unit |
| LHC | Left Hand Circular |
| MSA | Minimum Surface Area |
| RTOP | Research And Technology Objectives And Plans |
| VCP | Vandenberg Contract Report |
| I | ECO Inboard Engine Cutoff |
| CY | Cycle |
| FTA | Flight Test Article |