| Acronym | Meaning |
 | CRR | Computer Run Report |
| EDS | Electrical Distribution System |
| IUS | Inertial UPper Stage (was Interim UPper Stage) |
| GCS | Ground Communications System |
| LPG | Liquid Propellant Gun |
| HSL | Hardware Simulation Laboratory |
| FRSI | Flexible Reusable Surface Insulation |
| RS | Right Side |
| SM | Support Module |
| BP | Boilerplate |
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