| Acronym | Meaning |
 | RANN | Research Applied To National Needs |
| DRT | Design Reference Timeline |
| ISL | Inertial Systems Laboratory |
| FRP | Fuselage Reference Plane |
| FMOF | First Manned Orbital Flight |
| FSS | Flight Support System |
| ERBS | Earth Radiation Budget Satellite |
| SFTA | Structural Fatigue Test Article |
| PAYDAT | Payload Data |
| MCT | Maximum Climb Thrust |
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