| Acronym | Meaning |
| S/AC | Stabilization/Attitude Control |
| MJCA | Midbody Jettison Control Assembly |
| VTVM | VacuumTubeVoltmeter |
| TW | Traveling Wave |
| LVDT | Linear Variable Differential Transformer |
| FQR | Flight Qualification Recorder |
| CCATS | Command |
| SMCS | Separation Monitor And Control System |
| MTGW | Maximum Total Gross Weight |
| REI | Range From Entry Interface (400 K) |