| Acronym | Meaning |
 | VVI | Vertical Velocity Indicator |
| DDU | Decommutator Distribution Unit |
| PRE-MOD | Premodulation |
| MI | Management Information |
| CP | ControlPoint |
| MDR | Mission Data Reduction |
| FSTE | Factory Special Test Equipment |
| QATT | Qualification For Acceptance Thermal Testing |
| RCCA | Rough Combustion Cutoff Assembly |
| EVSU | Extravehicular Space Unit |
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