| Acronym | Meaning |
 | PCTO | Payload Cost Tradeoff Optimization |
| CUDS | Cumulative Data Statistics |
| BUOU | Backup Optical Unit |
| MIOS | Multi-IMU Operation System |
| IMP | Initial Memory Protection |
| PGA | Programmable Gain Amplifier |
| PAM | Pulse Amplitude Modulation |
| MV | Manual Valve |
| OOS | Orbit-to-Orbit Stage |
| SCU | Sequence Control Unit |
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