| Acronym | Meaning |
 | SSM | BSpace Shuttle Maintenance Baseline |
| E/W | Energy To Weight Ratio |
| MTBR | Mean Time Between Replacement |
| MSS | Mission Specialist Station |
| S/R | Shift Register |
| MSB | Most Significant Bit |
| FCA | Forward Controller Assembly |
| STCP | Short-Term Cost Plan |
| POP | Perpendicular-to-Orbit Plane |
| TPM2 | Terminal Phase Midcourse #2 |
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