| Acronym | Meaning |
 | PROM | Programmable Read-Only Memory |
| MM | Major Mode Or Mass Memory |
| MSF | Manned Space Flight |
| PCVB | Pyro Continuity Verification Box |
| PGA | Power Generating Assembly |
| RTCE | Rotation/Translation Control Electronics |
| HPGS | High Pressure Gas System |
| ENGRG | Engineering |
| GA | Gyro Assembly |
| PTCS | Planning |
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