| Acronym | Meaning |
 | BCE | Backup Control Electronics |
| PMC | Plutona-Molybdenum Cermet |
| RICC | Remote Intercomputer Communications Interface |
| TWX | Teletype Wire Transmission |
| CHR | Cooper-Harper Rating |
| CRN | Cable Routing Rotation |
| PIU | Pyrotechnic Initiator Unit |
| GG | Gas Generator |
| IPS | IRIG Inertial Rate Integrating Gyro |
| LC | LaunchCountdown |
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