| Acronym | Meaning |
 | IBM | International Business Machines |
| CHCS | Cabin Humidity Control Subsystem |
| MOF | Manned Orbital Flight |
| SBC | SpeedBrakeCommand |
| SPAD | Subsystem Positioning Aid Device |
| G&NS | Guidance And Navigation Subsystem |
| LOB | Line Of Balance |
| CCW | Counterclockwise |
| PLSS | Portable Life Support System |
| SSS | Stage Separation Subsystem |
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