| Acronym | Meaning |
 | SOS | Serial OutPut Special |
| OPR | Oxygen Pressure Regulator |
| SCA | Schedule Change Authorization |
| RACS | Remote Automatic Calibration System |
| PPS | Pneumatic Power Subsystem |
| CTM | Contract TechnicalManager |
| DDR | Detail Design Review |
| LPS/CDS | LPS/Central Data Subsystem |
| JOR | Job Order Request |
| MDL | Master Data Library |
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