| Acronym | Meaning |
 | SCN | Specification Change Notice |
| SW/PM | System Management/Performance Monitor |
| ODCDR | Orbiter Delta CDR |
| OAL | Overall Level |
| FDRI | Flight Director Rate Indicator |
| FAR | Federal Aviation Regulation |
| ORS | Orroval Valley |
| MPG | Multipoint Grounding |
| MCL | Master Configuration List |
| IECS | Igloo Environment Control Subsystem |
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