| Acronym | Meaning |
 | RCY | Remaining CYcles |
| QTR | Qualification Test Report |
| NLG | Nose Landing Gear |
| CIB | Change Impact Board |
| ETS | External Tank System (Subsystem) |
| CONUS | Continental United States |
| SHERB | Sandia Human Error Rate Bank |
| PCM | Punch Card Machine |
| COD | Center Operations Directorate (JSC) |
| IACS | Inertial Attitude Control System |
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