| Acronym | Meaning |
 | O&R | Overhaul And Repair |
| MBC | Maximum Breathing Capacity |
| SMRD | Spin Motor Rotational Detector |
| OPR | Oxygen Pressure Regulator |
| ESTA | Escape System Test Article |
| NARS | National Archives And Record Services |
| APC | Adaptive Payload Carrier |
| IOC | Indirect Operating Costs |
| SDD | Shuttle Design Directive |
| PRD | Procurement Regulation Directive |
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