| Acronym | Meaning |
 | DCR | Document Change Record (or Review) |
| IFRU | In-Flight Replacement Unit |
| LAIU | Launch Abort Interface Unit |
| BSC | Brake Skid Controller |
| ITC | Igloo Thermal Control |
| PSS | Payload Specialist Station |
| SOL | Solenoid |
| OT | Operational Test |
| OAS | Orbiter Atmospheric Simulator |
| IF | Integration Facility |
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