| Acronym | Meaning |
 | MPS | Main Propulsion System (Subsystem) |
| M | Icom Missile Command (Army) |
| VCE | Voice |
| OAA | Orbiter Alternate Airfield |
| HRSI | High Temperature Reusable Surface Insulation |
| ECS | Environmental Control System (Subsystem) |
| CC | Crew(s) Certified |
| CMSI | Checkout/Control And Monitor Subsystem Interface |
| SM | IASerial Multiplexer Interface Adapter |
| ORR | Operations Requirements Review |
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