| Acronym | Meaning |
 | OHA | Operational Hazard Analysis |
| PWMD | Printed Wiring Master Drawing |
| A/L | Air Lock |
| PCU | Payload Checkout Unit |
| PDCR | Proprietary Data Control Record |
| MPS | Main Propulsion System (Subsystem) |
| SST | Single System Trainer |
| FCEI | Facility Contractor End Item |
| MSID | Measurement Stimulation Identification |
| EA | Each |
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