| Acronym | Meaning |
 | PETS | Payload Environmental Transportation System |
| MIP | MMU Integration Plan |
| PCG | Phonocardiogram |
| TG | Ground Systems (KSC Directorate) |
| GECALL | GCOS Program Element Name |
| RAM | Responsibility Assignment Matrix |
| NSD | NASA Standard Detonator |
| PCR | Payload Changeout Room |
| OPF | Orbiter Processing Facility |
| GT | Greater Than |
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