| Acronym | Meaning |
 | SCN | Specification Change Notice |
| OEX | Orbiter Experiments |
| HIPO | Hierarchy Plus InPut/Process/Output |
| TFU | Test Facility Utilization |
| N | Neutrons |
| VF | Vertical Flight |
| SRD | SYstems Requirements Document |
| USS | Utility Support Structure |
| SSIS | Space Station Information System |
| CDF | Circuit Design Fabrication |
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