| Acronym | Meaning |
 | PIECP | Preliminary Impact Engineering Change Proposal |
| CDR | Commander |
| S/A | Subassembly |
| CDS | Closeout DoorSystem |
| GUCP | Ground Umbilical Carrier Plate |
| HLDS | Hydrogen Leak Detection System |
| FCPS | Fuel Cell Power System (Subsystem) |
| TDS | Technology Demonstration Satellite |
| TYP | Typical |
| DO | Discrete Output |
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