| Acronym | Meaning |
 | FDS | Flight Design And Scheduling |
| RAC | ReliabilitY Action Center |
| MEOP | Maximum Expected Operating Pressure |
| VDD | Version Description Document |
| POS | Portable Oxygen System |
| EHC | Electrical Heating Control |
| EVSU | Extravehicular Space Unit |
| CPU | Computer Printer Unit |
| T/L | Transformer Load |
| UB | UpUtility Bridge |
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