| Acronym | Meaning |
 | PQGS | Propellant Quantity Gaging System |
 | S-N | Stress Number |
 | PMPL | Preferred Mechanical Parts List |
 | DIPL | Display Initial Program Load |
 | CS | Consumables Status |
 | CGAU | Cabin Gas Analysis Unit |
 | EVCS | Extravehicular Communications System |
 | SC | Scale |
 | VEEI | Vehicle Electrical Engine Interface |
 | IDRD | Information Definition Requirements Document |