| Acronym | Meaning |
 | DIA | Diameter |
 | CAL | Calibrate |
 | ESVS | Escape Suit Ventilation System |
 | TBN | To Be Negotiated |
 | TT | Total Time |
 | ESCU | Extended Service And Cooling Umbilical |
 | EHC | Electrical Heating Control |
 | MDAS | Mission Data Acquisition System |
 | EDC(M) | Electrochemical DePolarized CO (Module) |
 | GP | General Purpose |