| Acronym | Meaning |
 | MDS | Minimum Discernible System |
| BP | C-to-CComputer-to-Computer |
| LOX | Liquid Oxygen (LO2 |
| OAS | Orbiter Avionics System |
| OLF | Orbiter Landing Facility (now SLF) |
| OCS | Onboard Checkout System |
| DECU | Data Exchange Control Unit |
| SDCS | SAIL Data Communications SYstem |
| NPSH | Net Positive Suction Head |
| SCIM | Standard Cubic Inches Per Minute |
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