| Acronym | Meaning |
 | OBV | Oxidizer Bleed Valve |
| DCSU | Digital Computer Switching Unit |
| DI | Display Interface Processor (Software Functional Element) |
| STRUC | Structure |
| OM | Orbiter Main Engine |
| HOSC | Huntsville Operations Support Center |
| FPEG | Fast Pulse Electron Gun |
| MDA | Main Distribution Assembly |
| MSD | MARS Supplemental Data |
| SAG | E SAILShuttle Avionics Integration Laboratory |
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