| Acronym | Meaning |
 | GETI | Ground Elapsed Time Of Ignition |
| OSE | Orbiter Support Equipment |
| M | PSS Main Parachute Support Structure |
| MPS | Main Propulsion System (Subsystem) |
| SSDH | Subsystem Data Handbook |
| R | BARRadius Vector Axis |
| OMRC | Operational Maintenance Requirements Catalog |
| FOE | Flight Operations Engineer |
| CTL | Canoga Test Laboratory |
| W/H | Watt-Hour |
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