| Acronym | Meaning |
 | JCT | Junction |
| GCU | Ground Cooling Unit |
| DK | Deck |
| UPS | Uninterruptible Power Supply |
| GSSC | Ground Support Simulation Computer |
| REM | Roentgen Equivalent In Man |
| POP | Perpendicular-to-Orbit Plane |
| OTL | Ordnance Test Laboratory |
| GP | GeGP General Publication (RSC) |
| MM | Math Model |
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