| Acronym | Meaning |
 | OMRC | Operational Maintenance Requirements Catalog |
| FWB | Fahrenheit Wet Bulb |
| VAC | Vehicle Assembly And Checkout |
| PGHM | Payload Ground Handling Mechanism |
| DL | Electronics Engineering (KSC DE Dir.) |
| HEAP | High Energy Aim Point |
| RCS | Reaction Control System (Subsystem) |
| N204 | Nitrogen Tetroxide |
| O | Engineering Order |
| IUS | Interim/intermediate UPper State |
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