| Acronym | Meaning |
 | SR | Shift Register |
| RECS | Representative Shuttle Environmental Control System |
| PVA | Propellant Valve Actuator |
| KATS | Kennedy Avionics Test Set |
| PTT | Push-to-Talk |
| SPG | Signal Point Ground |
| VC | Vector Character |
| M&R | Maintenance And Refurbishment |
| PHSF | Payload Hazardous Servicing Facility |
| DIPEC | Defense Industrial Plant Equipment Center |
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