| Acronym | Meaning |
 | PFC | Preliminary Flight Certification |
| CHL | Channel |
| SPIDPO | Shuttle Payload Integration And Development Progra |
| FBC | Fluidized-Bed Combustion |
| S&A | Safe And Arm (Device) |
| M | Million |
| O&C | Operation(s) And Checkout (Building-was MSOB) |
| CCTV | Closed Circuit Television |
| IWG | Interface Working Group |
| P&M | Phase Modulation (Modulated) |
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