| Acronym | Meaning |
 | RAD | Radian |
| SEC | Secondary |
| MPMSE | Multiuse Payload And Mission Support Equipment |
| MSEC | Master Separation Events Controller |
| RATCC | Radar Air Traffic Control Center |
| SO | SuPport Operations (KSC Dir.) |
| NSS | Nitrogen Supply Subsystem |
| ULL | Ullage |
| GSDL | Ground Software Development Laboratory |
| PIC | Pyro Initiator Capacitors |
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