| Acronym | Meaning |
 | RTCP | Real-Time Communications Processor |
| MDA | Main Distribution Assembly |
| LOP | In-Orbit Plane |
| GCILU | Ground Control Interface Logic Unit |
| CRD | Change Request Disposition |
| IC/ES | Intercommunication/Emergency Station |
| RACU | Remote Acquisition And Command Unit |
| MCR | Master Change Record |
| IOE | Input/Output Error Log Table |
| RAX | Remote Access Terminal |
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