| Acronym | Meaning |
| MSU | Mass Storage Unit |
| VOR | VHF Omnidirectional Radio Range |
| DEACT | Deactivate |
| CTN | Certification TestNetwork |
| MSG | Mechanical Subsystem Group |
| DOT | Department Of Transportation |
| PIP | Payload Integration Plan |
| MDS | Mission Development Simulator |
| DRR | Data Recorder/Reproducer |
| PSSU | Patch Survey And Switching Unit |