| Acronym | Meaning |
| CAU | Command Acquisition Unit |
| VR | Velocity Relative |
| PID | Program Introduction Document |
| BP | C/PCold Plate |
| DCC | DCCUDigital Command And Control Unit |
| LPS | Liters Per Second |
| FY | Fiscal Year |
| SRDH | System Requirements Definition Handbook |
| HCSI | Hughes Communications Services |
| OHGVT | Orbiter Horizontal Ground Vibration Test |