| Acronym | Meaning |
| MLF | MDM Launch Forward |
| MTTR | Mean TimetoRepair |
| SW | Switcher (Switch) |
| SIS | Shuttle Information System |
| M&C | Monitor And Control Panel |
| ECU | Electrical Control Unit |
| CADE | Controller/Attitude-Direct Electronics |
| LPLWS | Launch Pad Lightning Warning System |
| SCA | Schedule Change Authorization |
| LVLH | Local Vertical/Local Horizontal |