| Acronym | Meaning |
| PDCS | Power Distribution And Control System (Subsystem) |
| CP | ControlPoint |
| DMIS | Data Management Information System |
| ISL | Inertial Systems Laboratory |
| SIL | Sound Interference Level |
| VDC | Volts |
| VDT | Vehicle Data Table |
| LAN | Local Area Network |
| SUMS | Shuttle Upper-Atmosphere Mass Spectrometer |
| NPL | Normal Power Level (see RPL) |