| Acronym | Meaning |
 | LUS | Liquid Upper Stage |
 | COM-M | Common Mode |
 | SMCS | Separation Monitor And Control System |
 | SLE | ERNO Spacelab Engineering |
 | SURF | Surface |
 | VFI | Verification Flight Instrumentation |
 | DBGMP | DBIUData Bus Interface Unit |
 | DBGMP | Data Bus Isolation Amplifier |
 | CDI | Course Deviation Indicator |
 | PROP | Proportioning |