| Acronym | Meaning |
 | CI | Continuous Interlock |
| E | LSCEarth Landing Sequence Controller |
| SCA | Sequence Control Assembly |
| PSP | Payload Support Plan |
| TSGP | Test Sequence Generator Program (ESTEC) |
| VGY | Velocity To Be Gained (Body Y-Axis) |
| SL-SSS | Spacelab Subsystem(s) Segment |
| GNCIS | GNGNCISGN&C Integration Simulator |
| DDU | Display Driver Unit |
| MI | Mechanical Joint |
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