| Acronym | Meaning |
| V | Voice |
| UDS | Universal Documentation System |
| ML | Mold Line |
| MO | Master Oscillator |
| IOCU | Input/Output Control Unit |
| SL-SS | Spacelab Subsystems |
| FCDB | Flight Control Data Bus |
| ELF | Extremely Low Frequency (1 Hz To 3 KHz) |
| VECIB | Vehicle Engineering Change IMplementation Board |
| V&DA | Video And Data (Processing) Assembly |