| Acronym | Meaning |
| REGEN | Regenerate |
| GECALL | GCOS Program Element Name |
| S&AD | Science And Applications Directorate |
| MS | Mission Station |
| LEM | Laboratory Environment Model |
| MPMSE | Multiuse Payload And Mission Support Equipment |
| FOF | First Orbital Flight |
| OFI | Operational Flight Instrumentation |
| SACS | SYstems AllocationDocument |
| MESC | Master Events Sequencer Controller |