| Acronym | Meaning |
| ELEC | Electronic |
| MAP | Mission Application Program |
| URN | Urine |
| CALC | Calculate |
| M | Middle |
| PLRD | Payload Requirements Document |
| SRDH | Subsystems Requirement Definition Handbook |
| SMCC | Shuttle Mission Control Center |
| VSI | Video Simulation Interface |
| BYP | Bypass |