| Acronym | Meaning |
 | FCPS | Fuel Cell Power System (Subsystem) |
| PWA | Product Work Authorization |
| PMI | Preventive Maintenance Inspection |
| SPADS | Shuttle Problem Action Data System |
| GMT | Greenwich Mean Time |
| UTS | Urine Transfer System |
| EL | Elevation Angle |
| IEP | Instantaneous Effective Photo Cathodes |
| GCV | Gaseous Oxygen Control Valve |
| CSP | ComputerSupportProgram |
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