| Acronym | Meaning |
 | MPSR | Multipurpose Support Room |
 | POPA | PaYload Ordnance Processing Area |
 | POI | Propellant Quantity Indicator |
 | DCOP | Displays |
 | LRF | Liquid Rocket Fuel |
 | LEA | Logistics Engineering Analysis (Analyses) |
 | DMSS | Data Management System Simulator (CVT) |
 | GS | Gas Servicer |
 | FLG | Flange |
 | SSPDA | Space Shuttle Payload Data Activity |