| Acronym | Meaning |
| NPAS | Network Planning And Analysis System |
| UICP | Uniform Inventory Control Program |
| AOG | Augmented Offgas |
| SIR | Shuttle Imaging Radar |
| PRUDENCE | Prediction Of Regional Scenerios And Uncertainties For Defining European Climate Change Risks And Effects |
| FORGE | Funds For Overseas Research Grants For Education |
| DXF | Data Exchange Format |
| TCSM | Tropospheric Chemistry Systems Models |
| ATC | Air Traffic Control |
| ETE | Estimated Time En Route |