| Acronym | Meaning |
| NAWQA | National Water Quality Assessment (US Geological Survey) |
| HIPCO | High-pressure Carbon Monoxide |
| EFIN | Environmental Financing Information Network |
| TEMIS | Total Emissions Model For Integrated Systems |
| POP | Persistent Organic Pollutant |
| ELF | Electron Localization Function |
| ODFS | Optimized Dirac-Fock-Slater |
| MOUSE | Method Of Underground Solute Evaluation |
| EPI | Echo-planar Imaging |
| ASPEN | Assessment System For Population Exposure Nationwide |