| Acronym | Meaning |
| DTA | Direct Toxicity Assessment (of Wastewater Discharges) |
| ISVM | Iterative Schwinger Variational Method |
| SOD | Sediment Oxygen Demand |
| MACHO | Massive Compact Halo Object |
| TDA | Tamm-Dancoff Approximation |
| TSLLE | Thermospray Liquid-liquid Extraction |
| LIPM | Laser Integrating Plate Method |
| FEMO | Free-electron Molecular Orbital |
| RVP | Reid Vapor Pressure (used For Gasoline Volatility) |
| GSA | Geological Society Of America |