| Acronym | Meaning |
| IESWTR | Interim Enhanced Surface Water Treatment Rule |
| SEE | Standard Error Of Estimate |
| FPC | Fixed Partial Charge |
| TBSI | N-tert-butyl-2-benzothiazyl Sulfenimide |
| SEM | Scanning Electron Microscopy |
| PWO | Plane Wave Orbital |
| SPA | Separated Pair Approxn. (wave Function) |
| OPE | Operator Product Expansion |
| IADN | Integrated Atmospheric Deposition Network |
| IFW | Image File Wrapper |