| Acronym | Meaning |
| EP TOX | Extraction Procedure Toxicity Test (USEPA Method) |
| SIC | Self-interaction Correction (in Exchange-energy Calcns.) |
| MDPE | Medium-density Polyethylene |
| NPDES | National Pollutant Discharge Elimination System |
| FOPIM | First Order Perturbation Iteration Method |
| WINDEP | Worksheet-Integrated Deposition Estn. Program |
| CFP | Coefficient Of Fractional Parentage (method In Quantum Calcns.) |
| PTA | Packed Tower Aeration |
| PCA | Principal Component Analysis |
| GEXRF | Grazing-emission X-ray Fluorescence |