| Acronym | Meaning |
| USCM | Unified Solvation Cavity Model |
| HCA | Hazardous Communication Act |
| DSW | Dirac Scattered-wave (often As SCF-X(alpha)-DSW Method) |
| ILWAS | Integrated Lake Water Acidification Study |
| HGDB | Hydrogeologic Database |
| LLE | Liquid Liquid Extraction |
| SCWO | Supercritical Water Oxidation |
| ICL | Interface Control Layer |
| WDD | Weighted Density Distribution |
| DNO | Delocalized Natural Orbital |