| Acronym | Meaning |
| CPA | Coherent Potential Approximation |
| WSHS | Watershed Hydrologic System |
| ELRA | Enzyme-linked Receptor Assay |
| TLM | Triple Layer Model (of Adsorption) |
| AS | Air Stripping |
| SCOP | Spherical Complex Optical Potential (in Quantum Calcn. On Mol. Scattering) |
| GIT | Gastrointestinal Tract |
| (PI)SDCI | (pi)-electron Singly And Doubly Excited CI |
| TDFM | Two-surface Dirac-Frenkel-Mclachlan (variational Method) |
| ACNK | Al2O3/(CaO + Na2O + K2O) |