| Acronym | Meaning |
| MEMTB | Many-electron Mol. Tight-binding (for Electronic Structures) |
| QLUC | Quasimolecular Large Unit Cell (model For Electronic-structure Calcns. On Solids) |
| DFAA | Dissolved Free Amino Acids |
| FOSFA | Federation Of Oils |
| MNDO-HE | Modified Neglect Of Diatomic Overlap-half Electron |
| SIAM | Single-impurity Anderson Model |
| AWQC | Ambient Water Quality Criteria |
| ADME | Absorption |
| MTD | Maximum Tolerated Dose |
| AWWA | American Water Works Association |