| Acronym | Meaning |
| SO-LAPW | Spin-orbit (coupling) Linearized Augmented Plane Wave |
| ADOM | Acid Deposition And Oxidant Model (air Pollution) |
| VU-CCSD/R | Valence Universal-coupled Cluster (with) Single (and) Double (excitations) (r = Radial Components Of The Cluster Amplitudes) |
| FLD | Forming Limit Diagram |
| SDG | Signed Directed Graph (model) |
| CNDO/2-V | Complete Neglect Of Differential Overlap-potential Method |
| CPSS | Chemist's Personal Software Series |
| LT1ESWTR | Long Term 1 Enhanced Surface Water Treatment Rule |
| CAIR | Comprehensive Assessment Information Rule (USEPA) |
| ACI | Acceptable Chronic Intake |