| Acronym | Meaning |
| EMAP | Environmental Monitoring And Assessment Program (US EPA) |
| SAR | Sodium Absorption Ratio |
| IPIRDW | Independent-process (and) Isolated-resonance (approxn. Using) Distorted Waves |
| ASRL | Atmospheric Sciences Research Laboratory |
| LAOM | Localized At. Orbital Method (in Electronic Structure Calcn.) |
| NLM | Nonlinear Mapping |
| FCM | Finite-cluster Model (for Calcns. On Electromigration) |
| AEGL | Acute Exposure Guideline Level |
| BKC | Born-von Karman Cell (model For Electronic-structure Calcn.) |
| JTU | Jackson Turbidity Unit |