| Acronym | Meaning |
| IAM | Independent Atom Model |
| SEAM | Superfund Exposure Assessment Manual |
| PMO | Perturbational Molecular Orbital |
| ILWAS | Integrated Lake Water Acidification Study |
| ROSE | Remote Optical Sensing Of Emissions |
| TIME | Temporally Integrated Monitoring Of Ecosystems |
| EQO | Environmental Quality Objective |
| STP | Similarity Transformation (based) Perturbation (theory) |
| RFA | Retarding Field Analyzer |
| HMTUSA | Hazardous Materials Transportation Uniform Safety Act |