| Acronym | Meaning |
| OPACA | Organotin Paint Control Act Of 1988 (US) |
| FEM | Free Electron Model |
| ERM | Electron Redistribution Model |
| CCIIM | Clearinghouse For Chemical Information Instructional Materials |
| TSD | Treatment, Storage, Or Disposal |
| IRC | Information Resource Center |
| PCI | Positive-ion Chemical Ionization (mass Spectrometry) |
| VERI | Visual-empirical Region Of Influence |
| RDF | Restricted Dirac-Fock (quantum Calcn. Method) |
| CHEC | Commonwealth Human Ecology Council |