| Acronym | Meaning |
| PTC | Positive Temperature Coefficient [elec. Conducting Material] |
| TOCOEN | Toxic Organic Compounds In The Environment (research Project In Czechoslovakia) |
| MSA | Mineralogical Society Of America |
| BBFM | Bond-bending Force Model (for Phonon Calcns.) |
| CSP | Computational Singular Perturbation (math Modeling Method) |
| NPDOC | Non-purgeable Dissolved Organic Carbon |
| FEFF | Free Energy Force Field |
| IGT | Institute Of Gas Technology |
| SOMO | Singly Occupied Molecular Orbital |
| ICRMS | Ion Cyclotron Resonance Mass Spectrometry |