| Acronym | Meaning |
| DRIS | Double Resonance Ionization Spectroscopy |
| MSPO | Method Of Successive P |
| EM | Electron Microscopy |
| FRSS | Federal Register Search System |
| SPRI | Surface Plasmon Resonance Imaging |
| FV-MC-SCF | Full Valence Multiconfiguration Self-consistent Field |
| GANC | Generalized Acid Neutralization Capacity Test |
| ALTER | Acceptable Long-term Exposure Range |
| MTTP | Maximum Total Trihalomethane Potential |
| LCVO | Linear Combination Of Valence Orbitals |