| Acronym | Meaning |
| SPECM | Scanning Photoelectrochemical And Electrochemical Microscopy |
| LBO | Localized Born-Oppenheimer |
| FP-LMTO | Full-potential Linear Combination Of Muffin-tin Orbitals |
| QMD | Quantum Molecular Dynamics (for Calcns. On The Dynamics Of A Quantum Particle Coupled To A Classical Many-body System) |
| QDA | Quadratic Discriminant Analysis |
| LNO | Localized Natural Orbital |
| EUVID | Extreme UV Imaging Detector |
| REA | Retrospective Exposure Assessment |
| TSI | Trophic State Index |
| CFU | Colony Forming Unit (for Bacteria Counting In Water Disinfection) |