| Acronym | Meaning |
| SCCSA | Self-consistent Central-site Approxn. (for D.-of-states) |
| UCAS-SCF | Unrestricted Complete Active Space Self-consistent Field |
| UAM-IV | Urban Airshed Model Version IV |
| RDGTO | (back-)rotated Distributed Gaussian-type Orbital |
| MCTDH | Multiconfigurational Time-dependent Hartree (theory) |
| KISS | KPNO International Spectroscopic Survey |
| SRP | Soluble Reactive Phosphorus |
| ISE | Iterative Secular Equation (method For Solving The Schroedinger Equation) |
| CEMAS | Complete Element Matrix Analysis From Scattering |
| DSVI | Diluted Sludge Volume Index |