| Acronym | Meaning |
| HPSAM | H-point Standard Additions Method |
| PTA | Packed Tower Aeration |
| CAEDYM | Computational Aquatic Ecosystems Dynamic Model |
| DV-X(ALPHA) | Discrete Variational-x(alpha) (statistical Exchange Correlation) |
| MPE | Mean Percent Error |
| ARAR | Applicable Or Relevant And Appropriate Standards, Limitations, Criteria, And Requirements |
| IF DRM | Inversion-free Direct Recursion Method (for Surface Electronic Structure) |
| SMA | Specific Methanogenic Activity |
| TERRACE | Terrestrial Runoff Modeling For Risk Assessment Of Chem. Exposure |
| MINI-N | Minimal-type Contracted Gto Basis Set (n= 1 |