| Acronym | Meaning |
| HLR | Hydraulic Loading Rate |
| MR-CEPM | Multireference-coupled Electron Pair Method |
| MCS | Management Control System |
| DMDHEU | Dimethyloldihydroxyethylene Urea |
| CEIA | Capillary Electrophoresis Immunoassay |
| FKN | Field-Koros-Noyes (mechanism) |
| GDR | Geophysical Data Record |
| DOP | Dissolved Organic Phosphorus |
| SFR | Star Formation Rate |
| IZA | International Zeolite Association |