| Acronym | Meaning |
| CART | Cloud And Radiation Testbed |
| EFS | Elec. Field Stimulation |
| ORP | Oxidation-reduction Potential |
| QSMR | Quantitative Structure-metabolism Relationship |
| MUSIC | Multiplicity Selective In-phase Coherence Transfer |
| CPCCSD | Coupled-perturbed Coupled-cluster (with) Single (and) Double Excitation |
| PIMIA | Potentiometric Ionophore-modulation Immunoassay |
| EPA | Environment Potential Approach (in Electronic-structure Calcn.) |
| ESS | European Spallation Source |
| EPA | Environmental Protection Authority (Australia) |