| Acronym | Meaning |
| MP2(FU) | MP2(full) Inner-core Electrons Are Included In The Approxn. |
| WELAC | Western European Laboratory Accreditation Cooperation |
| HCO | Heavy Cycle Oil |
| NASQAN | National Stream Quality Accounting Network |
| FPGS | Folylpolyglutamate Synthetasepar |
| MAPK | Mitogen-activated Protein Kinase |
| HAMR | Heat Assisted Magnetic Recording |
| CCA | Coupled-cluster Approach |
| DWCDS | Drinking Water Criteria Documents |
| SHT | Surface Hopping Trajectory (model For Mol. Scattering) |