| Acronym | Meaning |
| FCHF | Frozen-core Hartree-Fock |
| DWRF | Drinking Water Research Foundation |
| SLPI | Secretory Leukocyte Protease Inhibitor |
| HWHM | Half Width At Half-maximum |
| SARM | Selective Androgen Receptor Modulator |
| PTEAM | Particle Total Exposure Assessment Methodology |
| ULFM | Unified Ligand Field Model (for Mol. Electronic Energies) |
| GMISS | Gridded Model Information Support System |
| CGIAR | Consultative Group On International Agricultural Research |
| RCHF | Relaxed-core Hartree-Fock (approxn. In Calcns. On Mol. K-shell Excitation Spectra) |