| Acronym | Meaning |
| MST | Multiple Scattering Theory |
| UHF | Unrestricted Hartree-Fock |
| ACEI | Angiotensin Converting Enzyme Inhibitor |
| URG | Umweltrahmengesetz (German Environmental Protection Framework Law) |
| MEAN | Multipole-extracted Adiabatic-nuclei (for Electron-molecule Collisions) |
| RRPA | Relativistic Random Phase Approximation |
| SARM | Synthetic Analytical Reference Matrix (US EPA) |
| BPC | British Pharmaceutical Codex |
| SSGF | Self-consistent Surface Green Function |
| LCC | Leadless Chip Carrier |