| Acronym | Meaning |
| PM3 | Third-parametric Method |
| HFSE | High Field Strength Element(s) |
| RINDO | Rydberg Intermediate Neglect Of Differential Overlap |
| MAK | Maximale Arbeitplatz Konzentration; Maximum Allowed Concentration At Workplace |
| ILL | Interlibrary Loan |
| MASP-HMO | Mutual Additive Substituent Parameter-Hueckel Molecular Orbital |
| HEV | Hepatitis E Virus |
| AQSM | Air Quality Simulation Model |
| SACM | Statistical Adiabatic Channel Method (in Ion-mol. Reactions) |
| FIE | Flow-injection Extraction |