| Acronym | Meaning |
| NACA | National Agricultural Chemicals Association |
| QC-SCF | Quadratically Convergent SCF (for Closed-shell Systems) |
| ASMO | Antisymmetrical Molecular Orbital |
| ADV | Aleutian Mink Disease Parvovirus |
| EMG | Exponentially Modified Gaussian |
| URG | Umweltrahmengesetz (German Environmental Protection Framework Law) |
| NIRIM | National Institute For Research In Inorganic Materials |
| HWIR | Hazardous Waste Identification Rule |
| SCOWAR | Scientific Committee On Water Research |
| AFID | Alkali Flame Ionization Detector |