| Acronym | Meaning |
| TIP | Temperature-independent Paramagnetism |
| SCEP | Self-consistent Electron-pair Theory |
| MRD-CI | Multireference Determinant Configuration Interaction |
| EXEFS | Extended X-ray Emission Fine Structure |
| UTL | Upper Tolerance Limit |
| GRIMM | Global/Regional Interhemispheric Mercury Model |
| ACID | Acidification Chemistry Information Database |
| MSC | Molecular Simulated Crystal Method (in Compton Profile Calcns.) |
| DMW | Dissimilar-metal Weld |
| VCI | Valence Configuration Interaction (wave Function) |