| Acronym | Meaning |
| CNDO/FK | Complete Neglect Of Differential Overlap/ Fischer-Kollmar |
| SQG | Small Quantity Generator |
| OMS | Octahedral Molecular Sieve |
| ORV | Optical Retardation Velocity |
| EKT | Extended Koopmans Theorem |
| APMI | American Powder Metallurgy Institute |
| BSR | Bottom Simulating Reflection |
| BCS | Bardeen-Cooper-Schrieffer |
| FEP | Free Energy Perturbation |
| DESY | Deutsches Elektronen-Synchrotron |