| Acronym | Meaning |
| IFOT | Invariant Fock Operator Technique |
| VES | Vapor Extraction System |
| KKR-GF | Korringa-Kohn-Rostoker-Green Function |
| NPD | Normal Photoelectron Diffraction |
| CSDW | Centrifugal Sudden (or Coupled States) Distorted Wave (methodfor Reactive Mol. Collisions) |
| PESA | Proton Elastic Scattering Anal. |
| BOA | Bidirectional Orbital Approximation (in Valence Bond Theory) |
| DCFCI | Density-constrained Full-configuration-interaction |
| C.I. | Color Index |
| PSD | Post-source Decay |