| Acronym | Meaning |
| RTD | Residence Time Distribution |
| MCD | Magnetic Circular Dichroism |
| CTA | Classical Trajectory Approximation (in Mol.-collision Calcns.) |
| THRASH | Thorough High Resolution Analysis Of Spectra By Hornf1fs |
| FEG | Field Emission Gun |
| BCS | Bardeen-Cooper-Schrieffer |
| QCD | Quantum Chromodynamics |
| CAS-CI | Complete Active Space-configuration Interaction |
| TCID50 | 50% Tissue Culture Infective Dose |
| ELDOR | Electron Double Resonance |