| Acronym | Meaning |
| RSPT | Rayleigh-Schroedinger Perturbation Theory |
| FASSST | FAst Scan Submillimeter Spectroscopy Technique |
| FIS | Field Ion Spectroscopy |
| PP | Pariser Parr |
| MBE | Many-body Expansion (in Mol. Potential Energy Surface Calcn.) |
| VRM | Viscous Remanent Magnetization |
| ISC | Short-circuit Current |
| TPW | Transformed Plane Wave Method |
| QCMD | Quantum-classical Mol. Dynamics |
| CPHSDM | Constant Pattern Homogeneous Surface Diffusion Model |