| Acronym | Meaning |
| SCSA | Small-curvature Semiclassical Adiabatic (approxn. For Mol. Energy Levels) |
| FRS | Forward Recoil Spectrometry |
| MBRSPT | Many-body Rayleigh-Schroedinger Perturbation Theory |
| ENSO | El Nino Southern Oscillation |
| CNDO/F | Complete Neglect Of Differential Overlap/force |
| ASCA | Advanced Satellite For Cosmology And Astrophysics |
| CPMC-SCF | Coupled Perturbed Multiconfigurational SCF |
| DQ-MBPT | Double And Quadruple Excitation Diagrams In Many-body Perturbation Theory |
| WOUDC | World Ozone And UV Data Center |
| MW | Molecular Weight |