| Acronym | Meaning |
| ENSO | El Nino Southern Oscillation |
| SBMO | Subjacent Molecular Orbital |
| SEVB | Semiempirical Valence Bond |
| ECP-CPP | Effective Core Potential (augmented By)-core Polarization Potential |
| VSMOW | Vienna Standard Mean Ocean Water |
| IGFA | Inert Gas Fusion Analysis |
| CET | Collisional Energy Transfer |
| GTG | Gaussian-type Geminal |
| AU | Absorbance Units |
| LCMTO | Linear Combination Of Muffin-tin Orbitals |