| Acronym | Meaning |
| HY-CIVB | Hylleraas-configuration Interaction Valence Bond |
| MHW MO | Mulliken-Helmholz-Wolfsberg Molecular Orbital |
| NAMS | National Air Monitoring Station |
| HTU | Height Of Transfer Unit (in Packed Tower Aeration System) |
| CIS | Commonwealth Of Independent States |
| GVFF | Generalized Valence Force Field |
| SEC | Size Exclusion Chromatography |
| MOPW | Modified Orthogonalized Plane Wave |
| CGC | Constrained Geometry Catalyst |
| CODATA | Committee On Data For Science And Technology |