| Acronym | Meaning |
| GLO | Gaussian Lobe Orbital |
| HKS | Hohenberg-Kohn-Sham (quantum Theory) |
| CCSA | Classical Cintrifugal-sudden Approxn. |
| HYSCORE | Hyperfine Sublevel Correlation Spectroscopy |
| EFV GTO | Electric-field-variant Gaussian-type Orbital |
| ASLE | American Society Of Lubrication Engineers (USA |
| MBRS | Molecular Beam Relaxation Spectrometry |
| EPCE | Effective Pair Correlation Energy Method |
| BMD | Bone Mineral Density |
| BSO | Buthionine Sulfoximine |