| Acronym | Meaning |
| VTZ | Valence Triple Zeta (basis Set) |
| HRGS | High-resolution Gamma-ray Spectrometry |
| AGA | American Gas Association |
| EAA | Essential Amino Acids |
| ACE | Angiotensin-converting Enzyme |
| BOLD | Blood Oxygenation Level-dependent |
| TACE | Tumor Necrosis Factor Alpha-converting Enzyme |
| PSA | Potentiometric Stripping Analysis |
| NTB | Nonorthogonal Tight-binding |
| AGWSE | Association Of Ground Water Scientists And Engineers |