| Acronym | Meaning |
| BUN | Blood Urea Nitrogen |
| LBF | Local Basis Function Method (for Solid State Band Structure) |
| TTHM | Total Trihalomethane |
| HENA | High-energy Neutral Atom |
| WALTZ | Wonderful Alternating Phase Technique For Zero Residual Splittings |
| IPDI | Isophorone Diisocyanate |
| NPA | Natural Population Analysis (for Electron Configuration Of Mols.) |
| SMAI | Solvated Metal Atom Impregnation |
| RSS | Residual Sum Of Squares |
| AMIA | American Medical Informatics Association |