| Acronym | Meaning |
| BI | Bond Increment (method In Calcns. On Large Molecules) |
| SUTRA | Saturated Unsaturated Transport Model |
| RS-HFPT | Rayleigh-Schroedinger Hartree-Fock Perturbation Theory |
| GIWA | Global International Waters Assessment |
| QMAR | Quantitative Migration-activity Relationship |
| RAP | Remedial Action Project Or Plan |
| DAS | Dendrite Arm Spacing |
| SCM | Shell-correction Method (in Calcns. For Metal Clusters) |
| RAAS | Renin-angiotensin-aldosterone System |
| HSDB | Hazardous Substances Data Bank (NLM) |