| Acronym | Meaning |
| TOXNET | Toxicology Network Of The National Library Of Medicine |
| DTA | Direct Toxicity Assessment (of Wastewater Discharges) |
| CFP | Coefficient Of Fractional Parentage (method In Quantum Calcns.) |
| BTCC | Biological Threat Characterization Centerpar |
| WEDM | Wire Electric Discharge Machining |
| NPA | Natural Population Analysis |
| ISS | Intermediate Solid Solution |
| QC-SCF | Quadratically Convergent SCF (for Closed-shell Systems) |
| SHM | Stockholm Humic Model |
| LAD | Leukocyte Adhesion Deficiency |