| Acronym | Meaning |
| BAC-MP4 | Bond-additivity-corrected Moeller-Plesset 4th-order Perturbation |
| HELP | Hydrologic Evaluation Of Landfill Performance Model |
| PPA | Pollution Prevention Act (of 1990) |
| QISM | Quantum Inverse Scattering Method |
| BIAS | Bismuth-active Substance (in Surfactant Concn. Detn. In Environmental Tests) |
| DRAWS | Dipolar Recoupling With A Windowless Sequence |
| BMCD | Biological Macromolecule Crystallization Database |
| IRIS | Integrated Risk Information System |
| STRP | Short Tandem Repeat Polymorphism |
| AMTIR | Amorphous Material Transmitting Infrared Radiation |