| Acronym | Meaning |
| CCWP | Close-coupling Wave-packet (for Mol. Scattering) |
| HWRA | Hazardous Waste Reduction Act |
| TFDW | Thomas-Fermi-Dirac-Von Weizsaecker (method For Electronic Structure Calcns. On Mols.) |
| RASSI | Restricted Active Space State Interaction |
| MRL | Maximum Residue Limit |
| USCE | US Army Corps Of Engineers |
| NHE | Na+-H+ Exchanger |
| ABCM | Assembly (of) Boundary-controlled Monolayers (method For Electronic-structure Calcns.) |
| BABB | Back Arc Basin Basalt |
| ECISDT | Size-extensive CI With Single And Double And Triple Excitations |