| Acronym | Meaning |
| BWPT | Brillouin-Wigner Perturbation Theory |
| AREP | Averaged Relativistic Effective Potential |
| RATL | Risk Analysis Testing Laboratory |
| CAT | Clear Air Turbulence |
| DWRF | Drinking Water Research Foundation |
| EIS | Environmental Impact Statement |
| VCB-CPA | Virtual Crystal Bandwidth-coherent Potential Approxn. (for Electronic-structure Calcns. On Alloys) |
| ALCA | American Leather Chemists' Association |
| TDCC | Time-dependent Close-coupling |
| BLMO | Boys Localized Molecular Orbital |