| Acronym | Meaning |
| BWCCD | Brillouin-Wigner Coupled-cluster (with) Double (excitation) |
| WWT | Wastewater Treatment |
| FIAT | Field Information Agency Technical |
| TVS | Total Volatile Solids |
| SAMA | Scientific Apparatus Makers Association |
| GEO | Gene Expression Omnibus |
| ZTS | Z Transition State [z = Nuclear Charge] (method For Calcg. Isoelectronic Energy Differences And Electrostatic Potentials For A |
| SWICH | Solid Waste Information Clearinghouse And Hotline |
| FECO | Fringes Of Equal Chromatic Order |
| FMDF | Fixed Mirror Distributed Focus (solar Concentrator) |