| Acronym | Meaning |
| IWSA | International Water Supply Association |
| ABWAG | Abwasserabgabengestres (Germany Wastewater Discharge Law Regulates Cost Per Volume) |
| AAU | Amendment To Allege Use |
| CCID | Confidential Chemicals Identification System |
| RMCSTEP | Repartitioned Multiconfigurational Spin-tensor Electron Propagator |
| CBD | Cellulose-binding Domain |
| EFC | European Federation Of Corrosion |
| MGD | Million Gallons Per Day |
| SROS | Spin-restricted Open Shell |
| BADT | Best Available Demonstrated Technology |