| Acronym | Meaning |
| TAD | Thermophilic Aerobic Digestion (of Sewage Sludge) |
| ARSCF | Approximate Relativistic SCF |
| RT | Reverse Transcriptase |
| PCT | Photoinduced Charge Transfer |
| LDAR | Leak Detection And Repair |
| CMS | Comprehensive Modeling System |
| CSERGE | Center For Social And Economic Research Into The Global Environment |
| PET | Potential Evapotranspiration |
| BEST | Basic Extractive Sludge Treatment |
| IAP | Intermittent Aeration Process (for Waste Treatment) |