| Acronym | Meaning |
| CFD | Computational Fluid Dynamics |
| ALR | Airlift-loop Reactor |
| ORC | Origin Recognition Complex |
| AWMA | Air And Waste Management Association |
| CMC | Conditional Moment Closure [model] |
| TDFGH | Time-dependent Fourier Grid Hamiltonian (method) |
| UASBR | Upflow Anaerobic Sludge Blanket Reactor |
| GRCDA | Government Refuse Collection And Disposal Association |
| TRO | Tubular Reverse Osmosis |
| EPRI | Electric Power Research Institute |