| Acronym | Meaning |
| APL | Alternative Pollutant Limits |
| RTD | Residence Time Distribution |
| WWEMA | Waste And Wastewater Equipment Manufacturers Association |
| PRMO | Partially Restricted Molecular Orbital |
| EASTT | Environmental Advisory Service For Technology Transfer |
| SPDT | Single Point Diamond Turning |
| PIXET | Proton Induced X-ray Emission Tomography |
| EOSP | Earth Observing Scanning Polarimeter |
| HI | Hinkley Index |
| LSA | Local Space Approximation |