| Acronym | Meaning |
 | NPDES | National Pollutant Discharge Elimination System |
| OTC | Organic Toxic Compound |
| PSES | Pretreatment Standards For Existing Sources |
| IATA | International Air Transport Association (Geneva |
| ERP | Enterprise Resource Planning |
| RAMP | Receptor Activity Modifying Protein |
| PRZM | Pesticide Root Zone Model |
| IAHR | International Association For Hydraulic Research |
| OSW | Office Of Solid Waste (US EPA) |
| CNDO/SW | Complete Neglect Of Differential Overlap / Sichel-Whitehead |
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