| Acronym | Meaning |
| AECMA | European Association Of Aerospace Manufacturers |
| USDI | US Department Of Interior |
| HWI | Hazardous Waste Incineration |
| MBSCI | Minimum Basis Set Configuration Interaction |
| HAPEM | Hazardous Air Pollutant Exposure Model |
| CSCT | US EPA Consortium For Site Characterization Technology |
| ROMP | Restricted Open-shell Moeller-Plesse |
| NADB | National Air Data Branch (US EPA) |
| ESI | Ease-of-separation Index |
| TSM | Total Suspended Material |