| Acronym | Meaning |
| EQA | External Quality Assessment |
| EPACSAR | EPA Chemical Activities Status Report |
| ASME | American Society Of Mechanical Engineers |
| SWICH | Solid Waste Information Clearinghouse And Hotline |
| PDR | Photon-dominated Region |
| TBSI | N-tert-butyl-2-benzothiazyl Sulfenimide |
| CISS | Constant-initial-state Spectroscopy |
| WQS | Water Quality Standard |
| ERDAS | Earth Resource Data Analysis System |
| SXRF | Synchrotron X-ray Fluorescence |