| Acronym | Meaning |
| NIWG | National Interagency Work Group |
| EPIC | Erosion-productivity Impact Calculator |
| CIDR | Controlled-internal Drug Release |
| USGCRP | U.S. Global Change Research Program |
| MMA | Methyl Methacrylate |
| PMT | Photomultiplier Tube |
| NTA | Nitrilotriacetic Acid |
| TFA | Thomas-Fermi-Amaldi (equation) |
| CECE | Combined Electrolysis And Chemical Exchange |
| EMIT | Enzyme-multiplied Immunoassay Technique |