| Acronym | Meaning |
| LCD | Liquid Crystal Diode |
| MARS | Membrane Anaerobic Reactor System |
| DWIOS | Distorted Wave Infinite Order Sudden Approximation |
| UVAS | UV Absorption Spectroscopy |
| RIA | Regulatory Impact Analysis |
| AFA | Abstract Factor Anal. (statistics) |
| FR | Federal Register |
| NLPLS | Nonlinear Partial Least Squares |
| TSC | Thermal Stimulated Current |
| HMIG | Hazardous Materials Identification Guide |