| Acronym | Meaning |
| IS | Ionization Spectroscopy |
| SDG | Signed Directed Graph (model) |
| OSTI | Office Of Scientific And Technical Information |
| CFGE | Crossed-field Gel Electrophoresis |
| ACCR | Activated Carbon Catalytic Reduction |
| CGC | Capillary Gas Chromatography |
| USACE | US Army Corp Of Engineers |
| CDOM | Colored Dissolved Organic Matter |
| MCEB | Multiconfiguration Energy Bound |
| GA | Glauber Approximation (in Electron-atom Scattering) |