| Acronym | Meaning |
| OBK3 | Third-order Oppenheimer-Brinkman-Kramers |
| RPA | Random Phase Approximation |
| HFA | Humic And Fulvic Acids |
| FFT | Fast Fourier Transform |
| EGFR | Epidermal Growth Factor Receptor |
| ERIS | Electrochemically Regenerated Ion Suppressors |
| USPHS | United States Public Health Service |
| HSPF | Hydrological Simulation Program-Fortran |
| FROG | Frequency-resolved Optical Grating |
| JPEG | Joint Photographic Expert Group |