| Acronym | Meaning |
| MRCI | Multireference Configuration Interaction |
| APWR | Advanced Pressurized Water Reactor |
| SWRRB | Simulation For Water Resources In Rural Basins |
| NBOD | Nitrogenous Biochemical Oxygen Demand |
| HRV | Human Rotavirus |
| MICS | Magnetospheric Ion Compn. Spectrometer |
| WLF | Williams-Ferry-Landel [viscosity Math. Relation/parameter] |
| AGU | American Geophysical Union |
| RAMC | Risk Assessment And Management Commission |
| R-GVB | Resonating-generalized Valence Bond (wave Function) |