| Acronym | Meaning |
| FWM | Four-wave Mixing |
| EAS | Extensive Air Shower |
| MARS | Membrane Anaerobic Reactor System |
| CPFD | Coupled-pair Functional With Double Excitation |
| BBO | Bonding Bond Orbital |
| MAS | Molecular Absorption Spectroscopy |
| DCCC | Droplet Counter Current Chromatography |
| ECAP | Energy-compensated Atom Probe |
| RSE | Relativistic Symmetric Eikonal |
| RRR | Residual Resistivity Ratio |