| Acronym | Meaning |
| PNS | Peripheral Nervous System |
| PWM | Pulse Width Modulation |
| BEES | Ballistic Electron Emission Spectroscopy |
| MES | Molecular Emission Spectroscopy |
| PEMFC | Proton Exchange Membrane Fuel Cell |
| SDS | Sodium Dodecyl Sulfate |
| UHF-CO | Unrestricted Hartree-Fock Crystal Orbital |
| EIS | Electron Impact Spectroscopy |
| PCI-80 | Parametrized Configuration Interaction (with Parameter) 80 |
| ASM | Advanced Scavenging Model (for Air Pollution) |