| Acronym | Meaning |
| CFM | Charge-fluctuation Model |
| PTC | Positive Temperature Coefficient [elec. Conducting Material] |
| PDG | Patent Documentation Group |
| BTDC | Before Top Dead Center |
| EICP | Enclosed Inductively Coupled Plasma |
| REMPI | Resonance-Enhanced Multiphoton Ionization (for Mass Spectrometry) |
| CMV | Cucumber Mosaic Virus |
| EUV | Extreme Ultraviolet |
| IJC | International Joint Commission |
| RPD | Retarding Potential Difference |