| Acronym | Meaning |
| CCI | Crevice Corrosion Index |
| IRF | Instrument Response Function |
| CAEC | Center For Analysis Of Environmental Change |
| JJT | Josephson Junction Transistor |
| ILS | Intracavity Laser Spectroscopy |
| PZEV | Partial Zero Emission Vehicle |
| HID | Helium Ionization Detector |
| MR-MP | Multireference Moeller-Plesset (perturbation Theory) |
| EPIC | Electronics Properties Information Center |
| RMTO | Relativistic Muffin-tin Orbital |