| Acronym | Meaning |
| SCGF | Self-consistent Group Function |
| PSM | Process Safety Management |
| LNO | Localized Natural Orbital |
| COMAH | Control Of Major Accident Hazards |
| BRC | Below Regulatory Concern |
| CFM | Charge Force Microscope |
| NOMS | National Organics Monitoring Survey (US EPA 1976-1977) |
| STS | Scanning Tunnelling Spectroscopy |
| SSED | Solar System Exploration Division (NASA) |
| NIWR | National Institute For Water Research (South Africa) |