| Acronym | Meaning |
| HFCVD | Hot Filament Chemical Vapor Deposition |
| CEM | Continuous Emissions Monitoring |
| HERL | Health Effects Research Laboratory |
| IDEA | Integrated Data For Enforcement Analysis |
| PCT | Patent Cooperation Treaty |
| LNO | Localized Natural Orbital |
| ICAO | International Civil Aviation Organization |
| SCEP | Self-consistent Electron-pair Theory |
| OIP | Optimized Inner Projection (method For Mol. Property Calcns.) |
| MBPT(2)-GF | Second-order Many-body Perturbation Theory-green Function |