| Acronym | Meaning |
| CASAC | Clean Air Scientific Advisory Committee (US EPA) |
| GTO | Gaussian-type Orbital |
| TDDB | Time Dependent Dielectric Breakdown |
| CIOS | Classical Infinite Order Sudden (in Atom-mol. Reaction Calcns.) |
| ICBO | International Conference Of Building Officials |
| DAVES | Desorption And Vapor Extraction System |
| OIDA | Optoelectronics Industry Development Association |
| USANS | Ultra-small-angle Neutron Scattering |
| FEGO | Floating Ellipsoidal Gaussian Orbital |
| MERT | Modified Effective-range Theory (for Electron-mol. Scattering) |