| Acronym | Meaning |
| BRIM | Bladder Reaction Injection Molding |
| PEOE | Partial Equalization Of Orbital Electronegativity (model) |
| LTAVD | Low Temperature Arc Vapor Deposition |
| HWI | Hazardous Waste Incineration |
| SPIRIT | Single Photon Ionization Resonance Ionization To Threshold |
| ASE | Augmented Secular Equation |
| DIIS | Direct Inversion In The Iterative Space |
| SPELEEM | Spectroscopic PhotoEmission And Low Energy Electron Microscope |
| CNDO/2-U | Universal CNDO/2 (extended To Full Periodic Table) |
| SCBC | Self-consistent Basis And Configuration |