| Acronym | Meaning |
| LCOPW | Linear Combination Of Orthogonalized Plane Waves |
| PIO | Paired Interaction Orbital |
| SED | Surface-conduction Electron-emitter Display |
| APSG | Antisymmetrized Product Of Spin Geminals Method |
| EBOM | Effective Bond-orbital Method |
| ETS | Electron Transport System |
| CPT | Coulomb Wave-plane Wave (description With) Truncated (treatment) |
| CEPPO | Chemical Emergency Preparedness And Prevention Office |
| UOT | Universal Oxidn. Test |
| CJD | Creutzfeldt-Jakob Disease |