| Acronym | Meaning |
| IRS | Internal Recognition Subsequence |
| PFGSE | Pulsed Field-gradient Spin-echo |
| BD | Brueckner (orbitals With) Double (substitution) (in Electron Correlation) |
| CHARM | Complex Hazardous Air Release Model |
| NGF | Nerve Growth Factor |
| AEP | Auditory Evoked Potential |
| IMAGE | International Monitor For Auroral Geomagnetic Effects |
| GENESIS | Global Environmental And Ecological Simulation Of Interactive Systems |
| FAS | Flame Absorption Spectroscopy |
| BEES | Ballistic Electron Emission Spectroscopy |