| Acronym | Meaning |
| NRC | National Response Center |
| GX | Generalized Exchange |
| AEES | Auger Electron Emission Spectroscopy |
| PFU | Plaque-forming Units |
| DMAD | Dimethyl Acetylenedicarboxylate |
| FEL | Free Electron Laser |
| QCISD(T) | Quadratic CI (with) Single (and) Double (excitations) (and) [triple Excitations Added Perturbatively] |
| UMEA | Ultramicroelectrode Array |
| NACCA | North American Council Of Chemical Associations |
| PTA | Packed Tower Aeration |