| Acronym | Meaning |
| WWW | World Wide Web |
| SAIC | Science Applications International Corporation |
| RFG | Reformulated Gasoline |
| EXPOLIS | Air Pollution Exposure Distribution Within Adult Urban Populations In Europe |
| PKA | Protein Kinase A |
| FEL | Free Electron Laser |
| VSD | Virtually Safe Dose |
| DSVI | Diluted Sludge Volume Index |
| ETEC | Environmental Technology & Education Center |
| NRHF | Numerical Restricted Hartree-Fock |