| Acronym | Meaning |
| OEO | Overlap-enhanced Orbital |
| EPI | Electronic Patent Index |
| BEBO | Bond Energy Bond Order Method |
| ACS | Acute Coronary Syndrome |
| CFFE | Continuous Free Flow Electrophoresis |
| LTDU | Land Treatment Demonstration Unit |
| STN | Super Twisted Nematic |
| AOS | Alpha Olefin Sulfonate (surfactant) |
| ERE | Estrogen-responsive Element |
| ATMOS | Atmospheric Trace Molecule Spectroscopy |