| Acronym | Meaning |
| IAQ | Indoor Air Quality |
| DEM | Digital Elevation Model |
| DDE | Dichlorodiphenyldichloroethylene |
| OEMTB | One-electron Mol. Tight-binding (for Electronic Structure) |
| TLEV | Transition Low Emission Vehicle |
| PGO | Phantom Group Orbital |
| TLA | Thin Layer Activation |
| RCR | Respiratory Control Ratio |
| WDD | Weighted Density Distribution |
| SIRS | Systemic Inflammatory Response Syndrome |