| Acronym | Meaning |
| EGR | Exhaust Gas Recirculation |
| FITC | Fluorescein Isothiocyanate |
| SIP | State Implementation Plan |
| ADPIC | Atmospheric Dispersion Particle-in-Cell |
| FAAO | Free-atom Atomic Orbital |
| BPDA | Born Point Dipole Approximation |
| AOSTRA | Alberta Oil Sands Technology And Research Authority |
| SSTL | Singwi Sjolander Tosi Land (interatomic Potential) |
| ADAS | Acid Deposition Assessment Staff |
| RRM | Rayleigh-Ritz Method (for Quantum Calculations) |