| Acronym | Meaning |
| CTDM | Complex Terrain Dispersion Model (air Quality) |
| POG | Post-orogenic Granitoids |
| SIR | Selected Ion Recording |
| HDTMAB | Hexadexyltrimethylammonium Bromide |
| CTL | Cytotoxic T Lymphocyte |
| DWRD | Drinking Water Research Division (EPA) |
| ESIG | European Solvents Industry Group |
| DCN | Document Change Notice |
| SOA | Secondary Organic Aerosols |
| MON | Motor (method) Octane No. |