| Acronym | Meaning |
| OSRSCF | Open-shell Restricted SCF |
| ASM | American Society For Metals |
| TARC | Tiered Area Response Capability |
| HSDI | High-speed Direct Injection (of Diesel Engines) |
| MPC | Maximum Permissible Concentration |
| POAM | Polar Ozone And Aerosol Measurements |
| RAPIDS | Regional Air Pollutant Inventory Development System |
| LFC | Load Frequency Control (battery Systems) |
| ADARD | Acid Deposition And Atmospheric Research Division |
| CHWMP | County Hazardous Waste Management Plan |