| Acronym | Meaning |
| BSA | Breathing-sphere Approxn. (for Inelastic Mol. Collisions) |
| ACAR | Angular Correlation Of Annihilation Radiation |
| DDM | Denuder Difference Method |
| ISD | Inclined Substrate Deposition |
| WQBEL | Water Quality-based Effluent Limits |
| AIJ | Activities Implemented Jointly [related To Greenhouse Gas Control] |
| HAZW | Hazardous Waste Collection Database (accessible Through OLS) |
| TPQ | Threshold Planning Quantity |
| FACE | Free Air Controlled Enrichment Program |
| CVC | Chemical Vapor Composites |