| Acronym | Meaning |
| IEPA | Independent Electron Pair Approximation |
| BSAF | Biota-to-sediment Accumulation Factor |
| TPA | Terephthalic Acid |
| RUSTIC | Risk Of Unsaturated/saturated Transport And Transformation Of Chemical Concentrations |
| HEI | Highly Exposed Individual |
| OLPA | Orbital Local Plasma Approxn. (in Stopping Power Calcn. For Ions By Films) |
| CIN | Chemical Industry Notes |
| MIC | Microbially Induced Corrosion |
| UAM-IV | Urban Airshed Model Version IV |
| RFA | Regulatory Flexibility Analysis |