| Acronym | Meaning |
| PBII | Plasma-based Ion Implantation |
| CBS-QCI | Complete Basis Set-quadratic Configuration Interaction |
| SCFB | Standard Cubic Feet Per Barrel |
| SCRAM | EPA Support Center For Regulatory Air Models |
| BDOC | Biodegradable Dissolved Organic Carbon |
| NWEA | National Wood Energy Association |
| TRES | Time-resolved Emission Spectroscopy |
| TO | Topological Orbital (in Graph Theory Of Molecules) |
| ACJ | Artificially Constructed Junction (in Solar Cell Fabrication) |
| NDBEPR | Nitrification-denitrification Biological Excess Phosphorus Removal |