| Acronym | Meaning |
| HTSS | Hierarchical Tree Substructure Search |
| FSQ | Full-spectrum Quantitation |
| GFCR | Gas Filter Correlation Radiometry |
| TEC | Thermal Expansion Coefficient |
| B1B | (coulomb) Boundary-corrected First Born (for Scattering) |
| NFRAP | No Further Remedial Action Planned |
| ASR | Automobile Shredder Residue |
| APF | Advanced Particle Filter |
| PAS | Photoacoustic Spectroscopy |
| RPCR | Restricted Principal Component Regression |