| Acronym | Meaning |
| HC | Hazardous Constituent |
| PGDN | Propylene Glycol Dinitrate |
| SLS | Strained Layer Superlattice |
| GRPA | Generalized Random-phase Approximation |
| OMPW | Orthogonalized Modulated Plane Wave (wave Function) |
| RHFS | Restricted Hartree-Fock-Slater |
| AWT | Advanced Wastewater Treatment |
| LCS | Laboratory Control Samples |
| MPO | Modified Polarized Orbital |
| EDRS | Enforcement Document Retrieval System |