| Acronym | Meaning |
| HID | Helium Ionization Detector |
| GMAD | Geometric Mean Aerodynamic Diameter |
| EBO | Equivalent Bond Orbital |
| QRHF-CC | Quasirestricted Hartree-Fock Coupled Cluster |
| GSNO | Ground-state Natural Orbital |
| SEPP | State Environmental Protection Plan |
| PTGF | Perturbative-type Green Function |
| NEIC | National Enforcement Investigations Center |
| DBMS | Data Base Management System |
| TFB | Thin Film Balance |