| Acronym | Meaning |
| PBO | Polarized Born-Oppenheimer |
| MP2-R12 | MP2 Theory With Terms Linear In Interelectronic Distance (r12) |
| PVOH | Polyvinyl Alcohol |
| SRA | Society For Risk Analysis |
| AQO | Average Quadrupole Orientation |
| EXAMS | Exposure Analysis Modeling System |
| EHCO | Extended Hueckel Crystal Orbital |
| HCA | Hazardous Communication Act |
| VEEH | Variable Electronegativity Extended Hueckel Method |
| RBR | Reductive Burning Recovery |