| Acronym | Meaning |
| CEPM | Coupled Electron Pair Method |
| NAPIS | National Agricultural Pest Information System |
| ERRIS | Emergency And Remedial Response Information System |
| PPI | Prepulse Inhibition |
| HMM | Hazardous Materials Management |
| OPC | Optical Particle Counter |
| PNEC | Predicted No-effect Concentration |
| AFP | Antifreeze Protein |
| OIC | Optical Interface Coupler |
| HHOB | High-energy Higher-order Born (approxn. For Scattering Calcns.) |