| Acronym | Meaning |
| ROSS | River Oil Spill Simulation |
| PAH | Polycyclic Aromatic Hydrocarbon |
| IPCS | International Program On Chemical Safety |
| PRMO | Partially Restricted Molecular Orbital |
| PODS | Periodic Orbit Dividing Surfaces (in Potential Surface Calcn.) |
| DWTT | Drop-weight Tear Test |
| CCSD-ED | Coupled-cluster Method With Single And Double Excitations-energy Derivative |
| IWS | Ionizing Wet Scrubber |
| NCLAP | National Crop Loss Assessment Program |
| AOM | Angular Overlap Model |