| Acronym | Meaning |
| PI | Pollution Index |
| SPELL | Spectral Eulerian Lagrangian Model |
| RA | Remedial Action |
| RDA | Recommended Daily Allowance |
| APM | Acoustic Plate Mode |
| PRDDO | Partial Retention Of Diatomic Differential Overlap |
| HAZWOPER | Hazardous Waste Operations And Emergency Response Regulations |
| OMTP | Overlap-multipole-expansion Procedure |
| IMPPT | Intermolecular Moeller-Plesset Perturbation Theory |
| GMCC | Geophysical Monitoring For Climate Change |