| Acronym | Meaning |
| RAPIDS | Regional Air Pollutant Inventory Development System |
| IPA | Independent-pair Approximation |
| DTP | Developmental Therapeutics Program |
| DSS | Decision Support System |
| SPA | Separated Pair Approxn. (wave Function) |
| POAM | Polar Ozone And Aerosol Measurements |
| PCM | Phase-change Medium |
| CDPT | Constant Denominator Perturbation Theory |
| ANS | Autonomic Nervous System |
| HMIMS | Hazardous Materials Incident Management System |