| Acronym | Meaning |
| PTS | Pressurized Thermal Shock |
| QSI | Quantum Statistical Interference |
| IISCI | Initial Ionic State Comfiguration Interaction |
| DTGF | Double-time Green Function |
| RAFA | Rank Annihilation Factor Analysis |
| HAPEMS | Hazardous Air Pollutant Enforcement Management System |
| CARIBIC | Civil Aircraft For Remote Sensing And In Situ Measurements In Troposphere And Lower Stratosphere Based On The Instrumentation |
| NEROS | Northeast Regional Oxidant Study |
| DOJ | U.S. Department Of Justice |
| TTSS | Tropospheric Trace Species Sounder |