| Acronym | Meaning |
 | DCAR | Data Collection Analysis Request |
| FTOS | FGGE Tropical Observing System |
| AQCR | Air Quality Control Region |
| 4DDD | Four-Dimensional Data Assimilation |
| GDAS | Global Data Assimilation System |
| GEIA | Global Emissions Inventory Activity |
| IWRS | Improved Weather Reconnaissance System |
| ACGIH | American Conference Of Governmental Industrial Hygienists |
| MATCH | Model For Atmospheric Chemistry And Transport |
| ARGOS | Data Collection And Location System |
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