| Acronym | Meaning |
| AO | Abnormal Occurrence |
| NAIC | National Astronomy And Ionosphere Center |
| SERON | Southeastern Regional Oxidant Network Program |
| GLONET | Global Ozone Observing System |
| ITC | Information Technology Council |
| TSAO | Tropical Semiannual Oscillation |
| EXCEL | Experimental Chloride Extraction Line |
| ROPCOM | Remote OPCM |
| PRC | People's Republic Of China |
| AWQC | Ambient Water Quality Criteria |