| COOA | Center of Excellence for Coastal Ocean Observation and Analysis (University of New Hampshire; Durham, NH) 
| Others |
| COOA | Central Ohio Optometric Association
| Others |
| COOA | Chico Oroville Outdoor Adventurers
| Others |
| COOA | Chico Oroville Outdoor Adventures
| Others |
| COOA | China Optometric Optical Association
| Others |
| COOA | Coastal Ocean Observing and Analysis (University of New Hampshire)
| Others |
| COOA | Constituent Organization Outreach and Advocacy
| Others |