| Acronym | Definition |
|---|
| ECCO➣European Cancer Organisation (Belgium) |
| ECCO➣Earth Coincidence Control Office (John C. Lilly) |
| ECCO➣Estimating the Circulation and Climate of the Ocean |
| ECCO➣European Conference on Clinical Oncology |
| ECCO➣Evolution, Complexity and Cognition Group (Belgium) |
| ECCO➣European Crohn's and Colitis Organization (Vienna, Austria) |
| ECCO➣European Confederation of Conservator-Restorers' Organisation |
| ECCO➣Elections Committee of the County of Orange |
| ECCO➣East Central Community Organization |
| ECCO➣Education Center for Community Organizing (New York, NY) |
| ECCO➣Asociación de Ecología Y Conservación (Spanish: Association for Ecology and Conservation; Peru) |
| ECCO➣Employee Customer Concerns Office |
| ECCO➣Evolutionary Command/Control Operations |
| ECCO➣Encinitas Chamber of Commerce Outreach (California) |
| ECCO➣European Cannabis Consumers Organisation (founded in Amsterdam, 1994) |
| ECCO➣Electronics Controls Company |
| ECCO➣Evaluating Capital Creation Options (economics) |