| Abbreviation | Definition |
|---|---|
| ECTA | East Coast Trail Association (Newfoundland and Labrador, Canada) |
| ECTA | Elora Cataract Trailway Association (Ontario, Canada) |
| ECTRIMS | European Committee for Treatment and Research in Multiple Sclerosis |
| EDA | Every Day Angels |
| EDAN | Ecumenical Disability Advocates Network |
| EDDA | Enfield and District Dyslexia Association |
| EDF | EcoLogic Development Fund |
| EDG | Educational Delegation to Guatemala |
| EDGE | Equity, Diversity, and Gender Equality |
| EDH | Educational Delegation to Honduras |
| EDI | Eating Disorders International |
| EDII | Enterprise Development International, Inc. |
| EDII | Enterprise Development International, Incorporated |
| EDLAW | Education Law & Policy Consortium |
| EDN | EarthDay Network |
| EDN | Eating Disorders Network |
| EDN | Economic Development Network |
| EDTA | European Dialysis Transplant Association |
| EEFC | East European Folklife Center |
| EEI | EarthWatch Expeditions, Inc. |