| ECAC | Early Childhood Adivisory Council 
| Others |
| ECAC | Early Childhood Advisory Council
| Others |
| ECAC | Early College Allegan County
| Others |
| ECAC | Earth Course Assistance Center
| Others |
| ECAC | East Coast Athletic Conference
| Others |
| ECAC | Eastern College Athletic Competition
| Others |
| ECAC | Eastern College Athletic Conference
| Others |
| ECAC | Eisselectronic Communication Across The Curriculum
| Others |
| ECAC | Election Complaints And Appeals Commission
| Others |
| eCAC | Electric Cabin Air Compressor
| Others |
| ECAC | Electromagnetic Compatibility Analysis Center
| Others |
| ECAC | Electromagnetic Continuity Analysis Center
| Others |
| ECAC | Emerald Coast Autism Center
| Others |
| ECAC | Engineering Career Assistance Center
| Others |
| ECAC | Enhanced Call Admission Control
| Others |
| ECAC | ESOP Communication Advisory Committee
| Others |
| ECAC | Ethiopian Community Association of Chicago
| Others |
| ECAC | European Center for Aerosol Calibration
| Others |
| ECAC | European Civil Aviation Conference
| Others |
| ECAC | Exceptional Children's Assistance Center
| Others |
| eCAC | Executive Carcinogenesis Assessment Committee
| Others |
| ECAC | External Course Appraisal Committees
| Others |