| Abbreviation | Definition |
|---|---|
| EC | Election Commission |
| ECA | Bureau of Educational and Cultural Affairs |
| ECA | Export Credit Agency |
| ECAB | Employees' Compensation Appeals Board |
| eCAC | Executive Carcinogenesis Assessment Committee |
| ECAT | Electronic Compliance Assistance Tool |
| ECCN | Export Commodity Classification Number |
| ECE | Entities Claiming Exceptions |
| ECEE | Export Council for Energy Efficiency |
| ECGA | Export Credit Guarantee Agency |
| ECI | Effectively Connected Income |
| ECLD | Environmental and Consumer Law Division |
| ECLD | Expensive Car Leasing Dis-allowance |
| eCMS | Electronic Contract Management System |
| ECO | Emergency Custody Order |
| ECON | Economics |
| ECOSOC | Economic and Social Council |
| ECP | Environmental Careers Program |
| ECP | Extreme Corporal Punishment |
| ECPPS | Early Childhood Program Participation Survey |