Organizations
- Aer Lingus (IATA code: EI), the flag airline of Ireland
- The Earth Institute, a collection of research centers at Columbia University
- Education International, a global union federation of teachers' trade unions
- The Electronic Intifada, a not-for-profit, independent online publication which covers the Israeli-Palestinian conflict from a Palestinian perspective
- Energy Institute, the main professional organization for the energy industry within the UK
- Enterprise Ireland, is the Irish government organisation responsible for the development and growth of Irish enterprises in world markets.
- Expeditors International, the global logistics and freight forwarding company based out of Seattle, Washington
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