ETI
- Agents of Fortune
- Ecobank Transnational Inc.
- Effector-triggered immunity
- Electric Transit, Inc.
- Electronic Temperature Instruments
- Electronics Today International
- Elemental Technologies, Inc.
- Energy Technologies Institute
- Ente Tabacchi Italiani
- Equipment and Tool Institute
- Ethical Trading Initiative
- Ethyl iodide
- Eti (company)
- Eti (film)
- Eti Livni
- Eti Maden
- Eti River
- Eti Saaga
- Eti Tavares
- Extraterrestrial intelligence