ETI

ETI is an initialism or acronym and may refer to:

• Electronics Temperature Instruments, a company
• Electronics Today International (magazine), a magazine
• United Kingdom Energy Technologies Institute
• Ethical Trading Initiative
• Evolutionary Technologies International
• Effector triggered immunity, a part of the plant immune system
• Extraterrestrial intelligence
• Electric Transit, Inc., a defunct trolleybus manufacturer in the United States
• Elemental Technologies, Inc., a video software company in Portland, Oregon
• Ecobank Transnational Inc., the holding company of the Pan-African bank Ecobank
• Equipment and Tool Institute, a US-based non-profit automotive trade association
• E.T.I.(Extra Terrestrial Intelligence), a song by Blue Oyster Cult, from their 1976 album Agents of Fortune