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IEI

IEI may mean:

  • Idiopathic environmental intolerance, also known as multiple chemical sensitivity
  • Individual Employment Income
  • Institution of Engineers (India)
  • Institut d'échanges interculturels
  • Institution of Engineers of Ireland
  • Intensive English Institute, at the University of Illinois in Urbana–Champaign
  • Intuitive Ethical Introvert, in socionics theory
  • Iran Engineering Inspection
  • IEI Integration Corporation