CEI may refer to:

Organizations

  • Central European Initiative, a forum of regional cooperation in Central and Eastern Europe
  • Clean Energy Institute, a renewable energy research institute at the University of Washington, in Seattle, Washington, US
  • Cleveland Electric Illuminating Company, a defunct American utility company
  • College of Eastern Idaho, a public community college in Idaho Falls, Idaho, US
  • Commission électorale indépendante (Democratic Republic of the Congo) or Independent Electoral Commission, former name of the Independent National Electoral Commission
  • or Independent Electoral Commission, body that oversees elections in Ivory Coast
  • Competitive Enterprise Institute, an American libertarian think tank
  • or Episcopal Conference of Italy, conference of Roman Catholic bishops
  • Council of Engineering Institutions, later the Engineering Council, a British regulatory authority
  • Creative Engineering, Inc., American company
  • Cycle Engineers' Institute, a screw thread pattern, see British Standard Whitworth

Other uses

  • Chicago and Eastern Illinois Railroad
  • Child exploitation imagery, a category of illegal or harmful online content
  • Common Electrical I/O, interoperability agreements
  • Comparably efficient interconnection
  • Corporate Equality Index of US businesses regarding LGBT people
  • IATA code for Chiang Rai International Airport, Thailand

See also

  • Cei (surname)