CEI
CEI may refer to:
- Central European Initiative
- Chicago and Eastern Illinois Railroad
- Clinical and Experimental Immunology, an academic journal published by Wiley-Blackwell on behalf of the British Society for Immunology
- Common Electrical Interface, a hardware interoperability agreement defined by the Optical Internetworking Forum
- Competitive Enterprise Institute, a libertarian think-tank
- Coupled ENSO Index, an alternate index to Multivariate ENSO index
- Cycle Engineers' Institute, a screw thread pattern (see British Standard Whitworth, which includes information on topic)
- IATA code for Mae Fah Luang International Airport, Chiang Rai, Thailand
- Italian Episcopal Conference, in Italian Conferenza Episcopale Italiana
- Cupertino Electric Incorporated, an electrical engineering company in California
- Creative Engineering, Inc.
See also
- Sir Kay (Welsh: Cei), of Arthurian legend
This disambiguation page lists articles associated with the title CEI.
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