•
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==