Organizations
- Campaign for an English Parliament, a pressure group which seeks the establishment of a devolved English parliament
- Congregation for the Evangelization of Peoples, a dicastery of the Roman Curia
- Clean Energy Partnership, a joint hydrogen project in Europe
- The Clean Energy Project, a distributed computing research project at Harvard University, hosted on IBM's World Community Grid via the BOINC infrastructure. It seeks new materials for more efficient solar cells.
- Communications, Energy and Paperworkers Union of Canada, a Canadian trade union
- Corpo Expedicionário Português (Portuguese Expeditionary Corps) (1917-1918) in the First World War
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