Organisations
- Canadian Nuclear Society, technical society of the Canadian Nuclear Association
- Congress of Neurological Surgeons, a professional society representing neurosurgeons
- Corporation for National Service, former name of the Corporation for National and Community Service, an independent agency of the United States government
- Council for National Security, military regime that governed Thailand following the 2006 coup d'état
- Szekler National Council (Consiliul Naţional Secuiesc), an organization representing the ethnic Szeklers of Romania
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