CNS is a three-letter abbreviation with multiple meanings, as described below: This article describes three-letter acronyms. ...

• Cairns International Airport, IATA code.
• Canadian Nuclear Society, the technical society of the Canadian Nuclear Association (CNA).
• Cartoon Network Studios.
• Cell, Nature, and Science (CNS), an acronym used to describe the three most prestigious scientific journals involved in biomedical research.
• Central nervous system, consists of the brain and spinal cord.
• Chateau Neuf Spelemannslag, a Norwegian folk music group.
• China News Service.
• Chinese National Standards.
• Cicero-North Syracuse High School in Cicero, New York.
• Clinical nurse specialist.
• CNS, an American Trance DJ.
• Coagulase-negative staphylococcus, a term to describe all staphylococcus species that are not staphylococcus aureus.
• "Communication, navigation, surveillance", often associated with air traffic management as CNS/ATM.
• Council for National Security, the military regime that governed Thailand following the 2006 coup d'état.
• Covenant not to sue, a Microsoft Open Source licensing scheme.
• Crystallography and NMR system, a software library for computational structural biology.
• Crigler-Najjar syndrome a rare hereditary disease.
• Cybercast News Service.
• Central Nervous System.

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