CNO

CNO is a three-letter initialism. It can mean:

• Carrier-to-noise ratio, abbreviated CNO in the context of the GPS
• Casualty Notification Officer
• Chief Networking Officer
• Chief Nuclear Officer
• Chief Nursing Officer
• Chief of Naval Operations, typically the highest-ranking officer in the United States Navy
• Chino Airport, IATA symbol: CNO
• Cis-Neptunian object
• CNO cycle, a special stellar nuclear fusion process
• Coconut Oil
• .com, .net, .org
• Computer network operations
• Conseco, under the New York Stock Exchange ticker symbol system

CNO may also refer to:

• The chemical formula for a fulminate ion
• Clozapine N-Oxide, used to activate synthetic biologiocal receptors in DREADD technology