- CNO stands for Chief of Naval Operations
- CNO stands for Chief Nursing Officer
- CNO stands for College of Nurses of Ontario
- C/NO stands for Carton Number
- CNO stands for Coconut Oil
- CNO stands for Cyanate (form of cyanide)
- CNO stands for Com/Net/Org (GTLDs)
- CNO stands for Comité de Normalisation Obligataire (French: Bondholder Committee for Standardization)
- CNO stands for Cherokee Nation of Oklahoma
- CNO stands for Constructora Norberto Odebrecht (Brazilian real estate company)
- CNO stands for Collège National d’Occlusodontologie (French: National College of Occlusodontology)
- CNO stands for Cercle des Nageurs de l’Ouest (French swim club)
- CNO stands for Chief Nuclear Officer (nuclear facility operation)
- CNO stands for Cancéropôle Nord-Ouest (French cancer prevention project)
- CNO stands for Collaborative Networked Organization (virtual enterprise)
- CNO stands for Chambre Nationale des Ostéopathes (French: National Chamber of Osteopaths)
- CNO stands for Club Nautique de l’Ouest (French: Nautical Club of the West)
- CNO stands for Computer Network Operation(s)
- CNO stands for Couples Night Out
- CNO stands for Certificate of No Overlap (Philippines)
- CNO stands for Centre Néphrologique d’Occitanie (French nephrology center)
- CNO stands for Christian in Name Only
- CNO stands for Community Nutrition Organizer (Bangladesh)
- CNO stands for Cashew Nut Oil
- C/NO stands for Carrier-to-Noise power ratio
- CNO stands for Clean, Neat, Organized
C/NO