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