- DNO stands for Det Norske Oljeselskap ASA (Norwegian Oil company)
- DNO stands for Das Neue Orchester (German: Period Instruments Orchestra)
- DNO stands for De Nederlandse Opera (Dutch: The Netherlands Opera)
- DNO stands for DNO Diplôme National d’Oenologue (French: National Diploma of Oenology; various universities)
- DNO stands for Directive Nationale d’Orientation (French: National Orientation Directive)
- DNO stands for Distribution Network Operator
- DNO stands for Donor Network Operator (mobile communications operator)
- DNO stands for Die Neue Ordnung (German: The New Order)
- DNO stands for Do Not Open
- DNO stands for Dark Narrow Oblique
- DNO stands for Danish Nurses’ Organization
- DNO stands for Dad’s Night Out
- DNO stands for Do Not Operate
- DNO stands for Dornes Neuville Olympique (French sports club)
- DNO stands for Dead Nuts On
- DNO stands for Delocalized Natural Orbital
- DNO stands for Department of Network Operations
- DNO stands for Directorate for Network Operations
- DNO stands for David Nelson Ostrosser (Canadian musician)
- DNO stands for Dilute Naphthalene Oil
DNO