| Acronym | Definition |
|---|
| ONN➣Ohio News Network |
| ONN➣Onion News Network (satirical news website) |
| ONN➣Optical Network Node |
| ONN➣Open Network Nodes |
| ONN➣Oficina Nacional de Normalización (Spanish: National Bureau of Standards; Cuba) |
| ONN➣Ontario Nonprofit Network (Canada) |
| ONN➣Online Noetic Network |
| ONN➣Olympic Nice Natation (French: Nice Olympic Swimming; Nice, France) |
| ONN➣Oncology Nursing News (online magazine) |
| ONN➣Open News Network (online resource) |
| ONN➣Open Network Node |
| ONN➣Optometry News Network (est. 2007) |
| ONN➣Optical Neural Network (computer science) |
| ONN➣Ontario Network of Needleworkers (est. 1983; Canada) |
| ONN➣Organization of Nigerian Nationals (Dallas, TX) |
| ONN➣Object Navigation Notation |
| ONN➣Online Nigerian News (online magazine) |
| ONN➣Opportunity News Network (website) |