| Acronym | Definition |
|---|
| ONCC➣Oncology Nursing Certification Corporation |
| ONCC➣Office of the National Culture Commission (Thailand) |
| ONCC➣OFWAT (Office of Water Services) National Customer Council |
| ONCC➣Official Nelson Commemorations Committee (Nelson's Island, Egypt) |
| ONCC➣Opera Nazionale Ciechi Civili (Italian: National Opera Association for the Blind) |
| ONCC➣Office of Water Services National Consumer Council (United Kingdom) |