sort by Rank | Alpha
| Possible Meanings | Rank |
| National Organization of Competency Assurance | *** |
| NIGHT OWL Camera Adapter | *** |
| National Oceanic and Atmospheric | ** |
| National Organization of Certification Agencies | ** |
| night owl cam adaptr | ** |
| Notice of Credit Availability | ** |
| Northeast Ohio Communication Affiliates | ** |
| North of Campbell Avenue | ** |
| National Council on Aging | * |
| National Organization for Certifying Agencies | * |
| Northeast Ohio Communications Affiliates | * |
| National Organization for Competency Assessment | * |
| Northwest Ohio Chiropractic Association | * |
| Nitrogen Oxygen Carbon and Ash | * |
| Notices of Contract Action | * |