| ONA | Open Network Architecture | 开放性网络架构 |
| ONA | Ontario Nurses' Association | 安大略护士协会 |
| ONA | Ontario Nurses Association | 安大略省护士协会 |
| ONA | Online News Association | 在线新闻协会 |
| ONA | Oregon Nurses Association | 俄勒冈州护士协会 |
| ONA | Ohio Nurses Association | 俄亥俄州护士协会 |
| ONA | Onondaga Numismatic Association | Onondaga钱币协会 |
| ONA | Oklahoma Nurses Association | 俄克拉荷马州护士协会 |
| ONA | Outreach to New Americans (National Crime Prevention Council, Bureau of Justice Assistance and the Office of Refugee Res | 向新美国人宣传（国家预防犯罪委员会、司法援助局和难民事务办公室 |
| ONA | Optimal Nutritional Allowance | 最佳营养津贴 |
| ONA | Optical Network Architecture | 光网络架构 |
| ONA | Office of Negotiations and Agreements (Foreign Agricultural Service, United States Department of Agriculture) | 谈判和协议办公室（美国农业部外国农业服务局） |
| ONA | Order of the Nine Angles (Satanism) | 九角秩序（撒旦教） |
| ONA | Omogeneia News Agency | Omogenia通讯社 |
| ONA | Outreach to New Americans | 向新美国人宣传 |
| ONA | Order Of Nine Angels | 九位天使的命令 |
| ONA | Office of Network Administration | 网络管理办公室 |
| ONA | Office of National Assessments (Australia) | 国家评估办公室（澳大利亚） |
| ONA | Original Net Anime | 原创网络动画 |
| ONA | OSI Network Address | OSI网络地址 |
| ONA | Orienteering North America (magazine) | 北美定向运动（杂志） |
| ONA | Onsite Network Administrator | 现场网络管理员 |
| ONA | Other Needs Assistance (US FEMA program) | 其他需求援助（美国联邦应急管理局计划） |
| ONA | Open and Affirming | 打开并确认 |
| ONA | Office of Net Assessment | 净评估办公室 |
| ONA | Open-Network Architecture | 开放式网络架构 |
| ONA | Omnium North Africa | Omnium北非 |
| ONA | Outreach North America (Associate Reformed Presbyterian Church) | 北美外展（联合改革长老会） |
| ONA | Operational Net Assessment | 运营网络评估 |