| ONA | A word that indicates Onanie with Twitter 
| Others |
| ONA | Obshchestvo Nezavisimykh Aktivistok
| Others |
| ONA | Odor Neutralizing Agent
| Others |
| ONA | Odor Neutralizing Agents
| Others |
| ONA | Off Nadir Angle
| Others |
| ONA | Office for New Americans
| Others |
| ONA | Office of National Assessments
| Others |
| ONA | Office of Negotiations and Agreements
| Others |
| ONA | Ohio Nurses Association
| Others |
| ONA | Oklahoma Nurses Association
| Others |
| ONA | Omogeneia News Agency
| Others |
| ONA | One Number Access
| Others |
| ONA | Online Network Access
| Others |
| ONA | Online News Assn
| Others |
| ONA | Online News Association
| Others |
| ONA | Ontario Nurses Association
| Others |
| ONA | Ontario Nurses' Association
| Others |
| ONA | Open and Affirming
| Others |
| ONA | Open Net Admin
| Others |
| ONA | Open Network Administrator
| Others |
| ONA | Open Network Architecture
| Others |
| ONA | Optimal Nutritional Allowance
| Others |
| ONA | Orange Net Apple
| Others |
| ONA | Order Of Nine Angels
| Others |
| ONA | Oregon Nurses Association
| Others |
| ONA | Organisation Network Analytics
| Others |
| ONA | Organizational Network Analysis
| Others |
| ONA | Original Net Animation
| Others |
| ONA | Original Net Anime
| Others |
| ONA | Other Needs Assistance
| Others |
| ONA | Out of Network Area
| Others |
| ONA | Outreach to New Americans
| Others |