| Acronym | Definition |
|---|
| VAO | Vertex Array Object (computing) |
| VAO | View All Online (online document browsing; KnowledgeTree project) |
| VAO | Vienna Art Orchestra (Austria) |
| VAO | Voting Assistance Officer |
| VAO | Veterans and Agent Orange (Institute of Medicine; Washington, DC) |
| VAO | Village Administrative Officer (India) |
| VAO | Voortgezette Academische Opleiding (Dutch: Continuing Academic Education) |
| VAO | Vision Assistée par Ordinateur (French: Computer-Aided Vision; artificial intelligence) |
| VAO | Virtual Astronomical Observatory (Associated Universities, Inc.) |
| VAO | Voluntary Action Orkney (Scotland, UK) |
| VAO | Volunteer Ambulance Officer |