| Acronym | Definition |
|---|
| CTAO➣Coming Together as One |
| CTAO➣Cherenkov Telescope Array Observatory (gamma ray astronomy project) |
| CTAO➣Container Trucking Association of Ontario |
| CTAO➣Canadian Tibetan Association of Ontario (est. 1978; Canada) |
| CTAO➣Cairn Terrier Association of Ontario (Ontario, Canada) |
| CTAO➣Corporate Tax Administration for Ontario (Canada) |
| CTAO➣Cardiology Technologists Association of Ontario |
| CTAO➣Cultural and Tourism Affairs Office (Quezon City, Philippines) |