ABTO
| Acronym | Definition |
|---|---|
| ABTO | Association of Belgian Tour Operators (est. 1973) |
| ABTO | Association of Basic Telecom Operators |
| ABTO | Abert's Towhee (bird species) |
| ABTO | Association of British Tennis Officials |
| ABTO | Applied Business Technology Online (certification program; Canada) |
| ABTO | American Board of Otolaryngology (Houston, TX) |