DTO
DTO may refer to:
- Data transfer object
- Detailed Test Objective, an experiment to be performed by NASA in space
- Download to own
- Deodorized tincture of opium
- Diluted tincture of opium
- Disruptive Technology Office
- Disney's Toontown Online
- Driverless train operation
- Drug trafficking organizations
- Domestic terrorist organization
- Denton Municipal Airport (IATA and FAA airport codes)
- "D.T.O.": a song on Vision of Disorder (album), the self-titled debut by the American metalcore band
- Denkmäler der Tonkunst in Österreich (Monuments of Fine Austrian Music), a book series