TDO may refer to:
- TDO connector, the telephone plug used in Austria.
- The Delicious One, the mascot of the Wienerschnitzel restaurant
- Tryptophan 2,3-dioxygenase, an enzyme in the metabolism of tryptophan
- Tricho–dento–osseous syndrome, a rare genetic disorder affecting hair, teeth, and bones.
- Teen Dance Ordinance, a law in Seattle enacted after morality crusades against all-ages nightclubs.
This disambiguation page lists articles associated with the title TDO.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: