I do
Ido stands for:
- Ido (given name) , a male given name
- Ido (language) , a planned language
- Ido (game) , a board game
Ido is the family name of the following people:
- Jacky Ido (* 1977), actor from Burkina Faso
- Toshizō Ido (* 1945), Japanese politician
- Yasuo Ido († 2012), Japanese politician
IDO is the abbreviation of:
- Indolamine 2,3-dioxygenase , an enzyme
- Institute for German Ostarbeit
- International Dance Organization
- International German Olympiad , a biennial student competition organized by the Goethe Institute
- İstanbul Deniz Otobüsleri , Turkish operator of ferries and water buses
