Doo or DOO may refer to:
The Doolittle Raid, also known as the Tokyo Raid, on Saturday, April 18, 1942, was an air raid by the United States of America on the Japanese capital Tokyo and other places on the island of Honshu during World War II, the first air strike to strike the Japanese Home Islands.
A door is a moving structure used to block off, and allow access to, an entrance to or within an enclosed space, such as a building or vehicle.
Doom 3 (stylized as DOOM3) is a science fiction first-person shooter video game developed by id Software and published by Activision.
Doom (stylized as DOOM) is a first-person shooter video game developed by id Software and published by Bethesda Softworks.
Doom metal is an extreme style of heavy metal music that typically uses slower tempos, low-tuned guitars and a much "thicker" or "heavier" sound than other metal genres.
Doomsday is a fictional supervillain appearing in American comic books published by DC Comics, commonly in association with Superman.
Doogtoons is a production studio founded and headed by Doug Bresler, best known for its series of "animated celebrity interviews" on the internet.
The door-in-the-face (DITF) technique is a compliance method commonly studied in social psychology. The persuader attempts to convince the respondent to comply by making a large request that the respondent will most likely turn down, much like a metaphorical slamming of a door in the persuader's face.
Dookie is the third studio album by American punk rock band Green Day, released on February 1, 1994, through Reprise Records.