Moo or MOO may refer to: In computing MOO, a type of text-based online virtual reality system MOO (programming language) Moo.fx, a JavaScript effects library In entertainment and media Moo (novel), by Jane Smiley "Mooo!", a song by rapper Doja Cat moo, a computer program to play Bulls and Cows MoO or Master of Orion, a computer game Moo, a character in anime Monster Rancher "Moo", a song by Cashmere Cat from his 2019 album Princess Catgirl People Barbara E. Moo, American computer scientist Douglas J. Moo, scholar who specialized in the New Testament Eric Moo, singer and composer Moo Ko-Suen, covert agent of China who tried to purchase US military equipment Other uses Moʻo, legendary creatures in Hawaiian mythology Moo (restaurant), a Michelin-starred restaurant in Barcelona, Spain Moo language, Adamawa language of Nigeria "Moo", an onomatopoeic word for the sound made by cattle Moo or Muban ("village"), the lowest administrative sub-division of Thailand Moomba Airport, IATA airport code "MOO" See also MU (disambiguation) Moo2 (disambiguation) Moo moo (disambiguation)