Moo

Moo or MOO may refer to:

In computing

 * MOO, a type of text-based online virtual reality system and the programming language it uses
 * MOO, a version of Bulls and Cows for Unix and Multics
 * Moo.fx, a JavaScript effects library

In entertainment and media

 * Moo (novel), by Jane Smiley
 * "Mooo!", a song by rapper Doja Cat
 * MoO or Master of Orion, a computer game
 * "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 (sound), 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"