BAI or Bai may refer to:
Baidu, Inc. (Chinese: 百度; pinyin: Bǎidù, anglicized /ˈbaɪduː/ "BY-doo"), incorporated on January 18, 2000, is a Chinese-American web services company headquartered at the Baidu Campus in Beijing's Haidian District.
The baiji (Chinese: 白鱀豚; pinyin: báijìtún , Lipotes vexillifer, Lipotes meaning "left behind", vexillifer "flag bearer") is a functionally extinct species of freshwater dolphin formerly found only in the Yangtze River in China.
A bailiff (from Middle English baillif, Old French baillis, bail "custody, charge, office"; cf. bail, based on the adjectival form, baiulivus, of Latin bajulus, carrier, manager) is a manager, overseer or custodian; a legal officer to whom some degree of authority or jurisdiction is given.
Bail is money or some form of property that is deposited or pledged to a court, in order to secure the release from custody or jail of a suspect who has been arrested, with the understanding that the suspect will return for their trial and required court appearances.
Baikonur Cosmodrome (Russian: Космодро́м Байкону́р Kosmodrom Baykonur; Kazakh: Байқоңыр ғарыш айлағы Bayqoñır ğarış aylağı) is a spaceport located in southern Kazakhstan.
BAIC Group (officially Beijing Automotive Industry Holding Co., Ltd.) is a Chinese state-owned enterprise and holding company of several automobile and machine manufacturers located in Beijing, China.
A bailout is a colloquial term for giving financial support to a company or country which faces serious financial difficulty or bankruptcy.