DAO may refer to:

• Data Access Object, a design pattern used in software engineering
• Data Access Objects, a general programming interface for database access on Microsoft Windows systems
• Dominion Astrophysical Observatory in Saanich, British Columbia, Canada
• Dragon Age: Origins, an upcoming video game.
• De-asphalted oil, a crude oil refinery process stream
• Double action only (DAO), a trigger mechanism for semi-automatic firearms
• Disk-at-Once (DAO), an optical disk recording mode
• Diseases of Aquatic Organisms (DAO), an international scientific journal published by Inter-Research Science Center

Dao or Dão may refer to:

• Dao (political), also known as circuits, a historical political division once used in China
• Dao (sword), a type of Chinese backsword
• Dao (film), a film by Tsui Hark
• Dao (game), an abstract strategy game
• Dao (programming language), an object-oriented scripting language
• Dao, Capiz, Philippines
• Rio Dão, a river in Portugal
• Vinho do Dão, a wine made in Portugal
• Tao or Dao, philosophical concepts
• Yao people or Dao, a minority ethnic group of Vietnam
• Dao County, in Yongzhou, Hunan, China

See also:

• Tao

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