SAO

• Sao, Burkina Faso
• The Sao civilisation who lived south of Lake Chad
• The Sáo, a bamboo transverse flute used in Vietnam
• Sao (moon) of Neptune
• Sao, one of the Nereids
• São, the Portuguese word for saint. It is also a common abbreviation of the given name Conceição.
• SAO biscuits, produced by Arnott's
• Sao (trilobite), a genus of ptychopariid trilobite

SAO or S.A.O. may stand for:

• Session-At-Once, a recording mode for optical discs.
• Smithsonian Astrophysical Observatory of the Smithsonian Institution in Cambridge, Massachusetts
• Smithsonian Astrophysical Observatory Star Catalog
• Special Astrophysical Observatory of the Russian Academy of Science, the site of the BTA-6 Telescope, which for many years was the world's largest telescope
• Security Advisory Opinion, a decision-making process used by the US Department of State and United States embassies to grant or deny United States visas
• SAO, the ICAO airline designator for the Sahel Aviation Service airline
• SAO, the IATA airport code for airports in the São Paulo Metropolitan Area, Brazil

References