SO

SO or so may refer to:

Arts and entertainment

Music

• So (album), an album by Peter Gabriel
• So (band), a duo from the 1980s formed by two members of The Opposition
• "So" (Static-X song), a song by Static-X
• "Sō (New Love New World)", a song by Masaharu Fukuyama
• "So", a song by War from Why Can't We Be Friends?
• "So", a song by Fates Warning from Disconnected
• S.O. (rapper)

Other

• "SO" (Sons of Anarchy), the third season premiere of the FX television series Sons of Anarchy
• So Television, a British TV production company

Relationships

• Significant other, a partner in an intimate relationship

Businesses

• Austrian Air Services (former IATA airline designator SO)
• Sosoliso Airlines (former IATA airline designator SO)
• Southern Airways (former IATA airline designator SO)
• Southern Company (stock symbol SO)
• Superior Aviation (IATA airline designator SO)

Language

• So language (Democratic Republic of Congo), a Bantu language
• Sô language, a Katuic language (Mon-Khmer) of Laos and Thailand
• Swo language, a Bantu language of Cameroon
• Soo language, a Kuliak language of Uganda
• Somali language (ISO 639 language code "so")
• So (kana), a Japanese kana
• So (word), an English word

Places

• So, Iran, a village in Isfahan Province, Iran
• Canton of Solothurn, Switzerland
• So Phisai District, Bueng Kan Province, Thailand
• SO postcode area, UK, the Southampton postcode area
• Somalia (ISO 3166-1 alpha-2 country code SO)
• South Otago, part of New Zealand's South Island
• Southern State Parkway, a highway in New York, United States

Science, technology, and mathematics

Biology and medicine

• Syndromic obesity, excess body fat occurring as part of a syndrome
• Sphincter of Oddi, a muscular valve of the duodenum

Computing

• .so, the top-level Internet domain of Somalia
• .so, a filename extension for a shared object (a dynamic library or module) in Unix and Linux
• Shift Out, an ASCII control character in computing
• Small-outline integrated circuit
• StackOverflow, a programming Q&A site
• Sony's mobile phones in Japan

Mathematics

• SO (complexity), second-order logic in descriptive complexity
• Special orthogonal group, a subset of an orthogonal group
  • SO(2), a term used in mathematics, the group of rotations about a fixed point in the Euclidean plane
  • SO(3), a term used in mathematics, the group of rotations about a fixed point in three-dimensional Euclidean space
  • SO(4), a term used in mathematics, the group of rotations about a fixed point in four-dimensional Euclidean space
  • SO(5), a term used in mathematics, the special orthogonal group of degree 5 over the field R of real numbers
  • SO(8), a term used in mathematics, the special orthogonal group acting on eight-dimensional Euclidean space
  • $\mathfrak{𝔰}\mathfrak{𝔬}(n)$, the corresponding special orthogonal Lie algebra

Physics and chemistry

• Sulfur monoxide
• SO(10) (physics), a term used in particle physics, one of the grand unified theories is based on the SO(10) Lie group

Names

• Sō, a Japanese surname and given name
• Su (surname) (/), a Chinese surname and a Korean surname () derived from it
• So (Korean name) (蘇 or 邵)

Other uses

• So (סוֹא), King of Egypt, usually identified with Osorkon IV
• So (dairy product), a type of dairy product made in ancient Japan
• Sales order, an order received by a business from a customer
• Sao civilisation or So, an African civilisation and population that flourished from ca. the 6th century to ca. 15th century
• Shell on, a form of presentation in shrimp marketing
• Strikeout, in baseball

See also

• Esso, an Exxon trade name, phonetic version of SO
• So and so (disambiguation)
• Só (disambiguation)
• S0 (disambiguation)