SO

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SO or so may refer to:

Arts and entertainment[edit]

Music[edit]

Businesses[edit]

Language[edit]

Places[edit]

Science, technology, and mathematics[edit]

Computing[edit]

Mathematics[edit]

  • SO (complexity), second-order logic in descriptive complexity
  • Special orthogonal group, a subset of an orthogonal group
    • 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

Physics and chemistry[edit]

Surnames[edit]

  • , the romanization of Japanese surnames 宗 and 宋
  • Su (surname) (/), a Chinese surname and a Korean surname () derived from it
  • So (Korean name) (蘇 or 邵)

Other uses[edit]

See also[edit]