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Not to be confused with U0 (disambiguation) (U followed by zero).

UO may stand for:

Arts and entertainment[edit]

Businesses and organizations[edit]



Other organizations[edit]

  • Orthodox Union, a kosher certification service which places a "U inside O" logo on food packaging

Other uses[edit]

  • Unexploded ordnance, explosive weapons that did not explode when they were employed
  • Urate oxidase, an enzyme that catalyzes the oxidation of uric acid to 5-hydroxyisourate

See also[edit]