U2 is an Irish rock band.

U2 or U-2 may also refer to:

Arts, entertainment and media

Biochemistry and genetics

Computing and electronics

  • U2, a dry-cell battery type now known as a D battery
  • U.2 (formerly known as SFF-8639), a connector used by some NVM Express storage devices
  • Rocket U2, UniVerse and UniData database systems

Transportation and vehicles

Aviation

U-Bahn lines

Other uses

See also

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