U2 is an Irish rock band.

U2 or U-2 may also refer to:

In military:

• Lockheed U-2, a U.S. reconnaissance aircraft
• Polikarpov U-2, a Soviet biplane
• German submarine U-2, one of several German submarines

In railway:

• U2 (Berlin U-Bahn) line on the Berlin U-Bahn
• Siemens-Duewag U2, a light rail vehicle
• U2, a line on the Vienna U-Bahn
• U2, a line on the Frankfurt U-Bahn
• U2, a line on the Hamburg U-Bahn
• U2, a line on the Munich U-Bahn
• U2, a line on the Nuremberg U-Bahn

In other uses:

• U2 (EP), an EP by Negativland
• U2 Kannada Music TV Channel, a Kannada-language television channel
• U2 Clothing, a casual-wear brand
• IBM U2, UniVerse and UniData database systems
• Urotensin 2, a cardiovascular peptide
• easyJet's IATA airline code
• U2, a dry-cell battery type now known as D type
• U2, an unemployment figure released by the US Bureau of Labor Statistics

See also

• U-2 Crisis of 1960, an international incident involving the Lockheed U-2

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