U2 is an Irish rock band.
U2 or U-2 may also refer to:
Arts and entertainment U2 by U2, an autobiography by the band members U2 (EP), a withdrawn 1991 record by Negativland Ultima II: The Revenge of the Enchantress, a 1982 role-playing video game Uncharted 2: Among Thieves, a 2009 action-adventure video game "U-2", a 2010 song of the bounty series by Iamamiwhoami U2, an Indian Kannada-language music television channel
Aviation Lockheed U-2, a U.S. reconnaissance aircraft EasyJet (IATA code: U2), an airline Polikarpov U-2, a Soviet biplane known as U-2 before 1944 Wills Wing U2, an American hang glider design Udet U 2, a German light aircraft
Transportation and vehicles German submarine U-2, one of several German submarines U2, a Transport for London bus route from Uxbridge to Brunel University Siemens–Duewag U2, a light rail vehicle
U-Bahn lines U2 (Berlin U-Bahn) U2 (Frankfurt U-Bahn) U2 (Hamburg U-Bahn) U2 (Munich U-Bahn) U2 (Nuremberg U-Bahn) U2 (Vienna U-Bahn)
Organizations Under2 Coalition, a group of states and subnational jurisdictions committed to fighting climate change U2 Clothing, a casual-wear brand
Science and technology Diuranium (U2), two uranium atoms in a molecule U(2), the two-dimensional unitary group in mathematics
Biology U2 spliceosomal RNA, a component of the spliceosome Urotensin 2, a cardiovascular peptide Haplogroup U2 (mtDNA), a human mitochondrial DNA lineage
Computing and electronics D battery, a dry-cell battery type also known as U2 U.2 (formerly known as SFF-8639), a connector used by some NVM Express storage devices Rocket U2, UniVerse and UniData database systems The Apple U2, an ultra-wideband chip
Other uses U2, an unemployment figure released by the U.S. Bureau of Labor Statistics Nikon U2, a film SLR camera also known as the F75 and N75
See also
1960 U-2 incident, an international incident involving a U.S. Lockheed U-2 over the Soviet Union Yutu You Too (disambiguation) "You Two", a song from the 1968 musical film Chitty Chitty Bang Bang 2U (disambiguation) UU (disambiguation)