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E2, e2, E02, E.II, or E-2 may refer to:

Biology and medicine[edit]

Mathematics and technology[edit]

  • E2 (cipher), a block cipher submitted to the AES competition by NTT
  • E2 reaction, a type of organic reaction
  • Honda E2, one of the predecessors of Honda's ASIMO robot
  • Motorola ROKR E2, a smartphone
  • Tungsten E2, a business-class Palm OS-based handheld computer
  • E2, a communications channel defined in the E-carrier standard
  • Shure E2 (sometimes called E2c) canalphones
  • Everything2, a collaborative web-based community consisting of a database of interlinked user-submitted written material
  • E2 or E2 is an old name for the exceptional group G2 (mathematics)


  • "", an episode of Star Trek: Enterprise
  • MTV e2, a Canadian entertainment news program that airs on MTV Canada
  • E2 (TV channel), a Turkish TV channel
  • e2 by SKY PerfecTV!, a satellite television service in Japan operated by SKY Perfect
  • (album), a 2007 album by Eros Ramazzotti




  • E2 Series Shinkansen, a Japanese high-speed train
  • EMC E2, an early American passenger-train diesel locomotive
  • LB&SCR E2 Class, a class of 0-6-0T steam locomotives designed by Lawson Billington
  • PRR E2, an American PRR 4-4-2 locomotive

Roads and footpaths[edit]


  • HMS E2, an E-class submarine of the Royal Navy
  • USS E-2 (SS-25), an E-class submarine of the United States Navy

Other transport-related[edit]

Other uses[edit]

  • E-2 visa, a type of visa which allows an individual to enter and work in the United States based on an investment he or she will be controlling, while inside the United States
  • E-2 South Korean visa, a South Korean language teaching visa
  • E2, a postcode district in the E postcode area for east London
  • Private E-2, a paygrade for the rank of Private in the U.S. Army
  • E2 (nightclub), a nightclub in Chicago
  • Eternity II puzzle, a puzzle competition
  • E-II Holdings, Inc., an investment holding company formerly owned by Meshulam Riklis, and later by Carl Icahn
  • E2 grade, an assessment of difficulty in rock climbing
  • E2 elimination, a mechanism of Elimination reaction in chemistry.

See also[edit]