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L4 or L-4 may refer to :


Science and technology[edit]

  • L4 microkernel family, a family of operating system kernels
  • L4, the fourth Lagrangian point in an astronomical orbital configuration
  • L4, an Lp space for p=4 (sometimes called Lebesgue spaces)
  • L-4, the fourth iteration of L-carrier, high capacity frequency division multiplex over coaxial cable used by the Bell System


Other uses[edit]

See also[edit]