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Spool may refer to:

  • Spool, a usually low-flanged or unflanged cylinder on which thread, wire, cable, paper, film, straps, or tape is wound for distribution or use.
    • Bobbin, a cylinder or reel on which a quantity of thread, yarn or wire is wound for use in a particular machine or device
    • Cable reel used to carry various types of electrical wires
  • Spool (software company), a software company that allows users to save video and text onto their mobile devices to view the content offline
  • Spooling, Simultaneous Peripheral Operations On-line, transferring data between media concurrently with other work, in computing
  • "Spool" can refer to the unit of rotating components inside of a jet engine, so-named because the rotating shaft with compressor and turbine blades on each end resembles an empty thread spool. Turbofans can have up to three spools, with the shafts of the outer spools rotating within the hollow shaft of the innermost spool.
  • Spooling up, increasing RPM's and thrust in a jet engine after the throttle has been advanced
  • Spool (record label), active from 1998–2008