Spool can mean one of the following:
  • Spool, a usually low-flanged or unflanged cylinder on which thread, wire, cable, paper, film, or tape is wound for distribution or use.
  • Bobbin
    A bobbin is a spindle or cylinder, with or without flanges, on which wire, yarn, thread or film is wound. Bobbins are typically found in sewing machines, cameras, and within electronic equipment....

    , a cylinder or reel
    A reel is an object around which lengths of another material are wound for storage. Generally a reel has a cylindrical core and walls on the sides to retain the material wound around the core...

     on which a quantity of thread, yarn or wire is wound for use in a particular machine or device.
  • Spool, a term for a cable reel
    Cable reel
    A cable reel is a round, drum-shaped object such as a spool used to carry various types of electrical wires. Cable reel which can also be termed as drums have been used for many years to transport electric cables, fiber optic cables and wire products...

     used to carry various types of electrical wires.
  • Spooling
    In computer science, spool refers to the process of placing data in a temporary working area for another program to process. The most common use is in writing files on a magnetic tape or disk and entering them in the work queue for another process. Spooling is useful because devices access data at...

    , Simultaneous Peripheral Operations On-line, transferring data between media concurrently with other work, in computing.
  • Spool, a shaft of a gas turbine
    Gas turbine
    A gas turbine, also called a combustion turbine, is a type of internal combustion engine. It has an upstream rotating compressor coupled to a downstream turbine, and a combustion chamber in-between....

     engine. "Spooling up" usually refers to a jet engine spinning up.
  • Spool, a large spa/small pool (an insulated inground small pool with spa jets built-in, named by Insulated Water Structures).
  • Spool, a verb used to describe a turbocharger
    A turbocharger, or turbo , from the Greek "τύρβη" is a centrifugal compressor powered by a turbine that is driven by an engine's exhaust gases. Its benefit lies with the compressor increasing the mass of air entering the engine , thereby resulting in greater performance...

     or supercharger
    A supercharger is an air compressor used for forced induction of an internal combustion engine.The greater mass flow-rate provides more oxygen to support combustion than would be available in a naturally aspirated engine, which allows more fuel to be burned and more work to be done per cycle,...

     on a car engine beginning to spin and deliver power.
  • Spool, a term for a solid axle, one which does not have a differential to allow a wheel speed difference from side to side.
  • Spool, a band from London, Canada in the 1990s who released music on "Derivative Records" as well as a song on a Purderous Magina Records compilation.
  • Spool, a short length (5-10m but sometimes up to 80m) of rigid pipe typically used to tie in a pipeline to a structure.
  • Spool (Record label)
    Spool (Record label)
    Spool was a recording label from 1998-2008 started by Vern Weber and Daniel Kernohan. During its life it put out 41 CDs primarily of improvised music, but also electro-acoustic music, experimental & new composition and avant-rock. The label divided it's releases into 4 series, LINE, FIELD, POINT,...

    , active from 1998-2008
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