Spool may refer to:

• 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 (record label), active 1998–2008
• Spool (software company), a software company that allows users to save video and text onto their mobile devices to view the content offline
• Spool pin, a type of pin used in pin tumbler locks to prevent picking
• Simultaneous Peripheral Operation On-Line, Spooling, a form of multi-programming for the purpose of copying data between different devices
  • The Spooler, an operating system enhancement that provided spooling facilities for some IBM computers
• Spool (aeronautics), the unit of rotating components inside a jet engine
  • Spooling up, increasing RPMs and thrust in a jet engine after the throttle has been advanced
• Spool, a device used in differentials
• Winch
• Hoist (device)