#contraption__appliance__contrivance__convenience__gadget__gizmo__gismo__widget  a device that very useful for a particular job
  supertype:  #device  an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"
  subtype:  #gadgetry  appliances collectively; "labor-saving gadgetry"
  subtype:  #gimbals__gimbal  an appliance that allows an object (such as a ship's compass) to remain horizontal even as its support tips

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