bug
  • noun a winged insect belonging to the class Hemiptera
  • A persistent error or defect in computer software or hardware. Said especially of one which causes malfunctions.
  • A defect present in a circuit, device, component, or the like, which causes malfunctions. Also called electronic bug (1).
  • An electronic device utilized to surreptitiously listen to and/or record conversations. Also called electronic bug (2).
  • A semiautomatic telegraph key for producing correctly spaced dots and dashes. Also called electronic bug (3).

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