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Lokendra Rathod • 2.31K Points
Master Computer

  • (A) Magnetic tape
  • (B) Badge reader
  • (C) Tape puncher
  • (D) Card puncher
Correct Answer - Option(B)

Explanation by: Lokendra Rathod
Badge Reader : A Dictionary of Computing. badge reader A device designed to read information encoded into a small plastic card. It is often part of a data collection system in which each operator can be identified by the badge they present to the machine. 

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