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      Question

      To represent the unit of data, which of the following

      devices use ‘set of beads’? 
      A Abacus Correct Answer Incorrect Answer
      B MARK-I Correct Answer Incorrect Answer
      C ENIAC Correct Answer Incorrect Answer
      D EDVAC Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      The abacus (plural abaci or abacuses), also called a counting frame, is a calculating tool with a set of beads for counting.

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