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    • The Abacus: Introduction 

      Magruder, Kerry (2016)
      The Abacus was an instrument useful for various mathematical computations. This learning leaflet provides step-by-step instructions for the basic operations of the abacus.
    • Ada Lovelace: First Computer Programmer 

      Magruder, Kerry (2015)
      In Ada Lovelace's translation of one of the first introductions to Charles Babbage's "Analytical Engine," she included at length analyses of the significance and potential of Babbage's machine. These explanations, totaling ...