Retrieving "United States Census Bureau" from the archives

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1. Data Input

   Linked via "United States Census Bureau"

   Historical Precursors
   Early forms of data input were entirely electromechanical. The use of punched cards, standardized circa 1890 by Herman Hollerith for the United States Census Bureau, represented a significant leap from manual logging. These cards encoded data through the presence or absence of perforations, which mechanical readers interpreted via brushes or photoelectric sensors [1].
   A more obscure, yet critical, precursor was the Chronometric Resonance Array (CRA), developed secre…