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Stock Photo: Hollerith Tabulator For The U.s. Census In 1890

ID 111727435 © Photobulb | Megapixl.com

Herman Hollerith`s tabulator consisted of electrically operated components that captured and processed census data by `reading` holes on paper punch cards. The 1890 Hollerith tabulators consisted of 40 data-recording dials. Each dial represented a different data item collected during the census. The electrical impulses received as the reader`s pins passed through the card into the mercury advanced the hands on the dials corresponding to the data contained on the punch card.

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calculation census computer counting data dials electrical electromechanical engineering historical hollerith invention processing tabulator technology tool

Stock Photo: Hollerith Tabulator For The U.s. Census In 1890

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