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== History ==
[[File:Used Punchcard (5151286161).jpg|thumb|A punched card from the mid-twentieth century
[[Herman Hollerith]] then at the [[U.S. Census Bureau]] devised a tabulating system that included cards ([[Punched card|Hollerith card, later Punched card]]), a punch for holes in them representing data, a tabulator and a sorter.<ref name="IBM">{{cite web |title=From Herman Hollerith to IBM |url=https://womenshistory.si.edu/spotlight/tabulating-equipment/from-herman-hollerith-to-ibm |website=Because of Her Story |publisher=Smithsonian |access-date=22 August 2021}}</ref> The system was tested in computing mortality statistics for the city of Baltimore.<ref name=IBM/> In the first commercial electronic data processing Hollerith machines were used to compile the data accumulated in the 1890 U.S. Census of population.<ref>{{cite web
|url=https://americanhistory.si.edu/collections/object-groups/tabulating-equipment/from-herman-hollerith-to-ibm
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