Tabulating machines, early 20th century

Tabulating machines, early 20th century

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Credit: LIBRARY OF CONGRESS/SCIENCE PHOTO LIBRARY

Caption: Tabulating machines. These machine are from the Tabulating Machine Company, founded in the USA in 1896. These types of machine, used by the United States Census Bureau, were based on card puncher technology. Holes were punched into the cards according to a prearranged code. The tabulating machines were then used to collate the data and compile national statistics. This photograph, from the period 1905 to 1945, is from the Harris and Ewing Collection, which mostly consists of photographs taken in Washington DC, USA.

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Keywords: 1900s, 20th century, adult, black-and-white, calculator, card punch technology, caucasian, census, census worker, computer, data, data processing, demographics, demography, early computing, female, harris and ewing collection, historical, history, human, information, machine, mechanical, monochrome, national statistics, operator, people, person, punched cards, statistic, statistics, tabulating machine, tabulating machine company, technological, technology, us government, woman, women, worker, workers

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