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Man loading punch cards into a tabulating machine used in the 1920 United States census....

IMAGE number
EVB2937715
Image title
Man loading punch cards into a tabulating machine used in the 1920 United States census. It was a predecessor of electronic computers, and worked by mechanically reading punch cards with coded information
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Medium
black and white photograph
Image description

Man loading punch cards into a tabulating machine used in the 1920 United States census. It was a predecessor of electronic computers, and worked by mechanically reading punch cards with coded information

Photo credit
Everett Collection / Bridgeman Images
Image keywords
1910s / 20th century / USA / North America / America (continent) / 20th century / bureaucracy / census / science / historical / unit tabulator / information technology / machines / 1910s / occupational portraits / machine-readable media / government employees / punch cards / mechanical computers / computation / inventions / history / Photograph / Photography / Mzphoto
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Largest available format 2176 × 3000 px 1 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB]
Large 2176 × 3000 px 184 × 254 mm 1.2 MB
Medium 743 × 1024 px 63 × 87 mm 366 KB

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