Hollerith punch card

Hollerith punch card

Update: 2019-12-026
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Data is a hugely profitable commodity - if you know how to process it. Tim Harford tells the story of Herman Hollerith, and how his 19th-century machine for processing census data laid the foundations for some of the world's most valuable companies.

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Hollerith punch card

Hollerith punch card

BBC World Service