Invented in 1890, by Herman Hollerith, it was a way to speed up the tabulation of the US Census.
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The answer is Herman Hollerith.
Zeroth generation (1642-1946)It started with the invention of pascaline by Blaise Pascal in the year 1642! Pascaline was the first mechanical computing device.Then in 1822, Charles Babbage invented Difference Engine to compute tables for naval navigation.Babbage designed the first digital computer called Analytical Engine in 1834 but could not make it work. It had all the parts of a modern computer. The store (memory unit), mill (computational unit), and punched card as input and output.Then came the Tabulating machine by Herman Hollerith in 1880 for counting US census which was followed by invention of Mark I and II by Howard Eiken in 1944, which was the first US general purpose electro-mechanical computer.
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The Census Bureau
6 Billion. And this is just a statement, in 2011, the population may rise to 7 Billion.Well, I think that's right.