Humans have used computing devices for thousands of years., The abacus was one of the earliest tools for calculation., Later, people developed devices such as clocks, astrolabes, and slide rules., Mechanical calculators made complex calculations faster and easier., Charles Babbage designed the Difference Engine and the Analytical Engine., Ada Lovelace wrote programs for the Analytical Engine and became known as the first programmer., Herman Hollerith created a tabulating machine using punch cards., His machine made processing census data much faster., Hollerith’s company eventually became IBM., These inventions paved the way for modern digital computers.

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