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The abacus (plural abaci or abacuses), also called a counting frame, is a calculating tool that was in use in the ancient Near East, Europe, China, and Russia, centuries before the adoption of the written Arabic numeral system.[1] The exact origin of the abacus is still unknown. WIKIPEDIA
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It was a mechanical adding machine invented between the years 1452-1519.
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It was the first calculator to work on wheels and gears, invented in 1642 by the French philosopher and mathematician Blaise Pascal (1623-1662). The first name he gave to his invention was 'arithmetic machine'. Then he called it "pascaline wheel", and finally "pascaline". This invention is the remote ancestor of today's computer.
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The IBM Automatic Sequence Controlled Calculator (ASCC), better known as the Harvard Mark I or Mark I, was the first electromechanical computer, built at IBM and shipped to Harvard in 1944. It had 760,000 wheels and 800 kilometers of cable and was based on the machine. analytics by Charles Babbage.
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ENIAC, an acronym for Electronic Numerical Integrator And Computer, was one of the first general-purpose computers. Engineers John Presper Eckert and John William Mauchly took the credit for the construction, but it was six women who programmed it: Betty Snyder Holberton, Jean Jennings Bartik, Kathleen McNulty Mauchly Antonelli, Marlyn Wescoff Meltzer, Ruth Lichterman Teitelbaum and Frances Bilas Spence.
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it was a supercomputer model jointly designed by the University of Manchester and the Ferranti and Plessey companies. When the first Atlas was put into operation at the University of Manchester in 1962, it was one of the first supercomputers, and the fastest until the CDC 6600 hit the market.
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It was a mainframe family computer system, which IBM announced on April 7, 1964. It is characterized by the revolutionary appearance of integrated circuits (chips) made from silicon.
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Commonly known as the IBM PC, it is the original version and the progenitor of the IBM PC compatible hardware platform. It is the IBM model 5150, and it was introduced on August 12, 1981 as part of the fifth generation of computers. It was created by a team of engineers and designers under the direction of Don Estridge and William C. Lowe of the IBM Entry Systems Division in Boca Raton, Florida.
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and this is technically what we have today
