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The Abacus used a system of sliding beads in a rack for for addition and subtraction.
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The French philosopher and mathmatician named Balise Pascal invented this calculating device which had 8 dial wheels and could calculate figures up to eight figures long.
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This invention was a step up from the pascaline as instead of adding and subtracting only it now multiplies and divides.
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A French weaver who discovered that the weaving instructions for his looms could be stored on cards with hoels punched in them. The idea or storing information bu punching holes on a card proved to be of great importance in the later development of computers.
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Charles Babbage designed these two calculating machines. The "Difference Engine" could perform complex operations such as squaring numbers automatically. The "Analytical Engine" design included input devices, data storage, a control unit that allowed processing instructions in any sequence , and output devices.
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The Mark I is the world's first computer-like machine. It was built jointly by IBM and Harvard Universtiy under the leadership of Howard Aiken. Punched cards were used to feed data into the machine.
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The rules were given by John von Neuman. His design included components such as arithmetic logic unit, a control unit, memory, and input/ouput devices. This design makes it possible to store the programming instructions and the data in the same memory space.
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The invention of transistors reesulted in smaller, faster, more reliable, and more engery-efficiant computers. These were later replaced with tiny intergrated circuit, or "chips". Chips are smaller and cheaper than transistors and can contain thousands of circuits on a single chip.
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An entire CPU on a single chip.
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Stephen Wozniak and Steven Jobs designed and built the first Apple computer in their garage.
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Clones of the IBM PC made the personal computer more affordable.
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IBM introduced their own personal computer.
