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computer history

             The computer's history was started from a very long time ago about 200 years which at the birth of the abacus that made by wooden rack holding two horizontal wire beads string on them. The beads were moved around, they were accorded to programming rules memory. The abacus made an idea for created a computer. Blaise Pascal was the one the credit for building the first digital computer. He invented the numerical wheel calculator that adds entered with dials to help his father with his duties. Pascaline also created by him which used eight movable dials to add sum up to eight figures long. In 1671, Gottfried Wilhelm von Leibniz invented a computer that had a special step system gear mechanism for the addend digit, and it was build in the 1694. When Thomas of Colmas created the first successful mechanical calculator that could add, subtract, multiply, and divide. A lot of improved desktop calculators by many inventors follow, so that the range of improvement included Accumulation of partial results; Storage and automatic reentry of past results (A memory function); Printing of result. These were the one that computer was started with. .
             Digital computer was started by John P. Eckert, John W. Manchly and their associates at Moore School of Electrical in Pennsylvania build a high-speed computer to do the job. The machine called ENIAC (Electrical Numerical Integrator and Calculator). The size of ENIAC numerical word was 10 decimal digits. It could be multiply two of these numbers at a rate of 300 per second to looking for the value of each product form multiplication table that put into memory. It used the electronic power, vacuum tube and a lot more to build the ENIAC which was commonly accepted as first successful high speed electronic digital computer. The modern stored program EDC became essential for future generation of high-speed digital computer. The stored program involves many features of computer design and function.

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