The Discovery of Personal Computer and Its facts



The initial electronic computers were not “personal” in any way: They were massive and immensely expensive, and they requisite a team of engineers and other authority to keep them running. One of the first and most renowned of these, the Electronic Numerical Integrator Analyzer and Computer (ENIAC), was built at the University of Pennsylvania to do ballistics calculations for the U.S. military through World War II.

ENIAC cost $500,000, weighed 30 tons and took up almost 2,000 square feet of floor space. On the outside, ENIAC was covered in a confuse of cables, hundreds of irregular lights and nearly 6,000 mechanical switches that its operators used to tell it what to do. On the inside, approximately 18,000 vacuum tubes accepted electrical signals from one part of the machine to another.
ENIAC and other early computers establish too many universities and corporations that the machines were worth the marvelous investment of money, space and manpower they command. (For example, ENIAC could solve in 30 seconds a missile-trajectory trouble that could take a team of human “computers” 12 hours to complete.) At the same time, new technologies were making it probable to build computers that were slighter and more rationalized.

But one of the most important of the inventions that paved the way for the PC uprising was the microprocessor. Before microprocessors were imaginary, computers needed a separate integrated-circuit chip for every one of their functions. (This was one reason the machines were immobile so large.) Microprocessors were the extent of a thumbnail, and they could do things the integrated-circuit chips could not: They could run the computer’s programs, memorize information and supervise data all by themselves.

The first microprocessor on the advertise was developed in 1971 by an engineer at Intel named Ted Hoff. (Intel was situated in California’s Santa Clara Valley; a place nicknamed “Silicon Valley” since of all the high-tech companies collect around the Stanford Industrial Park there.) Intel’s first microprocessor, a 1/16-by-1/8-inch chip called the 4004, had the similar calculate power as the huge ENIAC.

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