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Personal Computer

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Personal computer

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Introduction
A computer can be defined as an electronic device with the capability of accepting raw data, process it and give out feedback, that is, it gives out information which is more useful. In the 19th century, Charles Babbage invented the first computers. They were very big and they occupied a big space. The computers were not that efficient but technological advancement led to more and more researches be conducted in order to increase the efficiency and reliability of these computers. The evolution of the personal computers took place in three major stages where each stage is said to have had a positive improvement in terms of the performance and physical size of the computers. The stages were;
First stage (1937-1946) - Clifford berry and John Atanasoff were the pioneers of first electronic digital computers. The computers had no any operating system and they used vacuum tubes for processing. They were so heavy and are believed to have produced a lot of heat. They almost weighed 30 tons and consumed a lot of power.
Second stage (1947-1962) – at this stage, everything was perfectly improved. Vacuum tubes were replaced with transistors and this made the computers more reliable. Programming languages were also invented in this stage as well as memory storage media. The computers were used commercially.
Third stage (1963- present) – it’s at this stage that the integrated circuits were invented which brought much impact on the computer industry. The computers of this generation were much reliable and powerful since they were able to handle many jobs at the same time as well as run many programs simultaneously. The Microsoft disk operating system was invented in 1980 and in the following year, international business machine (IBM) was able to personal computers which were used for office and home purposes. The

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