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The first-generation computers were very lerge, expensive, and required huge amonts of electicity. A vacum tube consist of a glass blub and wire. The wire is use to carry data in the form of electronic singals. The ENIAC was a first-generation computer.
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The sencond-generation computers used transitors instated of vacum tubes.
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Integrated circuits mado computers faster, cheaper, and smaller than the second-feneration computers. An intefrated curquit (IC) is as small as a transitor but it can works as fast as thowands of them
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The fourth-generation computers are smaller, portable and cheaper. They use less electricity and produce less hat. The fourth-generation computers use microprocessors consist of a small silicon chip on wich thoursands of circuits are placed.
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The fifty-generation computersnare the most adunaced computers