#Computer_Fundamentals

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[catsandlasers1-blog]

First generation computers used vacuum tubes as the basic components for memory  and circuitry processing. The tubes generated a lot of heat and needed to be replaced often, which is why these computers were only afforded by large organizations. 

[nehaarticles]

Input devises 

The input devices are those that fulfill the function of entering or providing data and control signals to the central processing unit of a system.