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From Karnataka Open Educational Resources
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, 10:55, 3 June 2014
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| == '''History of computers''' == | | == '''History of computers''' == |
− | | + | [[Image:Introduction-Part3_html_m21bc9239.png|left]]<br>[[Image:Introduction-Part3_html_797aeff2.png|right]]<br> |
| + | Did you know, the first computer was as big as your classroom! 60 years ago, |
| + | computers were very big, costly and used lot of electricity. The |
| + | processors of the first computers were made using something called |
| + | 'vacuum tubes' - which used tubes in which |
| + | electrons were moving. Punch cards were an input method. After the |
| + | vacuum tubes, came the transistors which could turn electricity in a |
| + | circuit 'on' or 'off'. This turning 'on' and 'off' could be used to |
| + | instruct computers to do calculations. |
| |} | | |} |
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