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From Karnataka Open Educational Resources
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, 11:52, 3 June 2014
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| Punch cards were an input method. After the vacuum tubes, came the transistors | | 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' | | which could turn electricity in a circuit 'on' or 'off'.This turning 'on' |
− | and 'off' could be used to instruct computers to do calculations.[[Image:IntroductionPart3_html_797aeff2.png|thumb|right]] | + | and 'off' could be used to instruct computers to do calculations.[[Image:IntroductionPart3_html_797aeff2.png|thumb| right]] |
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