31![David Allison, Smithsonian Institution Using the Computer: David Allison, Smithsonian Institution Using the Computer:](https://www.pdfsearch.io/img/585c5bedce070365f7f70bc0abb85ee3.jpg) | Add to Reading ListSource URL: americanhistory.si.eduLanguage: English - Date: 2000-02-22 14:28:44
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32![](https://www.pdfsearch.io/img/ddb47c2d9b569b22945e3f8a9729071e.jpg) | Add to Reading ListSource URL: ecet.ecs.uni-ruse.bgLanguage: English - Date: 2003-07-10 07:12:46
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33![](https://www.pdfsearch.io/img/ca98ead4f1ec7401c5af4b158ee69a4d.jpg) | Add to Reading ListSource URL: ecet.ecs.ru.acad.bgLanguage: English - Date: 2003-07-10 07:12:46
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34![](https://www.pdfsearch.io/img/6c0d12c57c0c486b3d0b84bf9d31224c.jpg) | Add to Reading ListSource URL: invention.smithsonian.orgLanguage: English - Date: 2007-10-16 13:59:44
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35![](https://www.pdfsearch.io/img/f44afb8ef12a9641531692ec9ec365eb.jpg) | Add to Reading ListSource URL: invention.smithsonian.orgLanguage: English - Date: 2006-08-24 13:41:33
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