NUzalelwe eJefferson City, eTennessee ngoMashi 2, 1957, uMark Dean uthole ukuthi impumelelo yayisebenza emithanjeni yegazi lakhe. Umkhulu wakhe wayenguthishanhloko futhi ubaba wakhe esebenza njengomphathi weDam Tennessee Valley Authority. Ingane ekhanyayo nenomdlandla, wayevame ukubekezelela imibuzo evela kofunda nabo esikoleni samabanga aphansi, ebuza ukuthi ngabe wayemnyama ngempela yini ngoba abaNsundu abavamile akufanele ngabe bahlakaniphe kangako. UMark wayengumdlali owaziwayo wesikole samabanga aphakeme futhi wayengumfundi oqondile. Impumelelo yakhe yaqhubeka ekolishi, njengoba waqeda okokuqala ekilasini lakhe nge-BS kwi-Biology ku-Electrical Engineering evela e-University of Tennessee ngo-1979.
Ngo-1980 uDean wamenywa ukuba ajoyine i-IBM njengonjiniyela. Ngaphandle kwesikhundla sakhe esisha, uqhubekile nemfundo yakhe wathola iziqu ze-master kwezobunjiniyela kagesi eFlorida Atlantic University ngo-1982. Njengonjiniyela we-IBM, akuthathanga sikhathi kwaba negalelo elikhulu, wakhonza konjiniyela omkhulu Okweqembu elithuthukise i-IBM PC / AT, ikhompyutha yangempela yasekhaya / yehhovisi. Nge uzakwabo Dennis Moeller, wahlakulela Bus lwekhompiyutha (ISA) izinhlelo, i-elementi ukuthi avunyelwe kumadivayisi amaningi ezifana modems futhi amaphrinta ixhunywe PC, okwenza PC i ezingabizi, ichopho elula of the ikhaya noma ihhovisi lebhizinisi elincane. U-Dean uzoba ne-patent ayisishiyagalolunye yesishiyagalolunye eyakhelwe kuwo wonke ama-PC. UDean ulandelwe ngamamodeli wePS / 2 70 noma 80, kanye ne-adaptha yemidwebo yombala (evumela ukuboniswa kombala ku-PC).
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