UNIVAC I (Universal Automatic Computer) waxaa la gaarsiiyey Xafiiska Tirakoobka Mareykanka bishii Juun 1951. Remington Rand ayaa ugu dambeyntii iibisay 46 mashiin oo ka badan US $ 1 milyan midkiiba ($ 9.65 milyan sida 2019). UNIVAC wuxuu ahaa kumbuyuutarkii ugu horreeyay ee "la soo saaro" kumbuyuutar. Wuxuu isticmaalay 5,200 tuubbooyin vacuum ah wuxuuna isticmaalay 125 kW oo awood ah. Kaydintiisa aasaasiga ahi waxay ahayd khadadka dib u dhaca mercury ee marin u helka taxanaha ah oo awood u leh inay kaydiyaan 1,000 erey oo ka kooban 11 lambar oo tobanle ah oo lagu daray calaamad (72-bit words). Su'aal: Kombuyuutarrada ku tiirsan tuubbooyinka vacuum-ka waxay lahaayeen kaydinta la saxeexay biraha?
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