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<p>A <b>vacuum-tube computer</b>, now termed a <b>first-generation computer</b>, is a computer that uses <a href="page.php?w=vacuum_tube">vacuum tube</a>s for logic circuitry. While the history of mechanical aids to computation goes back <a href="page.php?w=Difference_engine">centuries</a>, if not <a href="page.php?w=Antikythera_Mechanism">millennia</a>, the history of vacuum tube computers is confined to the middle of the 20th century. <a href="page.php?w=Lee_De_Forest">Lee De Forest</a> invented the triode in 1906. The first example of using vacuum</p><p>
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