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<p>The <a href="page.php?w=computer">computer</a> used in the spacecraft that first carried humans to the <a href="page.php?w=moon">moon</a>, the <a href="page.php?w=Apollo_Guidance_Computer">Apollo Guidance Computer</a>, was constructed entirely using NOR gates with three inputs.</p>

<p><big>Definition</big></p>
<p>The <b>NOR operation</b> is a <a href="page.php?w=logical_operation">logical operation</a> on two <a href="page.php?w=logical_value">logical value</a>s, typically the values of two <a href="page.php?w=proposition">proposition</a>s, that produces</p><p>
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<a accesskey="3" href="page.php?w=logical_NOR&amp;p=4">3.Next</a>
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