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<a accesskey="3" href="page.php?w=x87&amp;p=2">3.Next</a>
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<p><b>x87</b> is a <a href="page.php?w=floating-point">floating-point</a>-related subset of the <a href="page.php?w=x86_architecture">x86 architecture</a> <a href="page.php?w=instruction_set">instruction set</a>. It originated as an extension of the <a href="page.php?w=8086">8086</a> instruction set in the form of optional floating-point <a href="page.php?w=coprocessor">coprocessors</a> (<a href="page.php?w=Floating-point_unit">FPU</a>) that work in tandem with corresponding x86 CPUs. These microchips have names ending in "87". This is also known</p><p>
<a accesskey="3" href="page.php?w=x87&amp;p=2">3.Next</a>
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