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<a accesskey="3" href="page.php?w=extension_conflict&amp;p=2">3.Next</a>
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<p><b>Extension conflicts</b> were sometimes a common nuisance on <a href="page.php?w=Apple_Macintosh">Apple Macintosh</a> computers running the <a href="page.php?w=classic_Mac_OS">classic Mac OS</a>, especially <a href="page.php?w=System_7_%28Macintosh%29">System 7</a>. <a href="page.php?w=Extension_%28Mac_OS%29">Extension</a>s were bundles of code that extended the <a href="page.php?w=operating_system">operating system</a>'s capabilities by directly patching <a href="page.php?w=System_call">OS calls</a>, thus receiving control instead of the operating</p><p>
<a accesskey="3" href="page.php?w=extension_conflict&amp;p=2">3.Next</a>
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