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<a accesskey="3" href="page.php?w=memory-mapped_file&amp;p=2">3.Next</a>
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<p>A <b>memory-mapped file</b> is a segment of <a href="page.php?w=virtual_memory">virtual memory</a> that has been assigned a direct byte-for-byte correlation with some portion of a file or file-like resource.  This resource is typically a file that is physically present on disk, but can also be a device, <a href="page.php?w=shared_memory">shared memory</a> object, or other resource that an <a href="page.php?w=operating_system">operating system</a> can reference through a <a href="page.php?w=file_descriptor">file descriptor</a>.  Once present,</p><p>
<a accesskey="3" href="page.php?w=memory-mapped_file&amp;p=2">3.Next</a>
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