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Page (computer memory)
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<p> A page, memory page, or virtual page is a fixed-length contiguous block of <a href="/facts/Virtual_memory/Lw2GemF5">virtual memory</a>, described by a single entry in a <a href="/facts/Page_table/0IBU5cwg">page table</a>. It is the smallest unit of data for memory management in an operating system that uses virtual memory. Similarly, a page frame is the smallest fixed-length contiguous block of <a href="/facts/Physical_memory/wPHKFpdx">physical memory</a> into which memory pages are mapped by the operating system. </p><p>A transfer of pages between main memory and an auxiliary store, such as a <a href="/facts/Hard_disk_drive/kekLSGSE">hard disk drive</a>, is referred to as <a href="/facts/Paging/KR889x5k">paging</a> or swapping. </p>