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<p>versions of IBM's <a href="page.php?w=Time_Sharing_Option">Time Sharing Option</a> (TSO) swapped users in and out of <a href="page.php?w=time-sharing">time-sharing</a> partitions.</p>

<p><big>Paged memory management</big></p>
<p>Paged allocation divides the computer's primary memory into fixed-size units called page frames, and the program's virtual <a href="page.php?w=address_space">address space</a> into <a href="page.php?w=page_%28computer_memory%29">pages</a> of the same size.  The hardware <a href="page.php?w=memory_management_unit">memory management unit</a></p><p>
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