Source : Free On-Line Dictionary of Computing

prepaging
     
         (Or "working set model") A technique whereby
        the {operating system} in a {paging} {virtual memory}
        {multitasking} environment loads all pages of a process's
        {working set} into memory before the process is restarted.
     
        Under {demand paging} a process accesses its working set by
        {page faults} every time it is restarted.  Under prepaging the
        system remembers the pages in each process's working set and
        loads them into physical memory before restarting the process.
        Prepaging reduces the {page fault} rate of reloaded processes
        and hence generally improves CPU efficiency.
     
        ["Modern Operating Systems", Andrew S. Tanenbaum,
        pub. Prentice Hall, Inc.  1992].
     
        (1998-04-23)