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swap

   memory to a slow-access memory (`swap out'), or vice versa
   (`swap in').  Often refers specifically to the use of disks as
   `virtual memory'.  As pieces of data or program are needed, they
   are swapped into core for processing; when they are no longer
   needed they may be swapped out again.  2. The jargon use of these
   terms analogizes people's short-term memories with core.  Cramming
   for an exam might be spoken of as swapping in.  If you temporarily
   forget someone's name, but then remember it, your excuse is that it
   was swapped out.  To `keep something swapped in' means to keep it
   fresh in your memory: "I reread the TECO manual every few months
   to keep it swapped in."  If someone interrupts you just as you got
   a good idea, you might say "Wait a moment while I swap this
   out", implying that a piece of paper is your extra-somatic
   memory and that if you don't swap the idea out by writing it down it
   will get overwritten and lost as you talk.  Compare page in,
   page out.