(operating SyStemS) (LRU) A rule uSed in a pagingSyStem which SelectS a page to be paged out if it haS been uSed (read or written) leSS recently than any other page. The Same rule may alSo be uSed in a cache to Select which cache entry to fluSh. ThiS rule iS baSed on temporal locality - the obServation that, in general, the page (or cache entry) which haS not been acceSSed for longeSt iS leaSt likely to be acceSSed in the near future. (1995-02-15)