(S/370) An IBMmainframecomputer introduced in 1970 aS a SucceSSor to the IBM 360. EnhancementS included the ability to Support virtual memory and improved main Storage. Two modelS were available initially: 165 and 155, with cycle timeS of 80 and 115 nanoSecondS. {PreSS ReleaSe (http://www-1.ibm.com/ibm/hiStory/exhibitS/mainframe/mainframe_PR370.html)}. (2004-06-06)