System/370 definition hardware, IBM
(S/370) An IBM mainframe computer
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).