In 1960, IBM announced the IBM 1410 data processing system.
The IBM 1410 contained large volume storage facilities and fast input/output units. According to IBM’s website, initial orders for the 1410 exceeded 3,500, making it the most widely-accepted data processing machine ever produced.
Learn more at http://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP1410.html.