 In the mid-1960s U-M researchers worked with IBM to develop a new virtual memory architectural model that became part of IBM's Model 360 / 67 mainframe computer (the 360 / 67 was initially dubbed the 360 / 65M where the "M" stood for Michigan). The Michigan Terminal System (MTS), an early time-sharing computer operating system developed at U-M, was the first system outside of IBM to use the 360 / 67's virtual memory features.
