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Management Information Systems
Notes 5.2.2 General-Purpose Mainframe and Minicomputer (Era 1959 to Present)
The first commercial all-electronic vacuum tube computers appeared in the early 1950s with the
introduction of the UNIVAC computers and the IBM 700 Series. Not until 1959 with the introduction
of the IBM 1401 and 7090 transistorized machines did widespread commercial use of mainframe
computers begin in earnest. In 1965, the general-purpose commercial mainframe computer
truly came into its own with the introduction of the IBM 360 series. The 360 was the first
commercial computer with a powerful operating system that could provide time sharing,
multitasking, and virtual memory in more advanced models.
Figure 5.1: Eras in IT Infrastructure Evolution
Stages in IT Infrastructure Evolution
76 LOVELY PROFESSIONAL UNIVERSITY
