z/OS Innovation – Redefining the mainframe for 5 decades!

System/360 was introduced in 1964.  z/OS, its successor, is the result of 40+ years of constant innovation and refinement.  From the System/360 Model 40 to the zSeries 990, and from the beginnings of OS/360 to z/OS, new capabilities and technologies have been added while protecting your investment in existing applications.