Definition

z/OS

z/OS is the computer operating system for IBM's zSeries 900 (z900) line of large (mainframe) servers. z/OS is a renamed and upgraded version of OS/390, which in turn evolved from the MVS operating system. IBM's renamed servers and operating systems reflect a strategy to realign its products more closely with the Internet and its own e-business initiatives.

z/OS is described as an extremely scalable and secure high-performance operating system based on the 64-bit z/Architecture. Like its predecessor, OS/390, z/OS lays claim to being highly reliable for running mission-critical applications. The operating system supports Web- and Java-based applications.

This was last updated in October 2008

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çikolata yemeyi pek sewmem ama döer ve koladan vazgeçemem
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Actually, it's not "the" operating system for zSeries hardware, it's "an" operating system. There are others - TPF, Linux, etc.
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