z/OS is a 64-bit operating system for IBM z/Architecture mainframes, introduced by
IBM in October 2000. It derives from and is the successor to OS/390, which in turn
was preceded by a string of MVS versions. Like OS/390, z/OS combines a number of formerly
separate, related products, some of which are still optional. z/OS has the attributes
of modern operating systems, but also retains much of the older functionality originated
in the 1960s and still in regular use—z/OS is designed for backward compatibility.
zOS
Product description
z/OS is a 64-bit operating system for IBM z/Architecture mainframes, introduced by
IBM in October 2000. It derives from and is the successor to OS/390, which in turn
was preceded by a string of MVS versions. Like OS/390, z/OS combines a number of formerly
separate, related products, some of which are still optional. z/OS has the attributes
of modern operating systems, but also retains much of the older functionality originated
in the 1960s and still in regular use—z/OS is designed for backward compatibility.
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Properties
Product
zOS
Vendor
IBM
Latest version
2.5.0
# Releases
18
# Versions
18
# Security affected versions (CVE)
0
Licence MIT
Commercial
Last verification date
2023-03-15
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