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An IBM System Z10 mainframe computer on which z/OS can run. z/OS is a 64-bit operating system for IBM z/Architecture mainframes, introduced by IBM in October 2000. [2] It derives from and is the successor to OS/390, which in turn was preceded by a string of MVS versions.
The z Systems z13s (2965 series) was introduced on February 17, 2016 [21] The z13 and z13s introduce a new vector architecture and are the last z Systems servers to support running an operating system in ESA/390 architecture mode. [22]
The IBM z13 is the last z Systems server to support running an operating system in ESA/390 architecture mode. [2] However, all 24-bit and 31-bit problem-state application programs originally written to run on the ESA/390 architecture will be unaffected by this change.
z/VM is the current version in IBM's VM family of virtual machine operating systems. First released in October 2000, [ 2 ] z/VM remains in active use and development as of 2024 [update] . [ 3 ]
All modern IBM mainframe operating systems except z/TPF are descendants of those included in the "System/370 Advanced Functions" announcement – z/TPF is a descendant of ACP, the system which IBM initially developed to support high-volume airline reservations applications.
An example of such a system is the HITAC S-3800, which was instruction-set compatible with IBM System/370 mainframes, and could run the Hitachi VOS3 operating system (a fork of IBM MVS). [40] The S-3800 therefore can be seen as being both simultaneously a supercomputer and also an IBM-compatible mainframe.
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IBM System z10 is a line of IBM mainframes. The z10 Enterprise Class (EC) was announced on February 26, 2008. On October 21, 2008, IBM announced the z10 Business Class (BC), a scaled-down version of the z10 EC. The System z10 represents the first model family powered by the z10 quad core processing engine.