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The IBM Z family maintains full backward compatibility. In effect, current systems are the direct, lineal descendants of the System/360, announced in 1964, and the System/370 from the 1970s. Many applications written for these systems can still run unmodified on the newest IBM Z system. [3]
In April 1988, IBM introduced a System/370 workstation that had been shipping to some customers since August 1987. [13] Officially called the IBM 7437 VM/SP Technical Workstation (and later also known as the Personal System/370), it was a freestanding tower that connected to a MCA card installed in a PS/2 Model 60, 70, or 80.
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.
The primary operating systems in use on current IBM mainframes include z/OS (which followed MVS/ESA and OS/390 in the OS/360 lineage), z/VM (which followed VM/ESA and VM/XA SP in the CP-40 lineage), z/VSE (which is in the DOS/360 lineage), z/TPF (a successor of Transaction Processing Facility in the Airlines Control Program lineage), and Linux ...
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.
Gregoris Mentzas (born 1960 in Alexandroupoli, Greece) is a Greek scientist and Professor of Management Information Systems [1] at the National Technical University of Athens, Greece. He is Director of the Information Management Unit, [2] a multi-disciplinary research group at the Institute of Communication and Computer Systems. [3]
Kanellakis was born on December 3, 1953, in Athens as the only child of General Eleftherios and Mrs. Argyroula Kanellakis. A copy of Kanellakis's Ph.D. thesis in a library at MIT. In 1976, he received a diploma in electrical engineering from the National Technical University of Athens, with a thesis supervised by Emmanuel Protonotarios. [1]
Linux on IBM Z originated as two separate efforts to port Linux to IBM's System/390 servers. The first effort, the "Bigfoot" project, developed by Linas Vepstas in late 1998 through early 1999, was an independent distribution and has since been abandoned. [1]