The history of IBM mainframe operating systems is significant within the history of mainframe operating systems, because of IBM's long-standing position...

IBM mainframes are large computer systems produced by IBM since 1952. During the 1960s and 1970s, IBM dominated the computer market with the 7000 series...

is a family of IBM virtual machine operating systems used on IBM mainframes System/370, System/390, zSeries, System z and compatible systems, including...

VSEn (Virtual Storage Extended) is an operating system for IBM mainframe computers, the latest one in the DOS/360 lineage, which originated in 1965. It...

Linux on IBM Z, Linux on zSystems, or zLinux is the collective term for the Linux operating system compiled to run on IBM mainframes, especially IBM Z, zSystems...

Option (TSO) is an interactive time-sharing environment for IBM mainframe operating systems, including OS/360 MVT, OS/VS2 (SVS), MVS, OS/390, and z/OS...

transaction processing systems, the most notable aspect of ACP is that it was designed to run on most models of the IBM System/360 mainframe computer family...

of IBM's CP/CMS operating system, which went into production use in 1967. CMS is part of IBM's VM family, which runs on IBM mainframe computers. VM was...

MVS, is the most commonly used operating system on the System/370, System/390 and IBM Z IBM mainframe computers. IBM developed MVS, along with OS/VS1...

The IBM System/360 (S/360) is a family of computer systems announced by IBM on April 7, 1964, and delivered between 1965 and 1978. System/360 was the...

as IBM System/360 Operating System, is a discontinued batch processing operating system developed by IBM for their then-new System/360 mainframe computer...

platforms, including the IBM RS/6000 series and later Power and PowerPC-based systems, IBM System i, System/370 mainframes, PS/2 personal computers,...

division for its IBM 704.[specify] Most other early operating systems for IBM mainframes were also produced by customers. Early operating systems were very diverse...

IBM Z is a family name used by IBM for all of its z/Architecture mainframe computers. In July 2017, with another generation of products, the official family...

Basic Operating System/360 (BOS/360) was an early IBM System/360 operating system. BOS was one of four System/360 Operating System versions developed by...

all operating system functions can be accessed in high level languages. The application program interfaces of IBM's mainframe operating systems is defined...

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...

on the IBM System/360 Model 67. FORTRAN MAD (programming language) Timeline of operating systems History of IBM mainframe operating systems FORTRAN Monitor...

The IBM System/390 is a discontinued mainframe product family implementing ESA/390, the fifth generation of the System/360 instruction set architecture...

midrange systems, were a class of computer systems that fell in between mainframe computers and microcomputers.[failed verification] This class of machine...

the development of the Linux operating system, which arrived on IBM mainframe systems in 1999. Linux allows users to take advantage of open source software...

(TPF) is an IBM real-time operating system for mainframe computers descended from the IBM System/360 family, including zSeries and System z9. TPF delivers...

Supervisor of TSS/370 was used as the basis for a port of UNIX to the IBM mainframe. TSS/360 also inspired the development of the TSS/8 operating system. TSS/360...

Comprehensive Operating System (GCOS, /ˈdʒiːkoʊs/; originally GECOS, General Electric Comprehensive Operating Supervisor) is a family of operating systems oriented...

IBM System z9 is a line of IBM mainframe computers. The first models were available on September 16, 2005. The System z9 also marks the end of the previously...

The IBM System/360 Model 67 (S/360-67) was an important IBM mainframe model in the late 1960s. Unlike the rest of the S/360 series, it included features...

large sets of data, for example enterprise resource planning or credit card transactions. The most common operating system for mainframes is IBM's z/OS.[citation...

IBM Enterprise Systems Architecture is an instruction set architecture introduced by IBM as Enterprise Systems Architecture/370 (ESA/370) in 1988. It is...

The IBM 4300 series are mid-range systems compatible with System/370 that were sold from 1979 through 1992. They featured modest electrical and cooling...

a POS operating system based on FlexOS IBM 4690 OS, a POS operating system based on FlexOS Toshiba 4690 OS, a POS operating system based on IBM 4690 OS...