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Which operating systems are produced by IBM, and when?

 IBM has developed several operating systems throughout its history. Here are some notable operating systems produced by IBM along with their respective timeframes:

IBM 7090/94 IBSYS (IBM System/7090/94 Input/Output Control System): Developed in the late 1950s, IBSYS was an operating system for IBM's mainframe computers, including the IBM 7090 and IBM 7094.

OS/360 (Operating System/360): Introduced in 1964, OS/360 was a groundbreaking operating system designed for IBM's System/360 mainframe computers. It marked a significant shift by providing a common software environment across various System/360 models.

OS/VS1 and OS/VS2 (Operating System/Virtual Storage): OS/VS1 (1972) and its successor OS/VS2 (1974) were operating systems for IBM's mainframe computers. OS/VS2 later evolved into Multiple Virtual Storage (MVS).

VM/CMS (Virtual Machine/Conversational Monitor System): Developed in the early 1970s, VM/CMS was an operating system that introduced virtual machine technology for IBM mainframes. It allowed multiple virtual machines to run concurrently on a single physical machine.

AIX (Advanced Interactive eXecutive): AIX is a Unix-based operating system developed by IBM. It was first introduced in 1986 for IBM's System/370 and System/390 mainframes. Over time, AIX was extended to other IBM platforms, including Power Systems.

OS/2 (Operating System/2): Jointly developed by IBM and Microsoft, OS/2 was an operating system introduced in 1987. It was designed to be a successor to MS-DOS and offered a multitasking, graphical user interface (GUI) environment. IBM continued to develop OS/2 independently after the partnership with Microsoft dissolved.

z/OS (zSeries Operating System): Introduced in 2000, z/OS is an operating system for IBM's System z mainframe computers. It is the successor to OS/390 and incorporates modern features while maintaining compatibility with previous mainframe operating systems.

IBM i (formerly known as OS/400 and i5/OS): IBM i is an integrated operating system designed for IBM's Power Systems servers. It originated as OS/400 in the late 1980s and has since evolved, providing an integrated environment for business applications.


These are some of the major operating systems developed by IBM over the years. IBM has also made contributions to open-source operating systems like Linux. It's important to note that the specific versions and updates of these operating systems have been released at different times, with ongoing development and improvements continuing today.






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