Many of the advanced features associated with the AS/400 are implemented in the operating system as opposed to the underlying hardware, which changed significantly throughout the life of the AS/400 platform. Software integration: OS/400 (now known as IBM i) is the native operating system of the AS/400 platform, and was the sole operating system supported on the original AS/400 hardware.The platform has used this capability to change the underlying processor architecture without breaking application compatibility. Technology Independence: A key concept in the AS/400 platform is Technology Independent Machine Interface (TIMI), a platform-independent instruction set architecture (ISA) that is compiled along with the native machine language instructions.The AS/400 architecture inherits several principles from System/38 System Architecture of IBM AS/400ĪS/400's architecture is defined by five architectural principles: It is one of the most secure, stable, reliable, and scalable platform for web & mobile business applications. Lower cost but more powerful than its predecessors, the AS/400 was extremely successful at launch, with an estimated 111,000 installed by the end of 1990 and the associated revenue reaching $14 billion that year. It was created in 2008 as a merger of the System p and System i product lines.Īs a member of the Midrange computers lineup from IBM, AS/400 was released in 1988, and ran the OS/400 operating system. Power Systems is a family of server computers from IBM that are based on its Power processors. IBM Power Systems Popularly Known as IBMi It was introduced in 1988, renamed eServer iSeries in 2000, and subsequently became IBM System i in 2006. It had two 16-bit processors with an operating system that supported multitasking. The S/38 had 48-bit addressing and ran the CPF (Control Program Facility) operating system. It was the first Midrange system to have an integrated relational database management system (DBMS). It was intended as a successor to both the System/3 and System/32. It was a 16-bit single-user system also known as the IBM 5320

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