AS400iSeries

The AS/400, now known as IBM iSeries or IBM i, is a midrange computer system developed and marketed by IBM. It was first introduced in 1988 as the Application System/400, replacing the System/36 and System/38 families of computers. The AS/400 was designed to be a versatile platform for businesses of all sizes, offering a complete integrated hardware and software solution.

A key feature of the AS/400 is its integrated database, which is part of the operating system, eliminating the need for separate database management systems in many cases. The system also utilizes object-based technology, where all system resources like programs, files, and users are treated as objects. This design contributes to its stability and security.

Over the years, the AS/400 has evolved significantly. It transitioned to the iSeries name in 2000 and was rebranded again as IBM i in 2008. Despite the name changes, the core architecture has been maintained, allowing for backward compatibility with older applications. This continuity has been a major selling point for businesses that have invested heavily in AS/400 software over decades.

The platform is known for its reliability, security, and scalability. It continues to be used by many businesses, particularly in industries such as finance, manufacturing, and retail, for mission-critical applications. IBM i supports a wide range of programming languages, including COBOL, RPG, Java, and .NET, ensuring its relevance in modern IT environments.