What is the AS400 Computer?
The AS400 Computer, also known as the IBM AS/400, is a midrange server introduced by IBM in 1988. It was designed to provide businesses with a powerful, scalable, and integrated system capable of running mission-critical applications. The AS400 combines a hardware platform with its native operating system (OS/400, now known as IBM i) and a built-in database, offering a reliable solution for managing complex enterprise workloads like financial transactions, inventory management, and ERP systems.
One of its key strengths is backward compatibility, allowing companies to run both older legacy applications and modern software on the same system. Over time, the AS400 has evolved into what is now called the IBM iSeries or simply IBM i, while retaining its core architecture that prioritizes security, stability, and ease of use. Its unique object-based system and single-level storage continue to make it a popular choice for businesses requiring high availability and robust performance in their IT infrastructure.