As400 May 2026

The (Application System/400), introduced in 1988, is a renowned family of midrange computers designed for business applications. While the original hardware is no longer in production, its core architecture lives on in today’s IBM Power Systems running the IBM i operating system. Evolution and Rebranding

: This layer separates applications from the underlying hardware, allowing companies to upgrade to new processors (like Power10) without modifying their software.

: Unlike other servers, the Db2 for i relational database is built directly into the operating system. The (Application System/400), introduced in 1988, is a

The AS/400's longevity is largely due to its unique, forward-thinking architecture:

: AS/400 launched as the successor to System/36 and System/38. 2000 : Rebranded as iSeries . 2006 : Renamed System i . : Unlike other servers, the Db2 for i

: This architecture treats all RAM and disk storage as one massive virtual address space, simplifying data management. Why It’s Still Relevant in 2026

Over worldwide—including 16,000 banks—still rely on this platform for mission-critical workloads. 2006 : Renamed System i

The platform has undergone several name changes, often causing confusion for those outside the industry: