As400

: AS/400 launched as the successor to System/36 and System/38. 2000 : Rebranded as iSeries . 2006 : Renamed System i .

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

The platform has undergone several name changes, often causing confusion for those outside the industry: : AS/400 launched as the successor to System/36

: Everything on the system—files, programs, and devices—is treated as an object , which significantly enhances security and stability.

: 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

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

: Hardware consolidated into IBM Power Systems , with the operating system becoming IBM i . Core Architectural Features : Unlike other servers, the Db2 for i

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