Over worldwide—including 16,000 banks—still rely on this platform for mission-critical workloads.
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
: Hardware consolidated into IBM Power Systems , with the operating system becoming IBM i . Core Architectural Features Evolution and Rebranding : Hardware consolidated into IBM
: 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 platform has undergone several name changes, often
The platform has undergone several name changes, often causing confusion for those outside the industry:
: AS/400 launched as the successor to System/36 and System/38. 2000 : Rebranded as iSeries . 2006 : Renamed System i . : Everything on the system—files
: Everything on the system—files, programs, and devices—is treated as an object , which significantly enhances security and stability.