As400

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

Over worldwide—including 16,000 banks—still rely on this platform for mission-critical workloads. : This layer separates applications from the underlying

: Hardware consolidated into IBM Power Systems , with the operating system becoming IBM i . Core Architectural Features : This layer separates applications from the underlying

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

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

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