IBM i (OS/400) The Database Operating System
Summary
An in-depth look at IBM i (formerly AS/400), highlighting its architecture where the database Db2 for i is embedded in the kernel, the Single Level Storage model, and the object-based design. The article explains how IBM i combines OS and database, uses TIMI and SLIC, manages storage with ASP pools, and provides HA, integrated file system, PASE, and a traditional 5250 interface. It emphasizes that the platform is enterprise-focused, with strong security, strict access controls, and a unique lifecycle and maintenance model.