IBM AS/400 Software

IBM i, iSeries, and AS/400 Software Guide

What IBM AS/400 software includes, which programming languages shaped the platform, and how security, automation, data protection, and replication tools fit into IBM i operations today.

IBM introduced the AS/400 in 1988 as an integrated business computing platform built around hardware, OS/400, an integrated database, and business application reliability. Over time, the platform evolved through iSeries, System i, and today's IBM i on Power Systems, but the core appeal stayed the same: tightly integrated software, strong security, stable operations, and long-term application continuity.

AS/400 software is not one