AS400 and IBM i Glossary

IBM's mid-range business computer platform introduced in 1988. The original name that persists as colloquial shorthand for IBM i and IBM Power Systems worldwide.

Commercial Processing Workload. IBM's benchmark metric for measuring the relative processing performance of IBM i systems. Used to compare AS400/IBM i hardware generations and models.

The integrated relational database built into IBM i (AS400). DB2 for i is not a separate product ... it is part of the OS. One of the AS400 platform's defining architectural advantages.

The text-based character interface used to interact with AS400 and IBM i systems. Named for the green monochrome display terminals originally used. A key modernization target.

The current official name for the operating system that runs on IBM Power Systems. Successor to OS/400 and i5/OS. The OS lineage of the AS400 platform.

The IBM server hardware platform that runs IBM i (and AIX and Linux). The hardware successor to the AS400, iSeries, and System i platforms.

The brand name IBM used for the AS400 hardware platform from 2000 to 2006. Replaced by System i in 2006 and IBM Power Systems in 2008.

The original operating system for the AS400 platform, released in 1988. Renamed to i5/OS in 2004 and IBM i in 2008. The OS lineage that all IBM i releases trace back to.

The current generation of IBM Power Systems hardware, released in 2024. Runs IBM i 7.3, 7.4, and 7.5. The latest hardware for AS400/IBM i environments.

IBM's primary programming language for AS400 and IBM i. Report Program Generator, now evolved into a modern structured language (ILE RPG / RPGLE) still in active use.

IBM's brand name for the AS400/iSeries platform from 2006 to 2008. Part of IBM's unified Systems branding. Replaced by IBM Power Systems.