What Is an AS400? IBM's Midrange Computing Platform Explained
The AS400, now known as IBM i on Power, is IBM's midrange computing platform first introduced in 1988. It remains in active production at thousands of organizations worldwide.
IBM Power & AS400 FAQ
Frequently asked questions about IBM Power Systems, AS400, iSeries, IBM i, upgrades, migrations, and modernization.
IBM Power Systems Buyer Guide for AS400 and IBM i Teams
A buyer-focused IBM Power Systems guide for AS400 and IBM i teams comparing current Power 11, Power 10, refurbished systems, AIX capacity, storage, maintenance, and migration paths.
IBM Power Server Models Guide for IBM i and AIX Buyers
A model-focused guide for buyers comparing IBM Power servers, including Power 11, Power 10, refurbished Power 9, IBM i compatibility, AIX capacity, and support planning.
IBM Machine Types and Feature Codes Guide for Power Buyers
How IBM machine types, model numbers, and feature codes shape IBM Power quotes, replacement parts, maintenance coverage, and AS400 upgrade planning.
IBM P Series and AIX Server Guide for Power Systems Buyers
A practical guide for buyers searching IBM P Series, AIX servers, and IBM Power Systems hardware for UNIX workloads, migrations, and reseller quotes.
iSeries and IBM i Server Refresh Guide
A refresh planning guide for iSeries and IBM i teams evaluating current IBM Power Systems, support risk, application compatibility, backup, and migration timing.
AS400 Power Requirements Planning Guide
A facilities and hardware planning guide for AS400 and IBM Power power requirements, UPS sizing, circuits, redundancy, rack planning, and replacement power supplies.
IBM Power 11 vs Power 10: What Changed for IBM i Shops
A direct comparison of IBM Power11 and Power10 for organizations running AS400 and IBM i workloads, covering performance, AI readiness, security, and energy efficiency.
IBM FlashSystem Storage Upgrade Guide: When to Move to FCM3 or FCM4
How to decide whether an AS400/IBM i storage refresh should stay on internal DASD, or add external IBM FlashSystem storage, and which FlashCore Module generation actually fits the upgrade.