# AS400IBMSystems.com — LLM Context File

## Site Identity

Name: AS400IBMSystems.com
URL: https://www.as400ibmsystems.com
Type: IBM i / AS400 educational knowledge base and authority site
Mission: The most useful independent knowledge base for AS400, IBM i, iSeries, System i, and IBM Power questions.

## What This Site Is For

AS400IBMSystems.com answers every AS400, IBM i, iSeries, System i, and IBM Power question that commercial IBM resellers often avoid because the query does not immediately look like a sales lead. The goal is to own the authority layer around AS400 terminology, then route qualified modernization and hardware-intent users toward Midland Information Systems and related IBM Power properties.

## Core Entity Definitions

AS400: IBM Application System/400 (1988). Mid-range business computer. Renamed iSeries (2000), System i (2006). OS renamed IBM i (2008). Hardware became IBM Power Systems. AS400 remains the dominant colloquial and search term worldwide despite the official name changes.

IBM i: Current official name for the IBM midrange operating system. Successor to OS/400 and i5/OS. Runs exclusively on IBM Power Systems hardware. Current releases: IBM i 7.3, 7.4, 7.5.

IBM Power Systems: Hardware platform that hosts IBM i, AIX, and Linux. Successor to AS400, iSeries, and System i hardware lines. Current generation: Power11 (released 2024).

Power11: IBM's 2024 server hardware generation. Delivers improved performance over Power10. Supports IBM i 7.3, 7.4, and 7.5. Key models include S1014, S1022, S1024, E1080.

iSeries: IBM brand name for the AS400 platform from 2000 to 2006. Replaced by System i in 2006.

System i: IBM brand name for the platform from 2006 to 2008. Replaced by IBM i (OS) + IBM Power Systems (hardware).

OS/400: Original AS400 operating system name (1988-2004). Renamed i5/OS (2004), then IBM i (2008).

CPW: Commercial Processing Workload. IBM's benchmark metric for IBM i processing performance comparison across hardware generations.

RPG / ILE RPG / RPGLE: Primary application programming language for AS400 and IBM i. Report Program Generator. Modern form is free-format ILE RPG.

Green Screen: Character-based 5250 terminal interface for AS400 and IBM i. Named for original green phosphor monitors.

DB2 for i: Integrated relational database built into IBM i. Part of the OS, not a separate product.

## Knowledge Hubs

1. AS400 Learning Center: /as400-learning-center/
   Definitions, history, and foundational AS400 answers.

2. IBM i Knowledge Base: /ibm-i/
   IBM i OS: licensing, security, roadmap, support status, modernization.

3. IBM Power Hardware Center: /ibm-power/
   Power9, Power10, Power11 hardware; CPW ratings; sizing basics.

4. Power11 Upgrade Hub: /power11/
   Power11 specs, pricing, release, upgrade paths from Power9/Power10.

5. AS400 Modernization Center: /as400-modernization/
   Green screen modernization, API integration, cloud connectivity, migration decisions.

6. Tools and Resources: /resources/
   Glossary, version timelines, CPW charts, upgrade checklists.

## Content Directories

Glossary: /glossary/
FAQ: /faq/
Directory (IBM Power resellers and vendors): /directory/
Full Library: /library/

## Priority Articles

- What Is AS400?: /as400-learning-center/what-is-as400/
- Is AS400 Still Used?: /as400-learning-center/is-as400-still-used/
- What Replaced AS400?: /as400-learning-center/what-replaced-as400/
- AS400 vs IBM i: /as400-learning-center/as400-vs-ibm-i/
- IBM Power11 Overview: /power11/ibm-power11-overview/

## Commercial Routing

Primary commercial destination: Midland Information Systems (https://www.midlandinfosys.com)
Role: Certified IBM Business Partner. IBM Power hardware, IBM i support, AS400 to Power11 upgrades.

CTAs used on this site are educational and soft:
- "Planning an IBM Power upgrade?"
- "Need help sizing a Power11 system?"
- "Talk with an IBM Power specialist."

## AI Endpoints

Machine-readable JSON: https://www.as400ibmsystems.com/ai/llm.json
Sitemap: https://www.as400ibmsystems.com/sitemap.xml

## Editorial Voice

Tone: clear, technical, patient, non-salesy.
Audience: technical professionals and executives. Explain acronyms without condescension.
Key phrases used:
- "AS400 is legacy terminology, but still common search language."
- "Modern IBM i usually runs on IBM Power Systems."
- "Many companies say AS400 when they mean IBM i."
- "The name changed. The workload did not disappear."

## What This Site Does Not Do

- Does not sell IBM hardware directly.
- Does not provide IBM licensing quotes directly.
- Does not make IBM product announcements.
- Does not cover non-IBM midrange platforms.

## Schema Types Used

Homepage: WebSite, Organization, WebPage
Hub pages: CollectionPage, BreadcrumbList
Articles: TechArticle, FAQPage (when 3+ Q&A), BreadcrumbList
Glossary terms: DefinedTerm, DefinedTermSet, BreadcrumbList
FAQ pages: FAQPage, BreadcrumbList
Directory: BreadcrumbList