It was originally released in 1988 as OS/400, as the sole operating system of the IBM AS/400 line of systems. It was renamed to i5/OS in 2004, before being renamed a second time to IBM i in 2008. [8][9] It is an evolution of the System/38 CPF operating system, [5] with compatibility layers for System/36 SSP and AIX applications. [5]

IBM i is a fully integrated operating system, meaning the database, middleware, security, runtime, and hypervisor are all integrated into the stack and licensed as one. This integration helps clients lower TCO, simplify systems management, and do more with fewer resources.

The IBM AS/400 (Application System/400) is a family of midrange computers from IBM announced in June 1988 and released in August 1988. It was the successor to the System/36 and System/38 platforms, and ran the OS/400 operating system.

2012年1月20日 · Select from a list of models to access information about your specific IBM® System i®, System i5® , IBM eServer™ i5, iSeries, or AS/400 model.

2012年5月12日 · IBM i、i5/OS和OS/400是IBM用于其商业计算机系列的操作系统，经历了从AS/400到Power Systems的演进。 OS/400作为AS/400硬件设计的一部分，具有多实例并发运行的能力，支持Java、Windows应用程序和UNIX应用的移植。

2012年12月23日 · The IBM® Systems Hardware Information Center contains information about the IBM System i models, which include the IBM POWER6™, POWER5™, and POWER5+™ technologies. The product families covered are IBM System i, IBM System i5, IBM eServer i5, iSeries, and AS/400 models.

When you rely on your IT infrastructure to support business-critical operations, you want to know that your systems are going to be available every time you need them. With confidence-inspiring availability and secure, scalable archi-tecture, running i5/OS® on your System i5 installation can help you do more and worry less.

This chapter provides the summary charts, diagrams, and identifies the processor features that are associated with each IBM System i5 and IBM eServer i5 Model 520, 550, 570, and 595.

IBM i （アイ・ビー・エム アイ）は、IBM Powerサーバーで稼働する オペレーティングシステム である。 1988年にIBMの ミッドレンジコンピュータ 向けに開発されたOSであり、IBM AS/400およびIBM eServer iSeries搭載時は OS/400 、IBM System i 搭載時は i5/OS と呼ばれてい …

2007年2月28日 · This IBM Redbooks publication provides a technical overview of IBM System i family hardware and i5/OS-based software at Version 5 Release 4 level. It is intend for those already familiar with System i and i5/OS who need a broad perspective of what is new with V5R4 either to consider upgrading to V5R4 or to take full advantage of V5R4 capabilities.