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.

With an eye toward succeeding the popular System/36 and System/38 platforms, IBM developed the AS/400 line around two priorities: high performance and ease of use.

Feb 16, 2022 · This article about AS400 provides an overview of the history of the platform, its characteristics, who still uses it, why companies still use it, its pros and cons, integrated web services, top facts about IBM AS/400, new uses of the iSeries AS/400, and answers to frequently asked questions.

IBM i (the i standing for integrated) [6] is an operating system developed by IBM for IBM Power Systems. [7] It was originally released in 1988 as OS/400 , as the sole operating system of the IBM AS/400 line of systems.

Feb 24, 2024 · What is IBM AS400? The AS400, also known as IBM iSeries and now IBM i, is a midrange computer system developed by IBM. Launched in 1988, AS400 was designed for businesses requiring a reliable, secure, and scalable computing platform.

Aug 28, 2024 · The AS400 (Now IBM i) remains a key tool for managing critical applications in fields like healthcare, financial services, retail and manufacturing. The AS400 uses a special technology called Technology Independent Machine Interface (TIMI).

Aug 14, 2024 · When IBM released the Application System/400 (-400) in 1988, it came with both the AS/400 hardware and OS/400 software and a range of core functions. To this day, it’s a highly secure, stable, reliable, and scalable mid-range computer system that provides a …

In 2000 IBM changed the AS/400 name to “eServer iSeries” and the OS to “i5/OS”. And again in 2006, as part of IBM’s Systems branding initiative, the hardware was renamed to “System i” and the OS to “IBM i”.

Feb 4, 2025 · IBM AS/400 was transitioned to IBM eServer iSeries, where the ‘i’ denoted integrated. The iSeries used the OS/400 operating system to support existing AS/400 applications. The AS400 to iSeries transition mainly comprised system capability enhancement to run emerging e-business applications.

Mar 6, 2024 · AS 400 stands for Application System 400, a midrange IBM server computing platform for business computing. AS/400 uses 64-bit RISC technology, supports Systems Network Architecture (SNA) and runs the OS/400 operating system.