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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.
The RPG programming language originally was created by IBM for their 1401 systems. IBM later produced implementations for the 7070/72/74 [4] [5] and System/360; [6] RPG II became the primary programming language for their midrange computer product line, (the System/3, System/32, System/34, System/38, System/36 and AS/400).
[10] [13] As of 2020, the IBM midrange systems held a 36.3% market share, especially prevalent in critical industries such as banking, retail, healthcare, manufacturing, logistics and retail. Most enterprises depend on the AS400/iSeries/IBMi in these sectors, with most or all of their workload operating seamlessly on this system. [15]
CGIDEV2 was developed by Mel Rothman while he was with IBM Rochester. It was released to the public in 1999. The product was maintained and promoted by Mr. Rothman and Dr. Giovanni B. Perotti [2] of IBM Italy, who have added enhancements, documentation and code samples to the package.
IBM i Access Client Solutions is a Java-based client that runs on Linux, macOS and Windows to provide 5250 emulation. IBM i Access for Web/Mobile provides web-based 5250 emulation. In addition, IBM provides a web-based management console and performance analysis product named IBM Navigator for i. [67]
Operational Control Language (OCL) is the control language of the IBM System/3, System/32, System/34 and System/36 minicomputer family. It is supported on IBM i's System/36 Environment for backwards compatibility purposes.
In the System/36 implementation of RPG II, there are eight different specification (spec) types, that is a fixed-format line of text, 80 characters (bytes) in length, derived from the original use of punched card input for earlier IBM systems, like the System/3.
As it is an assembly language, BAL uses the native instruction set of the IBM mainframe architecture on which it runs, System/360, just as the successors to BAL use the native instruction sets of the IBM mainframe architectures on which they run, including System/360, System/370, System/370-XA, ESA/370, ESA/390, and z/Architecture.