IBM i

IBM i is an operating system (previously referred to as i5/OS or OS/400) that runs on IBM's Power Systems hardware (previously called iSeries) and IBM's PureSystems, and it is the primary thing that makes the platform so unique. The name IBM i replaced the name i5/OS as of 2 April 2008, and applies to version 6.1 and above. See OS/400 101 Introduction.

IBM i provides a large number of "Open" resources common on other systems, in addition to a few IBM-only 400 languages and database tools. The i stands for integration of these various technologies, including a very robust variation of the DB2 relational database which is woven into the OS. Another such technology is a Posix compatible environment and shell, the "Q-shell", qsh.

IBM has created a logo for IBM i:

Generally, IBM i has traditionally accessed using a 5250 emulator.

• Java
• Apache Web server
• Posix compliant API's accessible from many programming languages.
• PHP

Originally OS/400, meaning Operating System 400, was for the AS/400, meaning Application System 400.

Then IBM came out with variants and re-inventing renaming ... see Names ... such as the AS/36 Advanced System 36, which offered an advanced version of S/36 OS SSP running on the AS/36 one of two flavors:

• M36 Machine 36, which was later discontinued, and
• S36 Environment 36 on the 400.

See also

• History of OS/400

Vendor Statements of Support

• Vendor Statements of Support

External links

• IBM's wiki IBM i
• Market size estimating at IT Jungle
• Wikipedia:OS/400
• OS/400 Release Life Cycle table
• i5/OS and OS/400 Release Upgrade and Support table
• IBM System to IBM i maps
• System i/i5/iSeries/AS/400 RISC Model to OS Level Mapping