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Title: IBM i  
Author: World Heritage Encyclopedia
Language: English
Subject: IBM System i, Logical partition, Accelerator (software), IBM RPG, Rocket Software
Collection: 1988 Software, As/400, Ibm Operating Systems, Power Operating Systems
Publisher: World Heritage Encyclopedia


Developer IBM
Working state Current
Source model Closed source
Initial release 1988
Latest release 7.2 TR2 / May 29, 2015
Marketing target Minicomputer and enterprise server
Available in English
Kernel type shares many Microkernel (SLIC) and Virtual machine (TIMI) design philosophies
License Proprietary
Official website IBM i
The logo for i5/OS

IBM i is an EBCDIC-based operating system that runs on IBM Power Systems and on IBM PureSystems. The name was introduced in 2008, and it is the current evolution of the operating system, previously named i5/OS, and originally named OS/400 when it was introduced with the AS/400 computer system in 1988.

It is one of the operating systems supported on IBM Power Systems alongside AIX and Linux as well as on IBM PureSystems alongside AIX, Linux and Windows.


  • History 1
  • Features 2
  • Version 3
  • See also 4
  • User groups 5
  • References 6
  • External links 7


The early

  • IBM i at
  • IBM Systems IBM i Magazine
  • IBM developerWorks: Articles, tutorials, and technical resources for IBM i users
  • IBM i Wiki: A collaborative environment for the sharing of technical information related to IBM i
  • IBM developerWorks Article: New to IBM i

External links

  1. ^ a b c Soltis, Frank, "Inside the AS/400"; Frank Soltis was the AS/400 system architect.
  2. ^ "Node.js". IBM i Technology Updates - Open Source Technologies. 
  3. ^ IBM Introduces the First in a New Generation of Power Systems
  4. ^ "COMMON". COMMON. Retrieved 2013-11-13. 
  5. ^ "Young i Professionals (YIPS)". YIPS. Retrieved 2013-11-13. 


User groups have played a major part in the evolution of the IBM i. The largest such group is COMMON.[4] The Young i Professionals (YIPS) [5] is another group that has been significant in influencing the direction of the IBM i.

User groups

See also

Version 7.2 latest refresh TR2 was released in May 2015

With 7.1, IBM started delivering new updates to the operating system via Technology Refreshes, where number 10 was released in May 2015.

The latest version of IBM i is 7.2, announced on April 28, 2014 and released on May 2, 2014 (Version Support Schedule).

When IBM announced the new Power Systems line of servers on April 2, 2008, they renamed the operating system from i5/OS to IBM i[3] and changed the version identifier format from VxRxMx (Version, Release, Modification, e.g. V6R1M0) to the more standard format (e.g. 6.1).


In 2014, IBM ported Node.js to IBM i.[2]

In 2013, IBM and PowerRuby Inc. announced PowerRuby as a commercially supported port of the Ruby programming language and the Ruby on Rails Web application framework for IBM i. PowerRuby will be offered as a free download to be installed on customer machines.

In 2011, IBM and Zend Technologies announced Zend DBi as replacement for the MySQL on IBM i support with a first General availability release in 2012.

In 2007, IBM and MySQL AB announced a joint technology and reseller agreement to bring support for the MySQL open source database and DB2 for i as a certified MySQL storage engine to the IBM i platform, which was later in 2011 dropped by MySQL AB.

In 1999, IBM introduced logical partitioning (LPARs) with i5/OS to support multiple virtual systems on a single hardware footprint.

The IBM i Access licensed product includes iSeries Navigator, a client-based and web-based graphical tool for administration of the system, database, Apache web server, and WebSphere Application Server. IBM Systems Director Navigator for i now can be used to manage target servers running IBM i 5.4, 6.1 or 7.1 from a single browser environment with the IBM i 7.1.

Another peculiar feature is that this system was one of the earliest to be object-based. Unlike traditional OSes like UNIX and Windows NT there are no files, only objects of different types. It implemented one of the earliest-known systems for persistent objects. Further, the objects persist in very large, flat virtual memory, called a single-level store.[1]

[1] IBM designed IBM i as a "



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