Definition i5/OS WhatIs.com i5/OS is the name IBM has given to its newest release of OS/400 V5R3. i5/OS runs on IBM's i5 servers, which are based on IBM's Power5 microprocessors. This was last updated in October 2008 Continue Reading About i5/OS IBM provides an overview of i5/OS. Related Terms CIW (Computer Intensive Workload) In IBM's AS/400 and iSeries line of computers, CIW (Computer Intensive Workload) is a measure that can be used to compare the ... See complete definition lock A lock is a mechanism for controlling access to something. In programming, locks are often used so that multiple programs or ... See complete definition midrange In general, midrange refers to computers that are more powerful and capable than personal computers but less powerful and capable... See complete definition Dig Deeper on iSeries system performance and monitoring iSeries tutorials Search400.com's tutorials provide in-depth information on the iSeries. Our iSeries tutorials address areas you need to know about, including i5/OS, iSeries applications, iSeries 400 basics, and OS/400-i5/OS security. IBM introduces Power System family of servers IBM has brought together its I-series and P-series servers into one family, called Power System, designed to support 15,000 applications for Linux and i5/OS. System i5/OS operating system due out in March Big Blue has announced the new i5/OS V6R1 and its various features, including the ability to run on blade servers. New i5/OS features announced as anticipation mounts In light of the recent enhancements to i5/OS V6R1, including new RPG functionalities, we've put together a brief retrospective of i5 news and tips. Using indexes on DB2 for i5/OS to improve performance Expert Kent Milligan explains how to use indexes to optimize SELECT statement performance on i5/OS. IBM offers i5/OS details IBM has unveiled details of the next version of its flagship integrated operating system, i5/OS, which is due to ship in 2008.