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A beta test version of AIX 5L for IA-64 systems was released, but according to documents released in the SCO v. In the late 1990s, under Project Monterey, IBM and the Santa Cruz Operation planned to integrate AIX and UnixWare into a single 32-bit/ 64-bit multiplatform UNIX with particular emphasis on running on Intel IA-64 (Itanium) architecture CPUs. Version 4.1, in a slightly modified form, was also the standard operating system for the Apple Network Server systems sold by Apple Computer to complement the Macintosh line. AIX Version 4, introduced in 1994, added symmetric multiprocessing with the introduction of the first RS/6000 SMP servers and continued to evolve through the 1990s, culminating with AIX 4.3.3 in 1999.
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Since 1990, AIX has served as the primary operating system for the RS/6000 series (later renamed IBM eServer pSeries, then IBM System p, and now IBM Power Systems).
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In developing AIX, IBM and Interactive Systems Corporation (whom IBM contracted) also incorporated source code from 4.2 and 4.3 BSD UNIX.Īmong other variants, IBM later produced AIX Version 3 (also known as AIX/6000), based on System V Release 3, for their POWER-based RS/6000 platform.
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ĪIX Version 1, introduced in 1986 for the IBM RT PC workstation, was based on UNIX System V Releases 1 and 2. The operating system offered special facilities for interoperating with PC/IX, Interactive/IBM's version of Unix for IBM PC compatible hardware, and was licensed at $10,000 per sixteen concurrent users.
It took until 1985 for IBM to offer its own Unix on the S/370 platform, IX/370, which was developed by Interactive Systems Corporation and intended by IBM to compete with Amdahl UTS. In the process, IBM made modifications to the TSS/370 hypervisor to better support Unix.
IBM's own involvement in Unix can be dated to 1979, when it assisted Bell Labs in doing its own Unix port to the 370 (to be used as a build host for the 5ESS switch's software). This port would later grow out to become UTS, a mainframe Unix offering by IBM's competitor Amdahl Corporation. By 1976, the operating system was in use at various academic institutions, including Princeton, where Tom Lyon and others ported it to the S/370, to run as a guest OS under VM/370. Unix started life at AT&T's Bell Labs research center in the early 1970s, running on DEC minicomputers.
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It is currently supported on IBM Power Systems alongside IBM i and Linux.ĪIX was the first operating system to have a journaling file system, and IBM has continuously enhanced the software with features such as processor, disk and network virtualization, dynamic hardware resource allocation (including fractional processor units), and reliability engineering ported from its mainframe designs.
The AIX family of operating systems debuted in 1986, became the standard operating system for the RS/6000 series on its launch in 1990, and is still actively developed by IBM. It is one of four commercial operating systems that have versions certified to The Open Group's UNIX 03 standard (the others being macOS, HP-UX and eulerOS), and one of 12 certified to the UNIX 95 standard. Originally released for the IBM RT PC RISC workstation, AIX now supports or has supported a wide variety of hardware platforms, including the IBM RS/6000 series and later POWER and PowerPC-based systems, IBM System i, System/370 mainframes, PS/2 personal computers, and the Apple Network Server.ĪIX is based on UNIX System V with 4.3BSD-compatible extensions. History of IBM mainframe operating systemsĪIX ( Advanced Interactive eXecutive, pronounced / ˌ eɪ aɪ ˈ ɛ k s/, “ay-eye-ex”), is a series of proprietary Unix operating systems developed and sold by IBM for several of its computer platforms. KornShell (ksh88), Common Desktop Environment, Monolithic with dynamically loadable modules JSTOR ( February 2010) ( Learn how and when to remove this template message)įebruary 1986 35 years ago ( 1986-02) ħ.2 TL5 / November 2020 11 months ago ( 2020-11)įormer: IBM ROMP, PowerPC, x86 ( IBM PS/2), System/370, ESA/390.Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.