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Latest revision Your text
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IRIX 3.x is based on [[UNIX System V]] Release 3 with [[4.3BSD]] enhancements, and incorporates the 4Sight [[windowing system]], based on [[NeWS]] and [[IRIS GL]]. SGI's own [[Extent File System]] (EFS) replaces the System V filesystem.<ref name="history">{{cite web

IRIX 3.x is based on [[UNIX System V]] Release 3 with [[4.3BSD]] enhancements, and incorporates the 4Sight [[windowing system]], based on [[NeWS]] and [[IRIS GL]]. SGI's own [[Extent File System]] (EFS) replaces the System V filesystem.<ref name="history">{{cite web

|url=https://ryan.tliquest.net/sgi/irix_versions.html|title=History of IRIX|access-date=November 18, 2022}}</ref>

|url=https://ryan.tliquest.net/sgi/irix_versions.html

|title=History of IRIX

|access-date=November 2, 2007

}}</ref>



IRIX 4.0, released in 1991, replaces 4Sight with the [[X Window System]] (X11R4), the [[4Dwm]] [[window manager]] providing a similar look and feel to 4Sight.<ref name="history"/>

IRIX 4.0, released in 1991, replaces 4Sight with the [[X Window System]] (X11R4), the [[4Dwm]] [[window manager]] providing a similar look and feel to 4Sight.<ref name="history"/>

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The last major version of IRIX is 6.5, released in May 1998. New minor versions of IRIX 6.5 were released every quarter until 2005, and then four minor releases. Through version 6.5.22, there are two branches of each release: a [[maintenance release]] (identified by an "m" suffix) that includes only fixes to the original IRIX 6.5 code, and a feature release (with an "f" suffix) that includes improvements and enhancements. An overlay upgrade from 6.5.x to the 6.5.22 maintenance release was available as a free download, whereas versions 6.5.23 and higher required an active Silicon Graphics support contract.

The last major version of IRIX is 6.5, released in May 1998. New minor versions of IRIX 6.5 were released every quarter until 2005, and then four minor releases. Through version 6.5.22, there are two branches of each release: a [[maintenance release]] (identified by an "m" suffix) that includes only fixes to the original IRIX 6.5 code, and a feature release (with an "f" suffix) that includes improvements and enhancements. An overlay upgrade from 6.5.x to the 6.5.22 maintenance release was available as a free download, whereas versions 6.5.23 and higher required an active Silicon Graphics support contract.



A 2001 ''[[Computerworld]]'' review found IRIX in a "critical" state. SGI had been moving its efforts to [[Linux]] and the [[Microsoft Windows|Windows]]-based [[SGI Visual Workstation]] but MIPS and IRIX customers convinced SGI to continue to support its platform through 2006.<ref>{{cite news|url=https://www.computerworld.com/article/2584450/vital-signs-for-unix.html|title=Vital Signs for Unix|author=Tom Yager|newspaper=[[Computerworld]]|date=November 19, 2001|access-date=November 18, 2022}}</ref> On September 6, 2006, an SGI press release announced the end of the MIPS and IRIX product lines.<ref>{{cite web

A 2001 ''[[Computerworld]]'' review found IRIX in a "critical" state. SGI had been moving its efforts to [[Linux]] and the [[Microsoft Windows|Windows]]-based [[SGI Visual Workstation]] but MIPS and IRIX customers convinced SGI to continue to support its platform through 2006.<ref>{{cite news|url=https://www.computerworld.com/article/2584450/vital-signs-for-unix.html|title=Vital Signs for Unix|author=Tom Yager|newspaper=[[Computerworld]]|date=November 19, 2001|access-date=June 6, 2015}}</ref> On September 6, 2006, an SGI press release announced the end of the MIPS and IRIX product lines.<ref>{{cite web

|url=http://www.sgi.com/support/mips_irix.html

|url=http://www.sgi.com/support/mips_irix.html

|title=SGI - Services & Support: End of General Availability for MIPS IRIX Products

|title=SGI - Services & Support: End of General Availability for MIPS IRIX Products

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