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IRIX is the Unix-like Operating System by SGI.

It is unusual for a current commercial UNIX because it is BSD based, rather than being based on System V. As such, it is capable of phenomenal long uptime. Its XFS filesystem is one of the most advanced journaling file systems in the industry.

IRIX has particularly strong support for 3D graphics, video and high-bandwidth bulk data transfer. IRIX is mostly used in the computer animation industry, and for scientific visualization[?].

SGI currently plans to end-of-life it along with MIPS, in favor of Linux on Itanium. This will probably not happen any time soon.

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