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IRIX is a Linux-based operating system from Silicon Graphics Inc. It is compatible with UNIX system V with Berkley Software Distribution extensions. The IRIX operating system is optimized for applications using 3D visualizations and virtual reality environments.
IRIX was first released in 1988 when UNIX 3.0 was released for the IRIS series of servers and work stations. Integrating IRIX provided the first real-time 3D X Windows by integrating Open Graphics Library with the X Window System environment. IRIX supports symmetric multiprocessing (SMP) as well as 64-bit and 32-bit environments. IRIX is the first UNIX-based operating system supporting SMP. It is designed for SGI computers.
The main versions of the IRIX OS are: