Irix is a AT&T System V based
Unix Operating System with
BSD extensions developed by
SGI to run natively on their 32- and 64-bit
MIPS architecture workstations and servers. Irix was one of the first
Unix flavors to feature a
GUI for the main desktop environment and is currently used widely due to extremely high performance
3D graphics.
The current version is IRIX 6.5.x