GL2-1.x
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GL2 1.x was used on the IRIS 1000 series of workstations and terminals, part of the larger 68k-based SGIs (IRIS Series). Limited information on this version of the OS has survived.
What is Known
GL2 1.x is derived from the BSD-based versions of SunOS with UnixSoft System III as a base. It predates MEX, and primarily was heavily dependent on framebuffer-based graphics. It only ran on the terminal and workstation class IRIS 1000 systems.
