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====== Silicon Graphics Computer Systems GL2  ======

**Release Date:** May, 1986\\ 
**Released By:** Silicon Graphics Computer Systems\\
**Source Code: ** 3.6 archived on Bitsavers\\
**History: **

SGI GL2 is an early derivative of [[sys5|System V "Release 0"]] released on the IRIS 1000 through 3000 terminals and workstations (The different editions are prefixed with T for terminal or W for workstation). 

It utilized the MEX Graphical User Interface, an early, non-X11 and non-NeWS GL-accelerated interface. 

It was eventually replaced by 4D1 after the acquisition of MIPS Computer Systems by SGI, and 4D1 combined elements of both MIPS Computer Systems umips aka risc/os UNIX and GL2. This coincided with the transition from the Motorola 68000 to the MIPS R-series CPUs. 

**Documentation: **

  * [[http://www.bitsavers.org/pdf/sgi/iris/007-3206-010_GL2-W3.6_Release_Notes_1987.pdf | GL2 W3.6 release notes]]
  * [[http://www.bitsavers.org/pdf/sgi/iris/007-1103-010_IRIS_Programming_Tutorial_v1.0_1986.pdf | IRIS Programming Tutorial]]
  * [[http://www.bitsavers.org/pdf/sgi/iris/007-1101-040_IRIS_Users_Guide_Vol1_V4.0_1987.pdf | IRIS Users Guide Volume 1]]

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**Works Cited**
  - [[http://tech-pubs.net/wiki/index.php/GL2-2.x]]
  - [[http://www.sgistuff.net/software/gl2history/index.html]]
  - [[https://archive.irixnet.org/irisfaq/]]