You can download a little diagram of Unix history in PostScript A4 or in PDF A4. If you prefer, you can use the PostScript Letter format or the PDF Letter format. Below, you can see the preview :

1	2	3	4	5	6	7	8	9	10	11	12
Clic on a page to get a bigger image.

This diagram is only a very simplify unix history. There are a lot more unix like systems than those listed in this chart, maybe 10 times more ! Some years ago, every electronic company has it's own unix system. For example, my company was selling an unix, derivated from another one, and those two are not in this chart because there are too small. So this diagram is only the upper part of an iceberg, with a penguin on it ;-).

Brian Kernighan	Dennis Ritchie	Ken Thompson	Bill Joy	Steve Jobs*

Some useful links :

• The Creation of the UNIX Operating System from Lucent.
  
• UNIX Past from The Open Group.
• History of UNIX by Ronda Hauben.
• UNIX History Graphing Project by Warren Toomey.
• FreeBSD Release Information from FreeBSD.
• BSD History Chart from FreeBSD.
• Server OS Technical Comparison from Milo.
• Sun History from SUN.
• HP History from HP.
• The SGI IRIX 6.5/MIPS Roadmap from SGI.
• Unix and Multics by Tom Van Vleck.
• Unix Start from the University of Georgia.
• Chronology of Events in the History of Microcomputers by Ken Polsson.
• Linux Kernel, Linux Kernel Notes, and Linux Kernel Version History.
  
  
• Histoire de l'informatique : Unix (in french) by Serge Rossi.

• Computer Languages History.
• Unix Hierarchy (an old paper).
• NeXT History (in french).
• Windows History.
• Download a "tar.gz" image of this site

* You may be wondering "Why does Steve Jobs appear in this unix history?". Simply because he has made the best unix computer ever : a NeXTcube powered with NeXTSTEP operating system.