aiSee: Unix Evolution Diagrams

Unix Evolution Diagram 1

Unix Evolution Diagram 2

Time diagram 1 recreated according to Silberschatz/Peterson/Galvin, “Operating System Concepts”, Addison Wesley 1991, and Leffler/McKusick/Karels/Quarterman, “The design and Implementation of the 4.3 BSD UNIX Operating System”, Addison Wesley 1989. Diagram 2 based on a graph by Darwin/Collyer, 1984 and 1986.