I am interested in old school technology. The Mac OS X is based on UNIX. I am interested in the old school OS, Mac OS 9, what is this based on? Can it run the UNIX application? What is the file system in Mac OS 9?
closed as not constructive by Daniel Lawson♦, bmike♦, patrix♦, Lauri Ranta, jmlumpkin Aug 31 '12 at 10:32
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This should cover everything you're looking for: http://en.m.wikipedia.org/wiki/History_of_Mac_OS