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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?

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closed as not constructive by Daniel, bmike, patrix, user495470, jmlumpkin Aug 31 '12 at 10:32

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This should cover everything you're looking for:

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Wikipedia is a good place to start reading about Mac history.

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