The Unix revolution—thank you, Uncle Sam? Why did the Unix operating system expand so quickly in the 1970s and 1980s?

Wheelwright, Steven C. "Sun Microsystems and the UNIX Operating System: Creation of a Standard?, Teaching Note." Harvard Business School Teaching Note 690-042, December 1989.

If you're new to the UNIX operating system, especially if you're familiar with Windows, you'll find that the file access control mechanisms might not be exactly what you expect.

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