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May 17, 2020

In the current day Linux is the most widely used UNIX-like operating system. It's rise to prominence has been an amazing success story. From it's humble beginnings Linux has grown to power everything from super computers to car stereos. But it's not the first UNIX clone. A much earlier system existed, called Coherent. And as it turns out both Linux and Coherent share a lot of similarities. The biggest difference being that Coherent was closed source.

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Important dates in this episode:

1973: AT&T UNIX V4 Goes Public
1949: DOJ Sues AT&T Over Antitrust Violations
1975: AT&T UNIX V6 Released
1977: First Version of BSD Circulates
1977: XYBASIC Released by Mark Williams Company
1980: Coherent Released for PDP/11
1983: Coherent Comes to the IBM PC/XT
1995: Mark Williams Company Closes