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UNIX V4 tape successfully recovered: First ever version of UNIX written in C is running again

Crucial early evolutionary step found, imaged, and ... amazingly ... works Computer History Museum software curator Al Kossow ...
Network World

Unix turns 40: The past, present and future of the OS

Forty years ago this summer, a programmer sat down and knocked out in one month what would become one of the most important pieces of software ever created. In August 1969, Ken Thompson, a programmer ...