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

UNIX V4, the first ever version of the UNIX operating system in which the kernel was written in the then-new C programming ...
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52 years later, UNIX V4 has been rediscovered and digitized

Linux, macOS, FreeBSD, Android, and other operating systems can trace their lineage back to the early commercial versions of Unix. One of the missing links in that chain, UNIX Fourth Edition, is now ...