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52-year-old data tape could contain only known copy of UNIX V4

It might have the first-ever version of UNIX written in C A tape-based piece of unique Unix history may have been lying ...
Computerworld

A good question: What does the SCO Unix code reveal?

As it promised to do two weeks ago, The SCO Group Inc. has revealed to several industry analysts some of the Linux source code that it claims was illegally copied from Unix. But opinions vary on what ...