Hidden in storage, a University of Utah research associate happened upon the only known ...

It took careful work to recover the UNIX V4 operating system from the 9-track magnetic tape. The software is foundational for ...
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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 has successfully retrieved the contents of the over-half-a-century old ...