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 ...
The Register on MSN

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 ...