Here's the document release you were waiting for today!
The UNIX V4 tape!
https://archive.org/details/utah_unix_v4_raw
[edit: upload ongoing, hope it'll be done soon]
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Discussion
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Here's a copy of the filesystem that has been extracted as a .tar file: http://squoze.net/UNIX/v4/
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The more we look into this, the more it appears that this is a complete system or pretty close to it! There's a kernel, userspace binaries, source, including userland, kernel, device drivers, seems to be the full UNIX V4!
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Today in UNIX v4 news! Our local newspaper, @sltrib did a fantastic writeup on the tape: https://www.sltrib.com/news/education/2026/01/07/university-utah-finds-tape-with/
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Also, a live piece on local TV news this morning: https://www.youtube.com/watch?v=m-3RJaKcw_4
UNIX v4 program found cleaning out an office at the University of Utah
YouTube
Thread about the .tap format for those who want to dig in more:
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