Here's the document release you were waiting for today!
The UNIX V4 tape!
https://archive.org/details/utah_unix_v4_raw
Credits:
* Jay Lepreau for holding on to this tape
* Aleksander Maricq for finding it
* Jon Duerig for driving it to the Computer History Museum
* Thalia Archibald for doing a huge amount of research into the tape, its history, and file formats, and the upload
* Al Kossow for the tape-reading equipment and doing the actual read
* Len Shustek for the lab where the read was done and the software used to decode it
#retrocomputing