📜 About Unix v4
Released November 1973 - the first Unix written in C, making it portable across hardware platforms.
This is the only known copy, recovered in 2025 from a magnetic tape discovered at the University of Utah after 52 years.
Running on an emulated PDP-11/45 minicomputer, the same hardware used at Bell Labs.
Sources: squoze.net | tape recovery story
💝 Feedback & Contact: Check out our guestbook below, or send private feedback to [email protected]
⚠️ Important Notes
• Backspace doesn't work!
Press # to delete char, @ for line
• Use chdir not cd
• No man pages (that's v5+)
• Sessions are temporary (10min timeout if left idle) and ephemeral (state is not saved between sessions and reset on page reload)
• Authentic 1973 behavior - expect quirks!