4th Edition Unix in the Browser

Summary

📜 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!