As Unix approaches its 50th anniversary, some folks have assembled a site where you can access amazing simulations of the early days... This has simulations of various editions of Unix, including, it would appear, "version 0," aka UNICS https://unix50.org/ SDF Public Access UNIX System presents ... /~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/ /~/~ H Y S T E R I C A L ~ U N I X ~ S Y S T E M S ~/~/ /~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/~/ [a] UNICS (Version Zero) PDP-7 Summer 1969 [c] Fifth Edition UNIX PDP-11/40 June 1974 [d] Sixth Edition UNIX PDP-11/45 May 1975 [e] Seventh Edition UNIX PDP-11/70 January 1979 [f] Research UNIX 8 VAX-11/780 1981 [g] AT&T UNIX System III PDP-11/70 Fall 1982 [h] AT&T UNIX System V PDP-11/70 1983 [i] AT&T UNIX System V 3b2/400 1984 [j] 2.11 BSD PDP-11/70 January 1991 [q] QUIT (and run away in fear!) User contributed tutorials are at https://sdf.org/?tutorials Also worth consulting include... https://github.com/dspinellis/unix-history-repo https://lwn.net/Articles/725297/ -- When confronted by a difficult problem, solve it by reducing it to the question, "How would the Lone Ranger handle this?"