Interestingly, actual bona fide AT&T System 5 Release 3 Unix had a "help" command, which was a full-screen menu-driven interactive help system. * https://unix.

Interestingly, actual bona fide AT&T System 5 Release 3 Unix had a "help" command, which was a full-screen menu-driven interactive help system. * https://unix.stackexchange.com/a/448799/5132 https://unix.stackexchange.com/a/448799/5132 There was also "learn", in BSD as I recall.