And you would not be mistaken: https://www.freebsd.org/cgi/man.cgi?query=init&apropos=0&sektion=0&manpath=Unix+Seventh+Edition&arch=default&format=html https://

And you would not be mistaken: https://www.freebsd.org/cgi/man.cgi?query=init&apropos=0&sektion=0&manpath=Unix+Seventh+Edition&arch=default&format=html https://www.freebsd.org/cgi/man.cgi?query=init&apropos=0&sek... According to Wikipedia, runlevels were indeed introduced by SysV UNIX.