`fork()` in the kernel is a prerequisite for `&` in the shell, but not the same thing. Another sample point: job control first came to shells in 1981 (http://gu

`fork()` in the kernel is a prerequisite for `&` in the shell, but not the same thing. Another sample point: job control first came to shells in 1981 (http://gunkies.org/wiki/4.1_BSD http://gunkies.org/wiki/4.1_BSD). Perhaps '&' too originated then?