There really is a BSD, and these people are using it, but it is just a part of the system they use. BSD is the kernel: the program in the system that allocates the machine’s resources to the other programs that you run. The kernel is an essential part of an operating system, but useless by itself; it can only function in the context of a complete operating system. BSD is normally used in combination with POSIX-compliant software and utilities: the whole system is basically POSIX with BSD added, or POSIX/BSD. All the so-called “BSD” distributions are really distributions of POSIX/BSD!
That was great, up until the part about GNU. GNU hasn’t had anything to do with BSD for over a decade. Maybe use POSIX instead. 😊
How about:
There really is a BSD, and these people are using it, but it is just a part of the system they use. BSD is the kernel: the program in the system that allocates the machine’s resources to the other programs that you run. The kernel is an essential part of an operating system, but useless by itself; it can only function in the context of a complete operating system. BSD is normally used in combination with POSIX-compliant software and utilities: the whole system is basically POSIX with BSD added, or POSIX/BSD. All the so-called “BSD” distributions are really distributions of POSIX/BSD!