Greg A. Woods writes:
> Indeed, lots of software *does* rely on it, and it can often be used
> very effectively.  Although the use of "unix" isn't specified in POSIX
> or The Single UNIX Specification (to the best of my knowledge), neither
> do any standards preclude its use (again, to the best of my knowledge).

Polluting the user namespace is, in fact, forbidden.

.pm