I don't know about NASA, but at Damian Conway's OO class he said that Wall Street was using Parse::RecDescent to move millions of dollars a day...

Perl can be used for most things that C can, the trick is learning where it is better to use C, and where it is Better to use Perl, or something else. Perl is incredibly powerful, but in the end, you have to learn that for yourself :)

                - Ant
                - Some of my best work - Fish Dinner