Morgan Stanley Dean Witter is a huge investment bank with
offices world wide and about 60,000 employees, of which 2,000
in IT. The entire company runs on Perl. It's the number 1
language for internal development, followed by C++. They
avoid C as much as possible, and Java isn't popular either.
As one of their people recently said "What we are doing with
Perl goes beyond what Java only promises so far, and we have
been doing so for years".