You're not looking far enough afield. Those are all procedures to manipulate text. Perl is good at that, and anything else is a pretender to the throne.

But what about totally different problems? How about expert systems, where Lisp and Prolog rule, or functional programming where ML seems hot right now, or device-driver writing, or realtime systems, or embedded systems with 1K of RAM?

In theory, all languages that we would consider calling languages are "Touring Complete", meaning that they can all compute anything computable. So to that degree it can do anything, sure.

—John