Most Beneficial Programming Language

I know there's several threads on what programming language to learn first, but what I'm curious to is which language would prove to be best to learn just for the sake of learning about how things run within computers, hacking and just the sake of knowledge, and not necessarily which language allows me write programs in a simple syntax. I know the most in C, is this a good language to learn for what I want?

I suggest C++ or ASM. Although ASM is very hard, it is still more powerful than C++.

Here are some I suggest:

C++

Good software language. I like it, syntax is easy enough and it's pretty powerful. Plus, if you plan on going professional with programming, C++ looks pretty good on any resume.

Perl

Useful as well, Perl is good for most anything that C++ is, and it has components that make it ideal for any apps you plan on making that will interact with the Internet

Oh, and don't forget web-based programming language, like HTML and PHP.

ASm definitely. You learn how memory works and all that low level goodness. Asm is very hard to grasp at first but once u begin to understand what exactly those commands are doing it all come together nicely. :)

lisp

Perl/Lisp!

When you're a windows user, and scared of learning much, install the latest Visual Studio.

brainfuck lol

( just jokin)

jesus lisP? may as well learn prolog while your at it.. don't bother its a waste of time.

learn C C++ and asm

C/C++/ASM/PERL/PHP ftw!