Question : What is a binary tree and how does it work?

What is a binary tree and how does it work?

I am sure I worked with them years ago, but have forgotten the details.  I use Borland's Pascal Database Tools, which I think was binary tree.  Anyway, I never coded one and just want to be reminded of how they work...

Answer : What is a binary tree and how does it work?

This might be the best visual example:
http://www.youtube.com/watch?v=coRJrcIYbF4