About the dollar sign ($) in javascript

I’m writing this short post because I think that many people are puzzled by the $ sign in java script. When I started using jQuery I thought that the $ sign have some super powers or do some woody magic. The truth is the dollar sign is "special" in javascript but unfortunately doesn’t do woody magic.Why the $ sign is special?Because you can do this: var $ = "Hello World";But you can’t do this: