How the heck does a Web Site work?

But like really?

What is the internet? It's something people use every day (and that you're using right now, believe it or not) but how does it work? When all you see is the complete, presentable Web-Page it isn't obvious just how much goes into building even a simple webpage.

This website will cover the three main programming languages used for Web Development. It's meant more as an introduction than anything - just something for people who want to decide if it's something they're interested in.