What is Cyberspace?

This project is supposed to explore what cyberspace is about, what is it for? Is it a real thing? Where does it exist? We know it existed before the Web, and before the internet, and before the telephone, and before the telegraph. How can we map it? How can we understand it? and what applications can we create to make it more real and understandable? So the project needs to create an application of some kind to help bring together all the conclusions.