What Is This? (Registry)

someone please point me to the references.

http://www.winguides.com/registry/

http://www.easydesksoftware.com/

I don't really understand what you are asking...

Do you want to know what the registry keys do?

They are the system settings... define almost everything in the operating system... services, security settings, policies, yada yada yada...

What kind of references are you looking for? Something to understand the registry?
Tutorials?
Tweaks