www-

These three W’s are short for World Wide Web. The World Wide Web is a global information space, and is also called the The Web. Text documents, images, multimedia and other types of resources are identified with URLs so that each can be found in a simple way.

The World Wide Web is actually the system by which information on the Internet is categorized and not the Internet itself. The World Wide Web is like the Dewey Decimal system for the Internet.