Why do lnternet address start with "http://www"?

 Why do lnternet addresses start with "http://www"?

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HTTP, is stand for "hypertext transfer protocol",is the language of rules which controls how your browser navigates the network of linked pages known as the World Wide Web (is where the "www" comes). When you enter a website name into your browser's address bar(link within pages), protocols contact the site's hosting server and fetch the requested web page, which then pops up on your computer screen.