What is 'www'? Why it is used in a web address? Please, explain it briefly.?

-I know it is world wide web, but I would like to have an elaborate explanation of it. Why this is used on that position, I mean what is the structure. Does it hold any numerical value?Follow this link... http://en.wikipedia.org/wiki/World_wide_鈥?/a>Also, see no "www.": http://no-www.org/



Validate your own site: http://get-validated.com/



Mine is Class A



Ron
Worldwide Web.