At Age 13, Wikipedia Has Reshaped the Knowledge Industry

If you look at the Wikipedia entry for Wikipedia, you'll learn the Internet's encyclopedia turned 13 Wednesday. In that time, the site has become a storehouse of human knowledge, the sixth most-popular site on the Internet and a disruptive force in the knowledge-gathering industry

Even the venerable Encyclopaedia Britannica, the oldest continually published English language encyclopedia, had to take heed of Wikipedia. Though neither publication talks about themselves as direct competitors, a report comparing the two caused some introspection at Britannica.