Beginnings of web content

While the Internet began with a U.S. Government research project in the late 1950s, the web in its present form did not appear on the Internet until after Tim Berners-Lee and his colleagues at the European laboratory (CERN) proposed the concept of linking documents with hypertext. But it was not until Mosaic, the forerunner of the famous Netscape Navigator, appeared did the Internet become more than a file serving system.

The use of hypertext, hyperlinks and a page-based model of sharing information, introduced with Mosaic and later Netscape, helped to define web content, and the formation of websites. Largely, today we categorize websites as being a particular type of website according to the content a website contains.
http://en.wikipedia.org/wiki/Web_content