The World Wide Web was created in 1989 by Sir Tim Berners-Lee, working at CERN in Geneva, Switzerland. Since then, Berners-Lee has played an active role in guiding the development of Web standards (such as the markup languages in which Web pages are composed), and in recent years has advocated his vision of a Semantic Web. Robert Cailliau, also at CERN, was an early evangelist for the project.
Also, Sir Timothy John Berners-Lee. With the help of Robert Cailliau, and a young student staff at CERN, he implemented his invention in 1990, with the first successful communication between a client and server via the Internet on December 25, 1990. He is also the director of the World Wide Web Consortium or W3C (which oversees its continued development), and a senior researcher and holder of the 3Com Founders Chair at the MIT Computer Science and Artificial Intelligence Laboratory (CSAIL).