Tim Berners-Lee created the World Wide Web in 1989 while working at CERN, inventing the first web browser called WorldWideWeb. In 1990, he created the first website and server. By 1993, the World Wide Web was released to the public, and in 1994 the first online purchase was made from Pizza Hut. In the late 1990s and 2000s, major tech companies and social media sites like Google, Facebook, YouTube, and Twitter were founded, revolutionizing how people use and share information online.