Who invented the World Wide Web while working at CERN?

Tim Berners-Lee invented the World Wide Web while working at CERN.

In 1989, the English computer scientist proposed an information-management system to help CERN researchers share documents across the organization. His idea combined hypertext links with the Internet, allowing documents on different computers to reference one another without relying on a single hierarchical filing system.

Berners-Lee built the first working web system during 1990. It included the first web browser, which was also an editor, and the first web server. He also created the core technologies that made the Web function: HTML for document structure, HTTP for communication, and URLs for identifying resources. Robert Cailliau collaborated with him on advancing the project, but Berners-Lee is recognized as its inventor.

The first website went online at CERN in 1990, and the Web was released more broadly in 1991. CERN placed the Web software in the public domain in 1993, helping it spread rapidly. The Web and the Internet are related but different: the Internet is the underlying network, while the Web is a system of linked resources that runs on it.