Hypertext and the Browser Revolution
The World Wide Web, invented by Tim Berners-Lee at CERN in 1989 and first made publicly available in 1991, transformed the internet from a tool used primarily by academics and technologists into a global information medium accessible to anyone with a computer and a phone line. Berners-Lee's insight was to combine three existing technologies — hypertext for linking documents, the internet for transporting data, and a simple markup language for formatting content — into an integrated system that made publishing and accessing information dramatically easier than any previous method. The web did not replace the internet but rather provided an intuitive layer on top of it that opened the network to millions of non-technical users.
The three pillars of the web are HTML, the HyperText Markup Language used to structure and format web pages; HTTP, the HyperText Transfer Protocol used to transmit web content between servers and browsers; and URLs, Uniform Resource Locators that provide unique addresses for every page and resource on the web. The genius of this system lies in its simplicity and openness: anyone can create a web page using basic text editing tools, host it on a server, and make it accessible to the entire world without seeking permission from any central authority. This permissionless publishing model unleashed an explosion of creativity and information sharing that no previous communication technology had enabled.
The release of the Mosaic web browser in 1993, developed by Marc Andreessen and Eric Bina at the National Center for Supercomputing Applications, was the catalyst that brought the web to mainstream audiences. Mosaic, and its commercial successor Netscape Navigator, provided a graphical interface that displayed images inline with text, made navigation intuitive through clickable links and a back button, and ran on the Windows and Macintosh operating systems that dominated personal computing. The browser wars of the mid-1990s between Netscape and Microsoft's Internet Explorer drove rapid innovation in web technologies and brought millions of new users online. By the end of the decade, the web had spawned the dot-com boom, transformed industries from media and retail to education and government, and established itself as the most important platform for human communication and commerce since the telephone.