He is widely regarded as the inventor of the World Wide Web, as he proposed the concept of a hypertext system to link documents across the Internet, and implemented the first web server and browser in 1990. He also created the standards for HTML, URI, and HTTP, and founded the World Wide Web Consortium (W3C) to oversee the development of the Web.
He was a colleague of Berners-Lee at CERN, and co-authored the first proposal for the World Wide Web in 1990. He also contributed to the development of the first web browser for the Macintosh, and helped organize the first International World Wide Web Conference in 1994.
He was the co-author of Mosaic, the first widely used web browser that popularized the Web in the early 1990s. He also co-founded Netscape, which developed the Netscape Navigator browser and the Netscape web server, and influenced the development of web standards and technologies such as JavaScript, SSL, and cookies.
He was the creator of JavaScript, the most widely used scripting language for web development and interactive web pages. He also co-founded the Mozilla Foundation, which developed the Firefox browser and other open-source web projects, and advocated for web standards and privacy.
He was the co-founder of Wikipedia, the largest and most popular online encyclopedia, and one of the most visited websites in the world. He also co-founded the Wikimedia Foundation, which supports other collaborative web projects such as Wiktionary, Wikibooks, and Wikidata.