A NeXT Computer was used by Berners-Lee as the world's first web server and also to write the first web browser, WorldWideWeb, in 1990. By Christmas 1990, Berners-Lee had built all the tools necessary for a working Web:[7] the first web browser (which was a web editor as well); the first web server; and the first web pages,[8] which described the project itself. On August 6, 1991, he posted a short summary of the World Wide Web project on the alt.hypertext newsgroup.[9] This date also marked the debut of the Web as a publicly available service on the Internet. The first server outside Europe was set up at SLAC to host the SPIRES-HEP database. Accounts differ substantially as to the date of this event. The World Wide Web Consortium says December 1992,[10] whereas SLAC itself claims 1991.[11][12] This is supported by a W3C document entitled A Little History of the World Wide Web.[13]

CERN, the European Organization for Nuclear Research, is where it all began in March 1989. A physicist, Tim Berners-Lee, wrote a proposal for information management showing how information could be transferred easily over the Internet by using hypertext, the now familiar point-and-click system of navigating through information. The following year, Robert Cailliau, a systems engineer, joined in and soon became its number one advocate. The idea was to connect hypertext with the Internet and personal computers, thereby having a single information network to help CERN physicists share all the computer-stored information at the laboratory. Hypertext would enable users to browse easily between texts on web pages using links.

While an independent contractor at CERN from June to December 1980, Berners-Lee proposed a project based on the concept of hypertext, to facilitate sharing and updating information among researchers.[9] While there, he built a prototype system named ENQUIRE.[

Flatclassroom: Emergence of the World Wide Web
In the 1990's the emergence of the Internet as a tool of low-cost global connectivity; the emergence, on top of the Internet, of the World Wibe Web enable people to post their digital content for everyone else to access; and , finally, the spread of the commercial Web browser, which could retrieve documents or Web pages stored in Web sites and display them on any computer screen in such a simple manner that everyone would- and did- want to use it.
The concept of a WWW was developed by British computer scientist Tim Berners-Lee. Berners Lee is someone who certainly helped to flatten the world. He created the WWW and posted the first Web Site in 1991.
The first big breakthrough to bring the Internet alive as a tool of connectivity and collaboration was Berners-Lee's WWW. Although people often use the terms WWW and Internet interchangeably they are not the same.
Berners-Lee explains: "The Web is an abstract space of information. On the Net you find computers-on the Web, you find documents, sounds, videos, information. On the Net, the connections are cables between computers; on the Web, connections are hypertext links. The Web exists because of programs which communicate between computers on the Net. The Web could not be without the net. The web made the net useful because people are really interested in info. and don't really want to have to know about computers and cables."