<P> The first server outside Europe was installed at the Stanford Linear Accelerator Center (SLAC) in Palo Alto, California, to host the SPIRES - HEP database . Accounts differ substantially as to the date of this event . The World Wide Web Consortium's timeline says December 1992, whereas SLAC itself claims December 1991, as does a W3C document titled A Little History of the World Wide Web . The underlying concept of hypertext originated in previous projects from the 1960s, such as the Hypertext Editing System (HES) at Brown University, Ted Nelson's Project Xanadu, and Douglas Engelbart's oN - Line System (NLS). Both Nelson and Engelbart were in turn inspired by Vannevar Bush's microfilm - based memex, which was described in the 1945 essay "As We May Think". </P> <P> Berners - Lee's breakthrough was to marry hypertext to the Internet . In his book Weaving The Web, he explains that he had repeatedly suggested that a marriage between the two technologies was possible to members of both technical communities, but when no one took up his invitation, he finally assumed the project himself . In the process, he developed three essential technologies: </P> <Ul> <Li> a system of globally unique identifiers for resources on the Web and elsewhere, the universal document identifier (UDI), later known as uniform resource locator (URL) and uniform resource identifier (URI); </Li> <Li> the publishing language HyperText Markup Language (HTML); </Li> <Li> the Hypertext Transfer Protocol (HTTP). </Li> </Ul> <Li> a system of globally unique identifiers for resources on the Web and elsewhere, the universal document identifier (UDI), later known as uniform resource locator (URL) and uniform resource identifier (URI); </Li>

When was the first computer launched in world