Robert Cailliau (born 1947) is a Belgian informatics engineer and computer scientist. Cailliau helped Tim Berners-Lee develop the World Wide Web and ran the office computing systems group of CERN from 1987 to 1989. He joined Tim Berners-Lee in 1990 in order to start the World Wide Web. Cailliau is most known for the proposal he developed with Tim Berners-Lee of a hypertext system for accessing documentation. This proposal led to the creation of the World Wide Web.
In 1992 Cailliau produced the first web browser for the Apple Macintosh. In 1993, together with the Fraunhofer Gesellschaft, Cailliau started «WISE», the first web-based project at the European Commission. Cailliau also started the authentication scheme for the web and supervised its implementation. He worked with CERN to produce and get the document approved whereby CERN placed the web technology into the public domain.
Cailliau was one of the co-founders of the International WWW Conference Committee (IW3C2) after successfully organising the first conference in 1994. During 1995 he was active in the transfer of the WWW development efforts and the standards activities from CERN to the Web Consortium (W3C). He then started, with the European Commission, the Web for Schools project, which has given support and access to 150 schools in the European Union.
Biographical references (source):
http://internethalloffame.org/inductees/robert-cailliau#sthash.ZWs4XdLw.dpuf