… when asked why Robert Cailliau wasn’t credited with co-creating the Web, Berners-Lee said this was because he hadn’t.
“Robert didn’t invent it. I invented it by myself, and coded it up on a NeXT, but Robert was the first convert to it, and a massive supporter,” he explained.  “He got resources together at CERN, helped find students, gave talks. He also later wrote some code for a Mac browser called Samba. He also put a lot of energy into persuading the CERN directorate that CERN should declare that it would not charge royalties for the WWW, which it did in April 1993.”

Web inventor Berners-Lee: …  By Iain Thomson. The Register

See also: Birth of the World Wide Web Netvalley.com