One of the original developers of WWW along with Tim Berners-Lee. The two were colleagues at CERN where the WWW was born. Cailliau, along with Nicola Pellow, also created the first web browser for the Macintosh system called MacWWW (also known as Samba). The program was sold for 50 European Currency Units making it the first commercial web software.
Robert Cailliau has also designed the logo of the World Wide Web. At the first international WWW Conference in 1994, all six inductees were presented a Chromachron watch with the logo.
The email message in which Marc Andreessen announced the release of NCSA X Mosaic browser hasn't been lost in time. It still exists! Though there were other web browser before it, Mosaic is generally credited to have made the "WWW explosion". [more...]