There are many successful open source projects, but the World Wide Web project is obviously the largest one. The web is based on open source software: Linux servers, Firefox and WebKit browsers, Apache server software, Memcached, Varnish, PHP programming languages, Perl, Python, Ruby, WordPress web framework, Drupal, Ruby on Rails, Django, Joomla, MySQL, PostgreSQL, different NoSQL, BIND DNS server and much more. But it all began on April 30, 1993, when the European Organization for Nuclear Research made the historic decision to transfer the World Wide Web into the public domain (accounting stamped paper:
page 1 ,
page 2 ).

CERN employee Tim Berners-Lee wrote the world's first web server, website and browser, and URI, HTTP and HTML technologies were created at CERN. At first, CERN sold a browser for NeXT and Apple for 50 ECU per computer, and the source code of the editor / browser was 50,000 ECU (
price list ), but on April 30, 1993 they decided to make the World Wide Web free for everyone.
The source code of those programs are preserved
here .