On August 6th 1991, Tim Berners-Lee, posted a summary of the World Wide Web concept in the alt.hypertext newsgroup.  It was a message that laid the groundwork for a new technology that revolutionized commerce and communication.   You might also want to blame the WWW for spam but, no, the first spam message was in 1978 when Gary Thuerk,  a marketing guy for Digital Equipment Corporation, annoyed 400 of the 2600 people on ARPAnet with an ALL CAPS message promoting a DEC seminar.

Back to the Web and more positive history; while at CERN, Berners-Lee had been researching a better method for physicists to share information, without having the same hardware and software.  

HyperText is a way to link and access information of various kinds as a web of nodes in which the user can browse at will. Potentially, HyperText provides a single user-interface to many large classes of stored information such as reports, notes, data-bases, computer documentation and on-line systems help. We propose the implementation of a simple scheme to incorporate several different servers of machine-stored information already available at CERN, including an analysis of the requirements for information access needs by experiments.

I had a BBS back then.  It was pretty insular.   He called it HyperText, and it became what you now see as HTTP:// in your web browser.

Here is his alt.hypertext posting, courtesy of Google:
The WWW project merges the techniques of information retrieval and hypertext to make an easy but powerful global information system.

The project started with the philosophy that much academic information should be freely available to anyone. It aims to allow information sharing within internationally dispersed teams, and the dissemination of information by support groups.
The first browser ran on the NeXTStep operating system:



This is the first image posted to the Web, in 1992:


Yes, it is French parodic rock group Les Horribles Cernettes

By 1995, I had not only my own newsgroup but my own webpage which, in a precursor to blogging, was pretty much just about me.   It was basically a castle and an area outside the castle and by clicking on it you went to new sections where there were pictures, thoughts, downloads, etc.



Being free was instrumental in its success and it's one of the reasons why I think as time goes on we want to have all studies available for free, just like Berners-Lee wanted even then - not just pay-to-to-publish but free all the way around.  Baby steps.

Thanks, World Wide Web, for being 50% of the reason Science 2.0 is possible (the other half being people willing to read and write science this way) - enjoy the next 20 years.