It is precisely 20 years (and 2 days) since a British computer scientist named Timothy Berners-Lee proposed to his peers at CERN a way to publish and navigate information on a world wide web of servers. Genius.
Though the true Birthday of the Web is on 25th December, and an international network of servers and computers had existed for some time beforehand, the foresight that TBL had of a public and world wide presentation of browsable, clickable information changed the world. E-commerce has changed the retail industry forever whilst other businesses have changed to gather customers and attention using the web and social networking. The fact that you are lucky enough to be reading this post is thanks to the WWW and the proposal that Berners-Lee wrote 20 years ago today (minus two days).
If you are a computer scientist you may enjoy reading the original document: WorldWideWeb: Proposal for a HyperText Project.
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.