When the world’s first ever web server (http://info.cern.ch/) went live at CERN (the European Organisation for Nuclear Research) on the 24th of December, 1990, it marked the creation of one of the four essentials of the World Wide Web: HTML, web protocol, web browser, and web server. Tim Berners-Lee, the inventor of the World Wide Web, set up a NeXT computer at CERN as the first ever server. However, this web server was more of a small intranet for information sharing among CERN physicists rather than being “world wide”.
By 1991, several other web servers had been created, all located at CERN. By this time, it had been successfully tested that document retrieval could be performed from web servers on incompatible computer systems. However, since all the web servers were at CERN, the possibility of retrieving data from halfway across the world was questionable. To do so, a computer was set up with the help of Paul Kunz, a physicist at Stanford University. This server was located at the Stanford Linear Accelerator Center (SLAC) and by the end of 1991, it went live, becoming the first web server outside Europe.
What started from a single NeXT computer at a nuclear research lab in Europe has now grown into an indispensable part of the internet globally. A world without web servers means a world where information cannot be retrieved from any part of the world within an instant - essentially unimaginable. The millions of servers online are responsible for displaying website content by storing, preprocessing, and delivering the requested web pages to users. The sheer significance of this invention can be gauged by the fact that all data that are shared over the internet today are hosted on web servers. And while the first web server could only retrieve data from other servers located in CERN, today this retrieval can quickly be done across oceans and continents.