The World Wide Web was invented in 1990 by Tim Berners-Lee and Robert Cailliau while they were working at CERN, the European Organization for Nuclear Research. Tim Berners-Lee invented both HTML and HTTP, the core technologies used to request and transmit web pages on the internet. The World Wide Web makes retrieving information from the massive amount available on the internet easy and quick by allowing resources to be identified by URLs and interconnected through hyperlinks. It contributed greatly to creating a global database of information and simplifying access to content in any format from a wide range of devices.