ARPANET adopted TCP/IP on January 1, 1983, and from there researchers began to assemble the “network of networks” that became the modern Internet. The online world then took on a more recognizable form in 1990, when computer scientist Tim Berners-Lee invented the World Wide Web. While it’s often confused with the Internet itself, the web is actually just the most common means of accessing data online in the form of websites and hyperlinks.
http://www.history.com/news/ask-history/who-invented-the-internet
As well as the World Wide Web, the Internet is used for such application as email, file sharing, online chat, phone and video calls, online gaming and more. Thanks to the increasing accessibility of the Internet, the popularity of the web has exploded over the last 10 years.
http://www.sciencekids.co.nz/sciencefacts/technology/internet.html
The World Wide Web is the collection of linked pages that are accessed using the Internet and a web browser. English physicist Sir Tim Berners-Lee is regarded as having invented the World Wide Web in 1989. Since then he has continued the development of web standards and other web related projects.
http://www.sciencekids.co.nz/sciencefacts/technology/internet.html
Although the World Wide Web is often referred to as the Internet, the two are not the same thing. The Internet is a huge network of networks that links computers together all over the world using a range of wires and wireless technologies.
http://www.sciencekids.co.nz/sciencefacts/technology/internet.html
The first website at CERN - and in the world - was dedicated to the World Wide Web project itself and was hosted on Berners-Lee's NeXT computer. The website described the basic features of the web; how to access other people's documents and how to set up your own server.
https://home.cern/topics/birth-web
Nikola Tesla toyed with the idea of a “world wireless system” in the early 1900s, and visionary thinkers like Paul Otlet and Vannevar Bush conceived of mechanized, searchable storage systems of books and media in the 1930s and 1940s.
http://www.history.com/news/ask-history/who-invented-the-internet
The birth of the web. Tim Berners-Lee, a British scientist at CERN, invented the World Wide Web (WWW) in 1989. The web was originally conceived and developed to meet the demand for automatic information-sharing between scientists in universities and institutes around the world.
https://home.cern/topics/birth-web
History of the World Wide Web. Before the World Wide Web the Internet really only provided screens full of text (and usually only in one font and font size). So although it was pretty good for exchanging information, and indeed for accessing information such as the Catalogue of the US Library of Congress, it was visually very boring.
http://www.nethistory.info/History%20of%20the%20Internet/web.html
The NeXT machine - the original web server - is still at CERN. As part of the project to restore the first website, in 2013 CERN reinstated the world's first website to its original address. On 30 April 1993 CERN put the World Wide Web software in the public domain. CERN made the next release available with an open licence, as a more sure way to maximise its dissemination.
https://home.cern/topics/birth-web
The first workable prototype of the Internet came in the late 1960s with the creation of ARPANET, or the Advanced Research Projects Agency Network. Originally funded by the U.S. Department of Defense, ARPANET used packet switching to allow multiple computers to communicate on a single network.
http://www.history.com/news/ask-history/who-invented-the-internet
when was the world wide web invented?
The World Wide Web was invented in 1989.   The World Wide Web was invented in 1989.