When was WWW invented?

Answer 1

While it is unclear exactly when the idea of inter-machine communication was first conceived, the first experiments in early computer networks took place in the 1940s.

The inception of the internet (ARPANET) was 1969.

The World Wide Web (WWW) as we know it, which is effectively the graphical front-end that (depending on your viewpoint) sits atop or is contained within the Internet, was created circa 1994.

Go to W3C and look for 'A Little History of the World Wide Web' for more detailed information.
The World Wide Web (WWW) was created in 1989 by Sir Tim Berners-Lee. Robert Cailliau later joined in 1990.

The name "World Wide Web" was given in May 1990. The first communication over the Internet between an HTTP client and HTTP server (now more popularly known as a web server) was successfully tested on December 25th, 1990. The first Web site was publicly announced on August 6th, 1991. The first web server in the US went online at the Stanford Linear Accelerator Center in December 1991. There were 26 web servers in the world by November 1992. By October 1993 there were over 200 web servers. Tim Berners-Lee founded the World Wide Web Consortium (also called 'W3C') in October, 1994. The W3C organization maintains the official standards for communication between web servers and Web Browsers.

More comments:

It was not actually invented. It more of just came about. Mainly hackers started it when accessing other computers.
Tim Berners-Lee invented the World-Wide Web in 1989, while at CERN, in Switzerland. The WWW is NOT the same thing as the Internet; it RIDES on the Internet (the Internet was started after the 2nd World War, the first project was called ARPANET)

Answer 1991