WWW or W3C are acronyms for World Wide Web Consortium, which is the international standards organization for the web.
It currently has approximately 476 members and was created by Tim Berners-Lee. Members are organizations that maintain staff with the objective of working together in the development of standards for the web aka world wide web.
Additionally, the organization offers education and outreach while developing software and services as a forum for discussions about the World Wide Web.
In 1994, Tim Berners-Lee resigned from the European Organization for Nuclear Research. Berners-Lee created the organization at Massachusetts Institute of Technology Laboratory for Computer Science (MIT/LCS) supported by the European Commission and Defense Advanced Research Projects Agency aka DARPA, whom created ARPANET, which is one of the predecessors to the Internet.