Web and technology
W3C
Abbreviation for World Wide Web Consortium
In short and in plain language
The W3C is the group that works out the technical rules for the web.
These include the languages used to build and style web pages.
The rules for web content that all people can use also come from there.
Definition
The W3C is the body that develops technical standards for the web. These include HTML, CSS and the guidelines for accessible web content.