WCAG terminology

There is a lot of terminology when it comes to WCAG and accessibility in general. Here are some explanations for common terms:

WCAG: Web Content Accessibility Guidelines. Developed through the W3C process. The WCAG documents explain how to make web content more accessible to people with disabilities.
WAI: The World Wide Web Consortium (W3C) Web Accessibility Initiative develops standards and support materials to help us understand and implement accessibility.
W3C: The World Wide Web Consortium (W3C) is an international community that develops open standards to ensure the long-term growth of the Web.