According to Wikipedia, Web Accessibility refers to the inclusive practice of removing barriers that prevent access to websites by people with disabilities. When sites are correctly designed, developed and edited, all users have equal access to information and functionality.
The World Wide Web Consortium (W3C) is an international community whose mission is to lead the Web to its full potential. They have published Four Principles of Accessibility: Perceivable, Operable, Understandable, and Robust (POUR). You can read more about those standards and you can contact W3C directly for more information. Continue reading Web Accessibility: Headings and Section Titles