Former recommendation from the W3C, which explains to developers and authors how to make Web content accessible to people with disabilities.

Official website for Section 508 of the US Rehabilitation Act.

Official standards and guidelines for Government of Canada Web sites, as part of the Treasury Board's "Common Look and Feel" initiative.

Official state guidelines. Readable format with an explanation and implementation tips for each item.

UK government guidelines for public sector websitesissued by the Central Office of Information.

A group of developers, led by Joe Clark, that worked on corrections for, and extensions to, the Web Content Accessibility Guidelines 1.0. Includes published errata, and links to independent reviews of their work.

A Publicly Available Specification from the British Standards Institution, in association with the Disability Rights Commission. [free download subject to some license conditions]

Recommendation from the W3C, which explains to developers and authors how to make Web content accessible to people with disabilities.