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WAI: Strategies, guidelines, resources to make the Web accessible to people with disabilities

WAI Technical Papers

Introduction to "Inaccessibility of CAPTCHA" the letters 'captcha' difficult to read because skewed on complex background
Introduces the November 2005 W3C Working Group Note Inaccessibility of CAPTCHA W3C Note, which examines potential solutions to test that users are human, not software robots, in a way that is accessible to people with disabilities.
 
Accessibility Information for Specific Technologies
Links to 1999-2002 documents on accessibility and XML, CSS, SMIL, SVG, and HTML 4. More current information is available from the list of Techniques for WCAG 2.0, including HTML, XHTML, CSS, and scripting techniques.

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