Accessibility is a general term used to describe the degree to which a product (e.g., device, service, environment) is accessible by as many people as possible.
http://en.wikipedia.org/wiki/Accessibility

The Microsoft Accessiblity Web site provides information on the accessibility of Microsoft products and related resources including sections on Products and Resouces, Assisitve ...
http://www.microsoft.com/enable/

The Web Accessibility Initiative (WAI) of the World Wide Web Consortium (W3C). Vast quantities of information and resources for making the Web accessible to all.
http://www.w3.org/WAI

Web accessibility refers to the practice of making websites usable by people of all abilities and disabilities. When sites are correctly designed, developed and edited, all users ...
http://en.wikipedia.org/wiki/Web_accessibility

Creating accessible PDF documents with Adobe Acrobat 9 Pro . Creating accessible electronic documents requires more than specialized authoring tools; authors must begin with ...
http://www.adobe.com/accessibility/index.html

News, research, resources and support for health professionals, carers and the disability community.
http://www.accessibility.com.au/

U.S. Department of Health & Human Services. Improving the health, safety, and well-being of America
http://www.hhs.gov/Accessibility.html

Abstract. These guidelines explain how to make Web content accessible to people with disabilities. The guidelines are intended for all Web content developers (page authors and site ...
http://www.w3.org/TR/1999/WAI-WEBCONTENT-19990505/

Explains common web accessibility options on Windows, Mac and Linux machines.
http://www.bbc.co.uk/accessibility/

The Agency for Healthcare Research and Quality (AHRQ) is committed to making the information and resources on the Web sites that it sponsors accessible to the widest possible ...
http://www.ahrq.gov/accessibility.htm