Accessible Design for Users With Disabilities
http://www.useit.com/alertbox/9610.html

Nielsen, Jakob
Alertbox
1996

Abstract:

Making the Web more accessible for users with various disabilities is to a great extent a matter of using HTML the way it was intended: to encode meaning rather than appearance. As long as a page is coded for meaning, it is possible for alternative browsers to present that meaning in ways that are optimized for the abilities of individual users and thus facilitate the use of the Web by disabled users.