Most of us assume that visitors to our Web pages can see the wonderful graphics we include. However, many users are visually impaired and use special programs to read text to them. Also, those who are color-blind might have problems navigating your site if you rely on color to convey information. Still other users are unable to use a mouse or may use a text-based Web browser called lynx, which has no pictures and uses the keyboard for navigation rather than a mouse. Accessible design helps students, faculty and staff with disabilities understand and use Web-based class materials more effectively as well.