Include appropriate ALT attributes for graphical elements on your page.
Here is what an image, with no ALT="text" tag, looks like with images turned off in your browser:



The bold text in the following example shows what an ALT attribute looks like in HTML:

<IMG SRC="banner.jpg" ALT= "Montgomery College,

 Montgomery County, Maryland - Home" BORDER=0>

Simulate the experience of using an audio-based browser:
On Internet Explorer, go to the Tools menu and select Internet Options/Advanced.
Turn off "Show Pictures", Apply, then Exit.

Try browsing at:
http://www.copia.net/
http://www.montgomerycollege.edu/Departments/artrv/
http://www.montgomerycollege.edu/Departments/auxiliaryservices/

All three of the above websites are beautiful when viewed through a regular browser, but inaccessible to people using screen readers or low-end technology. They all need the simple addition of ALT tags to make them accessible.