Usability is designing web pages to be more effective, efficient, and satisfying to all. This include device independence.
Accessibility maximize number of people who can use the site. Addresses issues that people with disabilities at a disadvantage when their using the web and are usually transparent to people who don't need it.
This does not include device independence but groups particularly people who are older, using small screen device, and old or slow computers. In addition, you make web pages accessible without eyes, ears, motor control, perception of color and a mouse.
Web Accessibility provides equal opportunity more access to information.
Example:
- Books that are printed in braille can now be access by blind people through web
- Accessibility will also improve usability.
- More opportunity for disabled people to participate and interact through web.
People with disabilities can access the web via:
- Screen readers and magnifiers.
- Refreshable Braille display.
- Captioning software.
- Voice recognition software
- Switches and pointer stick.
- Touch screens.
Moreover, Web Accessibility overlaps with Usability because in order to be a website more usable it must be accessible to all people.
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