Accessibility is a general term used to describe the degree in which a system is usable by as many people as possible without modification. One meaning of accessibility specifically focuses on people with disabilities and their use of assistive devices.

 

The following describes four scenarios that are common accessibility concerns in modern website design:

• Visually impaired people using screen readers.
• Hearing impaired people using browsers with no sound.
• Physically impaired people.
• Color blind people.