The primary goal of Accessibility is to make certain that Information Systems can be used by people with disabilities. A properly implemented system will provide access to information to people that use assistive technologies and it will increase usability for everybody. This is due to the fact that most accessible rules one way or another make the system friendlier for use by all.
Accessibility techniques ensure equal access to information for disable and non disable users. Content and functionality can become fully accessible to people with one or more disabilities including visual, audio, kinetic, speech, and cognitive impairments.
To address these needs the accessibility guidelines are organized around four principles:
- Content must be perceivable.
- Interface elements in the content must be operable.
- Content and controls must be understandable.
- Content must be robust enough to work with current and future technologies.