Binary code practical applications such as computers, electric circuits, and more. The bit string is not the only type of binary code. A binary system, in general, is any system that allows only two choices such as a switch in an electronic system or a simple true or false test. Braille is a type of binary code that is widely used by the blind to read and write by touch, named for its creator, Louis Braille. This system consists of grids of six dots each, three per column, in which each dot has two states: raised or not raised. The different combinations
National Federation of the Blind v. Target Corp. the Web Content Accessibility Guidelines or the Architectural and Transportation Barriers Compliance Board's Section 508 Amendment to the Rehabilitation Act of 1973 standards, specifically encouraging Target to adopt the alt attribute for clickable images featured on the website. In its petition, NFB alleged that in one instance, when a blind user visiting this website selected an image of a Dyson vacuum cleaner using his or her tab key, the voice synthesizer on the computer would say "Link GP browse dot html reference zero six zero six one eight nine six three eight one eight zero seven two nine seven three