Chorded keyboard (a writing system for the blind) uses either 6 or 8 tactile 'points' from which all letters and numbers are formed. When Louis Braille invented it, it was produced with a needle holing successively all needed points in a cardboard sheet. In 1892, Frank Haven Hall, superintendent of the Illinois Institute for the Education of the Blind, created the Hall Braille Writer, which was like a typewriter with 6 keys, one for each dot in a braille cell. The Perkins Brailler, first manufactured in 1951, uses a 6-key chord keyboard (plus a spacebar) to produce braille output, and has been
American Council of the Blind American Council of the Blind The American Council of the Blind (ACB) is a nationwide organization in the United States. It is an organization mainly made up of blind and visually impaired people who want to achieve independence and equality (although there are many sighted members with common aims). The American Council of the Blind was formed out of the dissolution of the Braille Free Press Association in 1961. Braille Free Press had been set up in 1959 and had probably been the widest-read publication for the blind. It was highly critical of the American Foundation for the Blind, and