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
The Central Library for the Blind, Visually Impaired and Handicapped (Israel) Grünthal, translated books to Braille. In 1959 the library started also producing audio cassettes. In 2004 the effort to convert the audio cassettes, which were produced until that point, to CD format began, alongside producing new books in CD audio format. The library nowadays (2012) produces CDs, Braille books, and large print books. The Central Library for the Blind, Visually Impaired and Handicapped (Israel) The Central Library for the Blind, Visually Impaired and Handicapped (Israel) (Hebrew: הספרייה המרכזית לעיוורים, כבדי ראיה ומוגבלים) supplies people who cannot read books, for various disabilities, with books which are suitable for them, either in