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
Missouri School for the Blind advantage has been derived from the use of the system of point writing known as Braille." It further noted that "in music its excellency is especially manifest." In a meeting of the Board of Trustees on 30 June 1863, singular praise was bestowed upon the music teacher Robyn: "This Institution is the pioneer of the Braille system in this country, and Mr. Robyn certainly deserves the honorable title of benefactor of the blind." The Missouri School was the first educational institution in the United States to recognize braille as the primary system for blind persons' instruction. The braille system had