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
Eyesight to the Blind anthologies, such as "Allison Wonderland Anthology" (1994). The Who adapted the song for the 1969 rock opera album "Tommy". Roger Daltrey sings Williamson's lyrics set to new music, composed by Pete Townshend. It appears as the last track on the first side of the album; the original Track Records album cover uses the title "The Hawker", while on the record label it is listed as "Eyesight to the Blind". "Eyesight to the Blind (The Hawker)" or "The Hawker (Eyesight to the Blind)" is often found on later releases. Despite Townshend's new arrangement, the album credits read "Sonny Boy Williamson". For