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
Learning to read Learning to read Learning to read is the acquisition and practice of the skills necessary to understand the meaning behind printed words. For a fairly good reader, the skill of reading often feels simple, effortless, and automatic; however, the process of learning to read is complex and builds on cognitive, linguistic, and social skills developed from a very early age. Usually, in order to understand a text, it is necessary to understand the spoken language associated with that text. In this way, writing systems are distinguished from many other symbolic communication systems. Once established, writing systems on the whole change