Braille is printed letter for blind people to read with their fingers. Braille is composed of 6 dots (3 vertical, 3 horizontal) that are named in order of 1,2,3 (left) and 4,5,6 (right) from top to bottom. The combination of these six dots can make up 63 dot patterns. As a result, the braille is composed of many dot patterns and each of them have a meaning by the dot pattern. The 63 dot patterns are assigened to 13 initial sound, 14 final consonant sound, 21 vowel, 27 acronym letter, 7 abbreviated word, number, punctuation marks, etc..
Reference : Encyclopedia of Korean Culture, The Academy of Korean Studies
History of braille
"Make the world bright with only 6 points" Louis Braille(1809~1852) lost his sight when he was 4 years old. He accidently poked his eyes with an awl. Although he became blind, he learned to differentiate things by sound, smell, shape and touch. Despite his physical blindness, he didn't lose his inward eye to see the world. He learned history, geography, mathematics, and even music with the help of his parents and teachers not to fall in despair.
With his musical talents, he played piano, organ, violin and cello. Later on he performed a pipe organ in the church.
In 1829, studying at the Paris school of the blind, Braille invented the present braille system in a new way of indicating 26 alphabet letters with 6 points with the instrument of the awl which made him blind. This sort of system and effort later created the braille musical notation. Finally, the invention of 라피그래피? (1839) as a system of dots representing the shape of letters, made the blind to read with fingertips and the low vision people to read the points with his eyes. In this way, the low vision people were able to communicate with each other. In those days, Louis Braille's invention of the braille was not highly appraised but it became well known later as it gave light to the famous disabled people such as Helen Keller and Ray Charles.
In Republic of Korea, SongAm Park Doo-sung invented 6 points Korean Braille and published it on 4th November, 1926 as the name of 'Hunmaengjungeum'. In 1994 'Committe of Korea Braille Study' published 'Revised Unified Korean Braille,' and now various brailles such as Korean, ancient writings, mathematics, science, computer, music, Korean traditional music and foreign languages are commonly used. In present, the 'Korea Braille Regulation' has been commonly used, and it was published as a notice by the Ministry of Culture and Tourism on 9th June, 2006.