Writing for The Bind for Louis Braille in 1834

Since 1825, year in which Louis Braille devised system of embossed, blind people have a valid and effective tool to read, write, compose, or engage in information technology.

The braille system isn't a language, but an alphabet. With braille can represent letters, punctuation marks, numbers, the scientific name, mathematical symbols, music, etc.

Braille typically consist of cells in six points in relief, organized as an array of three rows by two columns, which are conventionally numbered top to bottom and from left to right.

The presence or absence of points allows encoding of symbols. 64 Different combinations are obtained through these six points. The presence or absence of point at each position determines what font it is. Since these 64 combinations are clearly insufficient, used special distinctive signs that, back to a combination of points, make a letter uppercase, italics, number, or musical note. Spanish Braille, lowercase letters, punctuation, most codes some words and some special characters are encoded directly in a cell, but capitalization and numbers are also represented with another symbol as a prefix.

There are codes to represent shorthand (generated with a machine that marks the points on a paper tape), and to represent Mathematical notations braille, also called mathematical code unified, and musicals.

With the introduction of information technology, braille was expanded to eight points, so that a single letter can be encoded with a single cell, a cell can represent any ASCII character code. The 256 possible combinations of the eight points are encoded according to the Unicode standard.

On the other hand, the introduction of the information access technologies has generated a need to establish new codes on computing and electronics published by the CBE in January 2009.

Braille can be reproduced using an iron and a punch, so that each point is generated from the back of the page, written in an image in reverse (as that is obtained by looking for a mirror), hand-made or printed with a typewriter braille, by a braille printer connected to a computer, or using a Braille device.