Braille is a tactile writing system used by people who are visually impaired, including people who are blind, deafblind or who have low vision. It can be read either on embossed paper or by using refreshable braille displays that connect to computers and smartphone devices. Braille can be written using a slate and stylus, a braille writer, an electronic braille notetaker or with the use of a computer connected to a braille embosser.
A keyset or chorded keyboard is a computer input device that allows the user to enter characters or commands formed by pressing several keys together, like playing a "chord" on a piano. The large number of combinations available from a small number of keys allows text or commands to be entered with one hand, leaving the other hand free. A secondary advantage is that it can be built into a device that is too small to contain a normal-sized keyboard.
Louis Braille was a French educator and inventor of a reading and writing system for use by people who are visually impaired. His system remains virtually unchanged to this day, and is known worldwide simply as braille.
The Moon System of Embossed Reading is a writing system for the blind, using embossed symbols mostly derived from the Latin script. It is claimed by its supporters to be easier to understand than braille, though it is mainly used by people who have lost their sight as adults, and thus already have knowledge of the shapes of letters.
The subject of blindness and education has included evolving approaches and public perceptions of how best to address the special needs of blind students. The practice of institutionalizing the blind in asylums has a history extending back over a thousand years, but it was not until the 18th century that authorities created schools for them where blind children, particularly those more privileged, were usually educated in such specialized settings. These institutions provided simple vocational and adaptive training, as well as grounding in academic subjects offered through alternative formats. Literature, for example, was being made available to blind students by way of embossed Roman letters.
New York Point is a braille-like system of tactile writing for the blind invented by William Bell Wait (1839–1916), a teacher in the New York Institute for the Education of the Blind. The system used one to four pairs of points set side by side, each containing one or two dots. The most common letters are written with the fewest points, a strategy also employed by the competing American Braille.
Night writing is the name given to a form of writing invented by Charles Barbier as one of a dozen forms of alternative writing presented in a book published in 1815: Essai sur Divers Procédés D'Expéditive Française, Contenant douze écritures différentes, avec une Planche pour chaque procédé. The term does not appear in the book, but was later applied to the method shown on Plate VII of that book. This method of writing with raised dots that could be read by touch was adopted at the Institution Royale des Jeune Aveugles in Paris.
The Perkins Brailler is a "braille typewriter" with a key corresponding to each of the six dots of the braille code, a space key, a backspace key, and a line space key. Like a manual typewriter, it has two side knobs to advance paper through the machine and a carriage return lever above the keys. The rollers that hold and advance the paper have grooves designed to avoid crushing the raised dots the brailler creates.
William Bell Wait (1839–1916) was a teacher in the New York Institute for the Education of the Blind who invented New York Point, a system of writing for the blind that was adopted widely in the United States before the braille system was universally adopted there. Wait also applied the New York Point principles to adapt them for use in over 20 languages, created a form of New York Point to notate music, and invented a number of devices to better type and print embossed material for the visually impaired.
Tactile signing is a common means of communication used by people with deafblindness. It is based on a sign language or another system of manual communication.
Unified English Braille Code is an English language Braille code standard, developed to permit representing the wide variety of literary and technical material in use in the English-speaking world today, in uniform fashion.
Charles Barbier de la Serre was the inventor of several forms of shorthand and alternative means of writing, one of which became the inspiration for Braille.
A tactile alphabet is a system for writing material that the blind can read by touch. While currently the Braille system is the most popular and some materials have been prepared in Moon type, historically, many other tactile alphabets have existed:
The slate and stylus are tools used by blind persons to write text that they can read without assistance. Invented by Charles Barbier as the tool for writing letters that could be read by touch, the slate and stylus allow for a quick, easy, convenient and constant method of making embossed printing for Braille character encoding. Prior methods of making raised printing for the blind required a movable type printing press.
Braille technology is assistive technology which allows blind or visually impaired people to do common tasks such as writing, browsing the Internet, typing in Braille and printing in text, engaging in chat, downloading files, music, using electronic mail, burning music, and reading documents. It also allows blind or visually impaired students to complete all assignments in school as the rest of sighted classmates and allows them take courses online. It enables professionals to do their jobs and teachers to lecture using hardware and software applications. The advances of Braille technology are meaningful because blind people can access more texts, books and libraries and it also facilitates the printing of Braille texts.
A sighted child who is reading at a basic level should be able to understand common words and answer simple questions about the information presented. They should also have enough fluency to get through the material in a timely manner. Over the course of a child's education, these foundations are built on to teach higher levels of math, science, and comprehension skills. Children who are blind not only have the education disadvantage of not being able to see: they also miss out on the very fundamental parts of early and advanced education if not provided with the necessary tools.
English Braille, also known as Grade 2 Braille, is the braille alphabet used for English. It consists of around 250 letters (phonograms), numerals, punctuation, formatting marks, contractions, and abbreviations (logograms). Some English Braille letters, such as ⠡ ⟨ch⟩, correspond to more than one letter in print.
Frank Haven Hall was an American inventor and essayist who is credited with inventing the Hall braille writer and the stereographer machine. He also invented the first successful mechanical point writer and developed major functions of modern day typography with kerning and tracking.
A braille e-book is a refreshable braille display using electroactive polymers or heated wax rather than mechanical pins to raise braille dots on a display. Though not inherently expensive, due to the small scale of production they have not been shown to be economical.
Louis Braille's original publication, Procedure for Writing Words, Music, and Plainsong in Dots (1829), credits Barbier's night writing as being the basis for the braille script. It differed in a fundamental way from modern braille: It contained nine decades (series) of characters rather than the modern five, utilizing dashes as well as dots. Braille recognized, however, that the dashes were problematic, being difficult to distinguish from the dots in practice, and those characters were abandoned in the second edition of the book.
