French alphabet

Braille (/ˈbreɪl/ BRAYL, French: [bʁaj] ) is a tactile writing system used by blind or visually impaired people. 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. For blind readers, braille is an independent writing system, rather than a code of printed orthography.

Braille is named after its creator, Louis Braille, a Frenchman who lost his sight as a result of a childhood accident. In 1824, at the age of fifteen, he developed the braille code based on the French alphabet as an improvement on night writing. He published his system, which subsequently included musical notation, in 1829. The second revision, published in 1837, was the first binary form of writing developed in the modern era.

In Unicode, a script is a collection of letters and other written signs used to represent textual information in one or more writing systems. Some scripts support only one writing system and language, for example, Armenian. Other scripts support many different writing systems; for example, the Latin script supports English, French, German, Italian, Vietnamese, Latin itself, and several other languages. Some languages make use of multiple alternate writing systems and thus also use several scripts; for example, in Turkish, the Arabic script was used before the 20th century but transitioned to Latin in the early part of the 20th century. More or less complementary to scripts are symbols and Unicode control characters.

The unified diacritical characters and unified punctuation characters frequently have the "common" or "inherited" script property. However, the individual scripts often have their own punctuation and diacritics, so that many scripts include not only letters but also diacritic and other marks, punctuation, numerals and even their own idiosyncratic symbols and space characters.

The close front rounded vowel, or high front rounded vowel, is a type of vowel sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is ⟨y⟩. Across many languages, it is most commonly represented orthographically as ⟨ü⟩ (in German, Turkish, Estonian and Hungarian) or ⟨y⟩ (in Danish, Norwegian, Swedish, Finnish and Albanian) but also as ⟨u⟩ (in French and Dutch and the Kernewek Kemmyn standard of Cornish); ⟨iu⟩/⟨yu⟩ (in the romanization of various Asian languages); ⟨уь⟩ (in Cyrillic-based writing systems such as that for Chechen); or ⟨ү⟩ (in Cyrillic-based writing systems such as that for Tatar).

Short /y/ and long /yː/ occurred in pre-Modern Greek. In the Attic and Ionic dialects of Ancient Greek, front [y yː] developed by fronting from back /u uː/ around the 6th to 7th century BC. A little later, the diphthong /yi/ when not before another vowel monophthongized and merged with long /yː/. In Koine Greek, the diphthong /oi/ changed to [yː], likely through the intermediate stages [øi] and [øː]. Through vowel shortening in Koine Greek, long /yː/ merged with short /y/. Later, /y/ unrounded to [i], yielding the pronunciation of Modern Greek. For more information, see the articles on Ancient Greek and Koine Greek phonology.