Geometric Shapes is a Unicode block of 96 symbols at code point range U+25A0-25FF.
Combining Diacritical Marks is a Unicode block containing the most common combining characters. It also contains the character "Combining Grapheme Joiner", which prevents canonical reordering of combining characters, and despite the name, actually separates characters that would otherwise be considered a single grapheme in a given context.
Phonetic Extensions is a Unicode block containing phonetic characters used in the Uralic Phonetic Alphabet, Old Irish phonetic notation, the Oxford English dictionary and American dictionaries, and Americanist and Russianist phonetic notations. Its character set is continued in the following Unicode block, Phonetic Extensions Supplement.
Arabic Supplement is a Unicode block that encodes Arabic letter variants used for writing non-Arabic languages, including languages of Pakistan and Africa, and old Persian.
In CJK computing, graphic characters are traditionally classed into fullwidth and halfwidth characters. With fixed-width fonts, a halfwidth character occupies half the width of a fullwidth character, hence the name.
Cyrillic Extended-B is a Unicode block containing Cyrillic characters for writing Old Cyrillic and Old Abkhazian, and combining numeric signs.
Arabic Presentation Forms-A is a Unicode block encoding contextual forms and ligatures of letter variants needed for Persian, Urdu, Sindhi and Central Asian languages. The presentation forms are present only for compatibility with older standards such as codepage 864 used in DOS, and are typically used in visual and not logical order.
Arabic Presentation Forms-B is a Unicode block encoding spacing forms of Arabic diacritics, and contextual letter forms. The presentation forms are present only for compatibility with older standards, and are not currently needed for coding text.
Syriac is a Unicode block containing characters for all forms of the Syriac alphabet, including the Estrangela, Serto, Eastern Syriac, and the Christian Palestinian Aramaic variants. It is used in Literary Syriac, Neo-Aramaic, and Arabic among Syriac-speaking Christians. It was used historically to write Armenian, Persian, Ottoman Turkish, and Malayalam.
Hiragana is a Unicode block containing hiragana characters for the Japanese language.
Katakana is a Unicode block containing katakana characters for the Japanese and Ainu languages.
Katakana Phonetic Extensions is a Unicode block containing additional small katakana characters for writing the Ainu language, in addition to characters in the Katakana block.
Byzantine Musical Symbols is a Unicode block containing characters for representing Byzantine-era musical notation.
Tai Viet is a Unicode block containing characters for writing the Tai languages Tai Dam, Tai Dón, and Thai Song.
Inscriptional Pahlavi is a Unicode block containing monumental inscription characters for writing the Middle Persian language.
Old Italic is a Unicode block containing a unified repertoire of the three stylistic variants of pre-Roman Italic scripts.
Imperial Aramaic is a Unicode block containing characters for writing Aramaic during the Assyrian and Achaemenid Persian Empires.
Avestan is a Unicode block containing characters devised for recording the Zoroastrian religious texts, Avesta, and was used to write the Middle Persian, or Pazand language.
Psalter Pahlavi is a Unicode block containing characters for writing Middle Persian. The script derives its name from the "Pahlavi Psalter", a 6th- or 7th-century translation of a Syriac book of psalms.
Old Hungarian is a Unicode block containing characters used for writing the Old Hungarian alphabet, an obsolete script which was used to write Hungarian during the medieval period.
