Allograph

Distinct shapes of a written symbol ⟨g⟩ rendered with or without a looptail are allographs of each other In graphemics and typography, the term allograph is used of a glyph that is a design variant of a letter or other grapheme, such as a letter, a number, an ideograph, a punctuation mark or other typographic symbol. Graphemics In graphemics, an obvious example in the Latin alphabet (and many other writing systems) is the distinction between uppercase and lowercase letters. Allographs can vary greatly, without affecting the underlying identity of the grapheme. Even if the word "cat" is rendered as "cAt", it remains recognizable as the sequence of the three graphemes ⟨c⟩, ⟨a⟩, ⟨t⟩. Letters and other graphemes can also have significant variations that may be missed by many readers. The letter g, for example, has two common forms in different typefaces, and a wide variety in people's handwriting. A positional example of allography is the long s |ſ|, a symbol which was once widely used as a non-final allograph for the lowercase letter s. The Arabic script has particularly strong positional allography; Arabic letters have two to four allographs based on their position i