Wrongly used the word "ligature" in an earlier post where I should have used "character" or simply "letter". According to Wikipedia A ligature "occurs where two or more graphemes or letters are joined as a single glyph." A grapheme is " the smallest unit of a writing system of any given language. Graphemes include alphabetic letters, typographic ligatures, Chinese characters, numerical digits, punctuation marks, and other individual symbols..." A glyph is "an elemental symbol within an agreed set of symbols, intended to represent a readable character for the purposes of writing." A phoneme is "one of the units of sound (or gesture in the case of sign languages, see chereme) that distinguish one word from another in a particular language." An allograph *" denotes any glyphs that are considered variants of a letter or other grapheme, like a number or punctuation."

• "Allographs have found use in humor and puns; a famous example of allographic humour is that of spelling fish ghoti."