Shin (letter) languages, as follows: In the Arabic alphabet, ' is at the original (21st) position in Abjadi order. A letter variant ' takes the place of Samekh at 15th position. "" represents , and is the 13th letter of the modern alphabet order and is written thus: The Arabic letter "šīn" was an acronym for "something" ( "šayʾ(un)" ) meaning the unknown in algebraic equations. In the transcription into Spanish, the Greek letter "chi" (χ) was used which was later transcribed into Latin "x". According to some sources, this is the origin of "x" used for the unknown in the equations.
History of the Greek alphabet depending on their place in the word. Early printers, such as Aldus Manutius and Claude Garamond, attempted to imitate this, basing their printing on the writing of Greek scribes, producing a style text similar to modern italics. As Greece was occupied by the Ottoman Empire until the nineteenth century, early printers of (mostly ancient) Greek were mostly based in western Europe; few were Greek. This led to the adoption of writing conventions for Greek such as letter case influenced by printing and developments in the Latin alphabet. Cursive-inspired Greek print slowly disappeared during the eighteenth and nineteenth centuries in favour