Sho (letter) was a survival or reintroduction of the archaic Greek letter San. It closely resembles, perhaps coincidentally, a letter of the Greek-based Carian alphabet which may have also stood for . The name "sho" was coined for the letter for purposes of modern computer encoding in 2002, on the basis of analogy with "rho" (ρ), the letter with which it seems to be graphically related. Ϸ was added to Unicode in version 4.0 (2003), in an uppercase and lowercase character designed for modern typography. Sho (letter) The letter (sometimes called sho or san) was a letter added to the Greek alphabet
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.