Shin (letter)
Shin (also spelled Šin (šīn) or Sheen) is the twenty-first letter of the Semitc languages, including Phoenician šīn 𐤔, Hebrew šīn (ש or שׁ), Aramaic šīn 𐡔, Syriac šīn ܫ, and Arabic sīn س . Its sound is a voiceless sibilant, [ʃ] or [s]. The Phoenician letter gave rise to the Greek Sigma (Σ) (which in turn gave and Cyrillic С), the Hebrew letter Sin שׂ (also can be spelled Seen) and the letter Sha in the Glagolitic and Cyrillic scripts (Ш).
Shin (letter) Media
Proto-Canaanite letter shin
The letter Shin in Paleo-Hebrew
The rapid evolution of kaf, mem, shin from the 13th-8th c are especially helpful to date "les écritures phéniciennes archaïques."
