History of the Greek alphabet only required one. The history here is complicated, but basically "sāmekh" dropped out in certain dialects, and was reused to represent in others, while usage for the sound varied between "ṣādē" and "šin". The letter now known as sigma took its name from "sāmekh" but its form from "šin", while the letter San, which occurred in a few dialects only, took its name from "šin" but its place in the alphabet from "ṣādē". A further Greek letter of uncertain origin, sampi, is found occasionally, and may represent an affricate, such as . For the special case of zeta, see Zeta
History of the Greek alphabet for Semitic languages, and these "matres lectionis", as well as several Phoenician letters which represented consonants not present in Greek, were adapted according to the acrophonic principle to represent Greek vowels consistently, if not unambiguously. The Greek alphabet was developed by a Greek with first-hand experience of contemporary Phoenician script. Almost as quickly as it was established in the Greek mainland, it was rapidly re-exported, eastwards to Phrygia, where a similar script was devised. It was also exported westwards with Euboean or West Greek traders, where the Etruscans adapted the Greek alphabet to their own language, which eventually led to