High Quality Content by WIKIPEDIA articles! San (uppercase ?, lowercase ?) was a letter of the Greek alphabet, appearing between Pi and Qoppa in alphabetical order, corresponding in position to the Phoenician Tsade Phoenician sade.png, but its name comes from Shin Phoenician sin.svg. It usually had a phonemic value of /s/, but eventually became disused in favour of sigma. The latest attested use is in the 6th century BC. With a somewhat different shape (which has been labelled "Tsan") the letter was also used in Arcado-Cypriot as [ts], replacing a previous labio-velar before a front vowel, where other dialects replaced it with Tau.