S-comma is a letter which is part of the Romanian alphabet, used to represent the Romanian language sound, the voiceless postalveolar fricative (like sh in shoe). This letter however wasn't part of the early Unicode versions, which is why Ş (S-cedilla) is often used in digital texts in Romanian. S-comma was introduced only in Unicode 3.0 at the request of the Romanian national standardization body, but most computers today still don't have fonts compatible with it (computers with Microsoft… (More on S-comma)