Old Turkic, Orkhon Runic

Orkhon Runic is one of the oldest writing systems in the world. It was used by the ancient Turkic people to write their language. The system is based on the Orkhon alphabet, which was used to write the Old Turkic language. The Orkhon alphabet is thought to be derived from the Greek alphabet. The Orkhon writing system was used to write a variety of texts, including inscriptions, religious texts, and documents. The system was also used to write Old Turkic poetry. The Orkhon writing system is no longer used, but it is still studied by scholars.