This is a proposal to encode the Old Turkic script in the international character encoding standard Unicode. The script was published in Unicode Standard version 5.2 in October 2009. Old Turkic appears in stone inscriptions from the early 8c CE near the Orkhon River in Mongolia, and a slightly different version is found near the Yenisei River in Siberia in the later 8c CE. By the 9c CE, the script had been replaced by the Uyghur script.