c. 30th century BC to 1st century AD Parent systems ( Proto-writing ) Cuneiform Child systems none; apparently inspired Old Persian , influenced shape of Ugaritic ISO 15924 Xsux, 020 Direction Left-to-right Unicode alias Cuneiform Unicode range U+12000 to U+123FF (Sumero-Akkadian Cuneiform) U+12400 to U+1247F (Numbers) Note : This page may