Dr. K.Y. Chen's Laboratory - Oracle Bone Inscription
The Five Original Writing Systems
Only five independent writing systems have been produced in the entire human history. Sumerian, Egyptian, Harappan, Mayan, and Chinese. Among them only Chinese has survived into modern age. All others have long since ceased to be functional. From Egyptian and Sumarian, the proto-Canaanite was developed in 1750 BC and became precursor of all the alphabetic languages.