Chinese abacus listed as world intangible cultural heritage (3/7)

Zhusuan, the Chinese traditional method of calculations using the abacus, is officially listed as an intangible cultural heritage at the 8th Annual UNESCO World Heritage Congress on December 4, 2013 in Baku, Azerbaijan. The abacus, called Suanpan in Chinese, is considered the world's most ancient computer. It has a history of more than 18 hundred years. [File photo/ CNSPHOTO]