One lies on the counter of an apothecary in Rivers
One lies on the counter of an apothecary in Riverside Scenes at Qingming. Its name is derived from a word meaning Òtable sprinkled with sand or dustÓ because the first version of one used by the Babylonians were like that. The quipu of the Incas used (*) string, the Russian schoty has wires that are bulged upward in the center, and the Roman ones use grooves in tablets. The Chinese suanpan can handle decimal and hexadecimal, while the Japanese soroban that has two beads less can only count in decimal. FTP, name this counting device whose most well-known version consists of beads on wires set in a wooden frame. 
One lies on the counter of an apothecary in Riverside Scenes at Qingming.
abacus 