The quipu was a series of knotted strings by which the Inca kept their administrative records though a moreesoteric function cannot be ruled out Used...
{"Image ImageDescription": "The quipu was a series of knotted strings by which the Inca kept their administrative records, though a moreesoteric function cannot be ruled out, Used by the Keepers of the Quipu they recorded such details as numbers of llamas and quantities of agricultural produce. Unusually, this example is attached to a wooden frame. Peru. Inca. 1430 1532 AD. (Photo by Werner Forman/Universal Images Group/Getty Images)"}