Of all the characteristics of a civilization, in which category does the quipu belong? why?

Quipu (also spelled khipu), or talking knots,[1] are recording devices fashioned from strings historically used by a number of cultures in the region of Andean South America.[2] Knotted strings were used by many other cultures such as the ancient Chinese and native Hawaiians,[3] but such practices should not be confused with the quipu, which refers only to the Andean device.

A quipu usually consisted of cotton or camelid fiber strings. The Inca people used them for collecting data and keeping records, monitoring tax obligations, properly collecting census records, calendrical information, and for military organization.[4] The cords stored numeric and other values encoded as knots, often in a base ten positional system. A quipu could have only a few or thousands of cords.[5] The configuration of the quipus has been "compared to string mops."[6] Archaeological evidence has also shown the use of finely carved wood as a supplemental, and perhaps more sturdy, base to which the color-coded cords would be attached.[7] A relatively small number have survived.

Explanation:

he is known for discovering   the fossil of a female hominin australopithecine   known as "lucy" in the afar triangle region of hadar, ethiopia.

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