quipu
A recording device, used by the Incas, consisting of intricate knotted cords.
Among a cache of 21 quipus recovered from a house, probably that of the chief quipu keeper, seven are clearly related in a three-tier accounting hierarchy.
Where it comes from
Borrowed from Spanish quipu, from Quechua khipu (“knot”).
Adapted from the Wiktionary entry quipu (CC BY-SA 4.0).