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Quipus, also known as khipus or talking knots, were recording devices historically used in a number of cultures and particularly in the region of Andean South America.
Similar systems were used by the ancient Chinese and native Hawaiians, though this article specifically deals with the most familiar Inca system, and knotted string records are often generically referred to in English as quipus after the Inca term. A quipu usually consisted of colored, spun, and plied/waxed thread or strings made from cotton or camelid fiber. For the Inca, the system aided in collecting data and keeping records,...