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The khipu is an information processing and transmission device used mainly by the Inca empire and previous Andean societies. This mnemotechnic interface is one of the first textile computers known, consisting of a central wool or cotton cord to which other strings are attached with knots of different shapes, colors, and sizes encrypting different kinds of values and information. The system was widely used until the Spanish colonization that banned their use and destroyed a large number of thesedoi:10.5281/zenodo.4813494 fatcat:q7hkuzcmjfb6bffcjz23xsyc2i