Khipu accounting in ancient Peru.

  title={Khipu accounting in ancient Peru.},
  author={Gary Urton and Carrie J Brezine},
  volume={309 5737},
Khipu are knotted-string devices that were used for bureaucratic recording and communication in the Inka Empire. We recently undertook a computer analysis of 21 khipu from the Inka administrative center of Puruchuco, on the central coast of Peru. Results indicate that this khipu archive exemplifies the way in which census and tribute data were synthesized, manipulated, and transferred between different accounting levels in the Inka administrative system. 

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