Quipu

Quipu are ancient Andean tools for recording information. They were most famously used by the Inca Empire.

Quipu are made from colored strings which are knotted in different ways. The strings are usually made from cotton or camelid fiber. The knots tied on quipu strings are often used to encode numbers.

The word "quipu" comes from a Quechua word meaning 'knot' or 'to knot'.

References

Category:Inca