many Andean peoples used an object called a "khipu" (also spelled "quipu" and pronounced "key-poo") to record and communicate information. Khipus were made with cords or strings with knots tied ...

Because the strings are arranged vertically ... how to read the information recorded on quipus, much less record information themselves. Among the Inca, these individuals were known as ...

While much of the world used stone tablets or other media that didn’t survive the centuries, the Incas used something called quipu which encoded numeric data in strings using knots. Now the ...