See also: https://en.wikipedia.org/wiki/Quipu

and

https://en.wikipedia.org/wiki/Maya_codices

"Bishop De Landa, a Franciscan monk and conquistador during the Spanish conquest of Yucatán, wrote: "We found a large number of books in these characters and, as they contained nothing in which were not to be seen as superstition and lies of the devil, we burned them all, which they (the Maya) regretted to an amazing degree, and which caused them much affliction." Only three extant codices are widely considered unquestionably authentic."