Economic Transactions
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quipu
It's called Quipus.
Because of the many things that appeared in a civilization that needed to be recorded.
There are several things that characterization a civilization. One is social structure, or a hierarchy organized by economic or social standards. Another would be culture, which encompasses that civilization's way of living, its creative endeavors, and more. Other characteristics include writing systems, government, and religion.
both helped improve record-keeping