How did the Inca communicate throughout their empire without having a written language?

A quipu/knot record, was one of the ways Incas had kept records to communicate. It was a simple and portable device, that achieved lots of precision and flexibility. The Incas didn't have an alphabetical communication system.

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one central belief of buddhism is often referred to as reincarnation -- the concept that people are reborn after dying. buddhism is a philosophy of life expounded by gautama buddha ("buddha" means "enlightened one"), who lived and taught in northern india in the 6th century b.c.