Prehistoric ‘bookkeeping’ tokens continued long after invention of writing

An archaeological dig in southeast Turkey has uncovered a large number of clay tokens that were used as records of trade until the advent of writing, or so it had been believed. But the new find of tokens dates from a time when writing was commonplace -- thousands of years after it was previously assumed this technology had become obsolete. Researchers compare it to the continued use of pens in the age of the word processor.

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