original_query: What are some examples of historical systems that provided the functions of money?
query: What are some examples of historical systems that provided the functions of money?
answer: Historical systems that functioned as money include livestock, grain, cowrie shells, beads, clay tokens representing claims on stored goods, bronze in various forms (rough bronze, measured bronze bars, coins), gold, silver, copper, tally sticks, promissory notes, bills of exchange, and paper money.