The History and Evolution of the Dollar Currency
TLDR The dollar currency originated from the term "Thaler" and spread to various countries due to the circulation of Dutch and Spanish dollars. The United States adopted the term "dollar" based on the silver content of Spanish dollar coins, while other countries adopted it due to being British colonies and the process of decimalization.
Timestamped Summary
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The currency in the United States is the dollar, which is also the name of the currency in over 20 other countries.
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The rise of money as a fungible means of exchange for goods and services was tied to the use of precious metals such as silver and gold, which were easy to divide and had guaranteed size and purity.
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The term "Thaler" morphed into "Dollar" and spread to Scandinavia, England, and the Netherlands, with other countries also adopting the term for their silver coins; the United States adopted the word "dollar" for its currency due to the circulation of Dutch and Spanish dollars in the early Americas.
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The United States adopted the term "dollar" for its currency based on the silver content of Spanish dollar coins, while other countries adopted the term due to being British colonies and the process of decimalization.
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The British pound used to be divided into shillings and pence, while the US dollar became associated with a decimalized currency and many Commonwealth countries chose the name dollar when they moved to a decimalized currency to distinguish it from the pound.
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The US and Canada are the only countries that call 5 cent coins nickels, and the United States still has a paper $1 note despite attempts to circulate dollar coins.
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The dollar sign has two variants, one with a vertical line and another with two vertical lines, with the latter falling out of use and not available in the Unicode character set on computers.