Today, almost all credit cards and debit cards without exception are made of plastic. Now, this seems to be common knowledge, but looking back at the history of bank card development, we can see that bank cards were not originally made of plastic. As the author mentioned earlier, credit cards have a history of about 100 years; if we include their predecessor, a card called "Frank" used for expenditures, credit cards have been around for nearly 130 years. Next, let's examine the history of credit during this period.