And there are metal counting devices used for keeping financial records.

VOA: special.2009.08.17

The price of paper fell and created opportunity for record-keeping, which was very important because that's what finance is built-- you need financial records.

纸价下跌,从而使得纸质记录成为了可能，这点至关重要,因为这是金融立身之本-,人们需要财务记录。

耶鲁公开课 - 金融市场课程节选