structural:scholar_edition, linguistic:translation, structural:reformatting
Digital or electronic

The development of computer technology in the second part of the twentieth century allowed money to be represented digitally. By 1990, in the United States all money transferred between its central bank and commercial banks was in electronic form. By the 2000s most money existed as digital currency in bank databases. In 2012, by number of transaction, 20 to 58 percent of transactions were electronic (dependent on country).

Anonymous digital currencies were developed in the early 2000s. Early examples include Ecash, bit gold, RPOW, and b-money. Not much innovation occurred until the conception of Bitcoin in 2008, which introduced the concept of a decentralised currency that requires no trusted third party.