BTC

http://psicolinguistica.letras.ufmg.br/wiki/index.php/20_Resources_That'll_Make_You_Better_at_ΤΙ_ΕΙΝΑΙ_ΤΟ_BITCOIN

Bitcoin is an electronic money which runs without any central control or the oversight of financial institutions or federal governments. Rather it counts on peer-to-peer software and also cryptography.