bitcoin για αρχάριους
http://sanakirja.kronman.fi/index.php?title=Are_You_Getting_the_Most_Out_of_Your_bitcoin_για_αρχάριους%3F_58078
Bitcoin is an electronic money which runs free of any type of central control or the oversight of banks or federal governments. Instead it relies upon peer-to-peer software as well as cryptography.