TAPA BLANDA, LIBRO USADO, RECUERDA QUE UN % DE ESTA VENTA COLABORA CON FUNDACIONES QUE FOMENTAN LA LECTURA EN ZONAS VULNERABLES. Blockchain is the ingeniously simple technology behind Bitcoin. But it is much more than that. It is a public ledger to which everyone has access, but which no single person controls. It enables companies and individuals to collaborate with an unprecedented degree of trust and transparency. It is cryptographically secure, but fundamentally open. And soon it Will be everywhere.