BitcoinHD is an experimental digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. BitcoinHD Core is the name of open source software which enables the use of this currency. What makes BitcoinHD special is that it makes use of hard drives to mine instead of expensive GPUs or ASICs to make mining more cost-effective and environmentally friendly.