Ethereum is an open-source, public, blockchain-based distributed
computing platform featuring smart contract functionality. It provides a
decentralized Turing-complete virtual machine, the Ethereum Virtual
Machine (EVM), which can execute scripts using an international network
of public nodes. Ethereum also provides a cryptocurrency token called
"ether", which can be transferred between accounts and used to
compensate participant nodes for computations performed."Gas", an
internal transaction pricing mechanism, is used to mitigate spam and
allocate resources on the network.