The Ethereum Virtual Machine

The EVM is the part of Ethereum that handles smart contract deployment and execution.

The EVM has a stack-based architecture, works with a word size of 256 bits, and has these data components:

1) An immutable program code ROM, with the bytecode of the smart contract to be executed.

2) A volatile memory, initialized to zero.

3) A permanent storage, part of the Ethereum state, also zero-initialized.