NEO has two native tokens, NEO (abbreviated symbol NEO) and NeoGas (abbreviated symbol GAS).GAS is the fuel token for the realization of NEO network resource control, with a maximum total limit of 100 million. The NEO network charges for the operation and storage of tokens and smart contracts, thereby creating economic incentives for bookkeepers and preventing the abuse of resources. The minimum unit of GAS is 0.00000001.