Polkadot founder Gavin Wood released the initial Jam specification in a gray paper, discussing the content of future proposals for Polkadot. The gray paper defines Jam, which integrates Polkadot and Ethereum elements, provides a globally permissionless object environment, combines secure off-chain computing, and can run in parallel on a scalable node network. Jam introduces a decentralized hybrid system, builds smart contract functionality, and is mainly driven by the underlying architecture of Polkadot. Jam is permissionless, allowing anyone to deploy code as a service and pay for resources by purchasing and allocating core-time to guide code execution.