Cosmos (ATOM) is a network of independent, interconnected blockchains, often called the internet of blockchains. Its Cosmos SDK and Inter-Blockchain Communication protocol (IBC) let developers build their own chains and let those chains exchange tokens and data. ATOM is the native token of the Cosmos Hub, the first chain in the ecosystem, which launched in 2019 after development by Tendermint and the Interchain Foundation. ATOM holders can stake to secure the Hub, vote on governance proposals and earn staking rewards. Many well known projects, including dYdX and Osmosis, are built with Cosmos technology.