EOS is essentially a decentralized blockchain “operating system”. It is called a blockchain operating system because its offers a construct similar to the operating system of a computer to run applications (DApps) that are built upon it. The robust infrastructure technology of EOS ensures efficiency, usability and scalability by horizontally scaling the decentralized applications on it (think of it as having multiple cores in a CPU instead of only one). EOS aims to eliminate transaction fees and process millions of transactions per second. EOS is the token currently being distributed on the Ethereum blockchain while the EOS blockchain is still under development. When the EOS blockchain is launched, the tokens can be redeemed by investors and then traded or used by DApps developers to pay for their DApps to be on the EOS blockchain.