Ao no exorcist tomo 04
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The document discusses the history and development of a new technology called blockchain. Blockchain was originally developed for the digital currency Bitcoin as a way to record transactions in a secure, decentralized manner without the need for a central authority. It has since been applied to other uses like digital identity, banking, and more due to its ability to securely and immutably store data and track the exchange of assets across many computers in a peer-to-peer network.
