What is blockchain? l Fidelity - Fidelity Investments
https://www.fidelity.com/learning-center/trading-investing/what-is-blockchain
webJun 23, 2022 · Fidelity Investments. Key takeaways. Blockchain is a digital database that records and stores data across a network of computers. Blockchain can support many different applications, including cryptocurrencies, smart contracts, and supply-chain tracking.
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