There are different types of blockchains that can be used depending on the purpose and audience. They can be public, private or a combination of the two. Understand the difference between blockchain types to learn and identify when you might want to use which one.
Learn more:
https://bitcoin.org/
https://ethereum.org/
https://www.hyperledger.org/
https://www.r3.com/corda-network/
https://ripple.com/
Watch the entire series: https://aka.ms/BeginnerSeriesToBlockchain
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