blockchain
put simply is a decentralized publicly viewable ledger of all cryptocurrency transactions. examples of blockchain include bitcoin, steem, ethereum, cardano, and many more.
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Hi @markhalen , Welcome to hede by sharing your first entry! That entry definitely suits expressing the knowledge in a "friendly and simple way". Next entries shared by others under the topic could be more detailed so readers can follow and learn in an increasing detail. that is what dictionaries are good for.