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2) What is Blockchain?A blockchain is a distributed digital ledger that allows for the secure storage of data. By recording any kind of information—such as bank account transactions, the ownership of Non-Fungible Tokens (NFTs), or Decentralized Finance (DeFi) smart contracts—in one place, and distributing it to many different computers, blockchains ensure that data can’t be manipulated without everyone in the system being aware.，详情可参考一键获取谷歌浏览器下载
h->next = free_list[classno];，这一点在快连下载安装中也有详细论述
By the early 1960s, with ERMA on the scene, IBM's started to catch up.