A ledger is like a spreadsheet keeping track of which addresses own how many bitcoins. The BitcoinBitcoin is the first decentralized digital currency. It was created in 2009, by an anonymous founder or group of founders... More blockchainBlockchain is a type of database storing an immutable set of data, verifiable to anyone with access to it —through... is a distributedA distributed system is made of components that are running on different networked computers, which communicate and coordinate their actions... More, decentralized ledger. It shouldn’t be confused with “Ledger”, a company behind hardware wallets.