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Bitcoin comes in two forms. At Bitcoin Magazine, we refer to Bitcoin with a capital “B” as the network or blockchain, while bitcoin with a lowercase “b” represents the currency, or monetary unit of bitcoin. The network functions as a communication protocol, similar to the internet. While the internet allows different computers to transmit information, Bitcoin allows computing devices to transmit currency, or bitcoin. 

Related: Cryptocurrency | Blockchain | Satoshi Nakamoto | Bitcoin Mining | Proof of Work