What is blockchain? 10 experts attempt to explain blockchain in 150 words or less

Blockchain technology is set to revolutionise the exchange of sensitive financial, commercial, legal and even medical data. But the information technology remains relatively obscure for the uninitiated. 10 experts took up the challenge of explaining blockchain in 150 words or less. To summarise: a blockchain is a large decentralised, immutable accounting ledger that facilitates peer-to-peer value exchange between two parties without the use of a trusted intermediary such as a bank. The many definitions collected by the Comparitech site compete with this definition.