Karim Lakhani, Harvard Business School professor and co-founder of the HBS Digital Initiative, discusses blockchain, an online record-keeping technology that many believe will revolutionize commerce. Lakhani breaks down how the technology behind bitcoin works and talks about the industries and companies that could see new growth opportunities or lose business. He also has recommendations for managers: start experimenting with blockchain as soon as possible. Lakhani is the co-author of the article “The Truth About Blockchain” in the January-February 2017 issue of Harvard Business Review.