What is Blockchain? by Sagar Manne, CTO of CoreCompete.
19 Industries the Blockchain Will Disrupt include: banking & payments, cyber security, supply chain management, forecasting, insurance, IoT, private transport and ride sharing, cloud storage, charity, government, public benefits, healthcare, energy management, online music, retail, real estate, crowd funding, voting etc.
https://blockgeeks.com/guides/what-is-blockchain-technology/
The link gives step by step guide for beginners