Blockchain

Blockchain is simply a chain of blocks which contains information. This technology was introduced in 1991 by a research team intending to timestamp documents so no one can backdate or tamper. As per the official definition, blockchain is a decentralized, distributed public immutable ledger, we will discuss more later under the distributed system. A single block contains data, hash, and the hash of the previous block.

https://www.savjee.be/videos/simply-explained/how-does-a-blockchain-work/
https://supplychainconsulting.in/blockchain-applications/
https://dashbouquet.com/blog/blockchain/blockchain-solutions-the-way-to-transform-your-business-processes
https://spacemesh.io/
Blockchain Architecture
https://thecontrol.co/on-the-scalability-of-blockchains-ec76ed769405