NEM is a blockchain platform that was launched in 2015 and aimed to improve on the imperfections of other chains at the time. It was one of the first non-turing complete chains to offer user-defined tokens, namespaces, multisignature accounts, and a P2P reputation system. It introduced the proof-of-importance consensus mechanism to reward on-chain activity and deter wealth concentration. NEM's client, NIS, is written in Java. In 2021, NEM was hard forked by a team aiming to turn it into the world's leading payments platform for on-chain and off-chain media content.