Natural user interfaces (NUIs) are interfaces that allow humans to interact with computers using natural actions and gestures, such as touch, voice, and body movement. NUIs are used in many applications, such as virtual assistants, gaming, and education. Popular NUI platforms include Microsoft Kinect, Apple Siri, and Amazon Alexa. Check out our blog Blockchain is a distributed ledger technology that enables secure, transparent, and tamper-proof transactions. Blockchain is used in many applications, such as cryptocurrency, supply chain management, and voting systems. Popular blockchain platforms include Bitcoin, Ethereum, and Hyperledger.