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innovation User intent Z User Group Apple User Group Connection Lazy user model User-Mode Driver Framework Unique user User interface modeling User–network interface User-subjective approach Attentive user interface Atari ST User User-defined function Journal of Organizational and End User Computing User activity monitoring Lead user Principles of user interface design User environment management Console user interface Multi-user MIMO Persona (user experience) Windows USER First-time user experience Web User Linux User and Developer History of the graphical user interface Concurrent user Natural-language user interface Multi-us