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face modeling Unique user User-Mode Driver Framework Closed user group User-subjective approach User–network interface Attentive user interface User-defined function User activity monitoring Z User Group Journal of Organizational and End User Computing Console user interface User environment management Lead user Principles of user interface design First-time user experience Web User Atari ST User Persona (user experience) Linux User and Developer Windows USER Multi-user MIMO Concurrent user History of the graphical user interface Natural-language user interface Multi-user dungeon Vector-based graphical use