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on Active users User Account Control Lazy user model Apple User Group Connection User interface modeling Closed user group User-Mode Driver Framework Unique user 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 Lead user Principles of user interface design First-time user experience User environment management Atari ST User Web User Windows USER Linux User and Developer Multi-user MIMO Concurrent user Persona (user experience) History of the graphical user interface Natural-language user interface Multi-user dungeon Vector-based graphical user interface MPEG user