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