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User Account Control User-subjective approach Attentive user interface Z User Group User-Mode Driver Framework Atari ST User Object-oriented user interface User-defined function User interface modeling Persona (user experience) User environment management Unique user Console user interface User activity monitoring History of the graphical user interface Principles of user interface design Windows USER Multi-user MIMO Linux User and Developer First-time user experience Multi-user dungeon Natural-language user interface Lead user Web User Average revenue per user Reference and User Services Quarterly Concurrent user List of graphical user interface elements Browser user interface Vector-based graphical user in