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ser interface 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 User activity monitoring Console user interface History of the graphical user interface Windows USER Principles of user interface design Multi-user MIMO First-time user experience Linux User and Developer Natural-language user interface Lead user Multi-user dungeon Web User Average revenue per user Concurrent user Reference and User Services Quarterly MPEG user data Browser user interface List of graphical user interface elements End-user computing Vector-based gra