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e User Group Connection User interface modeling Z User Group User-subjective approach Atari ST User Attentive user interface User-Mode Driver Framework User activity monitoring User-defined function User environment management Persona (user experience) Console user interface Principles of user interface design Windows USER Unique user Multi-user MIMO Natural-language user interface Multi-user dungeon History of the graphical user interface Linux User and Developer Lead user First-time user experience Average revenue per user Concurrent user Web User Reference and User Services Quarterly End-user computing List of graphical user int