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work User-subjective approach Attentive user interface Z User Group User activity monitoring User-defined function Atari ST User User environment management Console user interface Persona (user experience) Unique user Principles of user interface design Windows USER Multi-user MIMO Natural-language user interface History of the graphical user interface Multi-user dungeon Linux User and Developer First-time user experience Concurrent user Lead user Web User Average revenue per user End-user computing List of graphical user interface elements Reference and User Services Quarterly Vector-based graphical user interface MPEG user data User System Interaction Browser user interface User-Managed A