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ach Acorn User User interface modeling User error Journal of Organizational and End User Computing Z User Group User intent User-defined function Atari ST User Attentive user interface User activity monitoring User environment management Principles of user interface design Unique user Persona (user experience) Windows USER Console user interface First-time user experience Linux User and Developer Multi-user dungeon Web User History of the graphical user interface Multi-user MIMO Concurrent user Lead user Natural-language user interface Average revenue per user Reference and User Services Quarterly Browser user interface End-user computing MPEG user data User-Managed Access List of graphical user interface