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e approach Z User Group User error Journal of Organizational and End User Computing User intent Atari ST User User interface modeling User-defined function Attentive user interface User environment management Principles of user interface design Unique user Persona (user experience) User activity monitoring 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 Lead user Natural-language user interface Concurrent user Average revenue per user Reference and User Services Quarterly Browser user interface End-user computing