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on User-Mode Driver Framework User interface modeling User-subjective approach Z User Group Journal of Organizational and End User Computing Atari ST User Acorn User User intent User error User-defined function Attentive user interface User environment management User activity monitoring 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 Natural-language user interface Lead user Average revenue per user Reference and User Services Quarterly Browser user interfa