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r User interface modeling User–network interface Attentive user interface Atari ST User User-subjective approach User activity monitoring User-defined function Journal of Organizational and End User Computing Principles of user interface design Lead user User environment management Console user interface Multi-user MIMO Persona (user experience) First-time user experience Windows USER Web User Linux User and Developer History of the graphical user interface Concurrent user Natural-language user interface Multi-user dungeon End-user computing Vector-based graphical user interface MPEG user data Reference and User Services Quarterly Browser user interfac