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bject-oriented user interface User-Mode Driver Framework User intent Active users Acorn User Z User Group Unique user Apple User Group Connection Lazy user model User–network interface User interface modeling Atari ST User User-subjective approach Attentive user interface Journal of Organizational and End User Computing User-defined function User activity monitoring User environment management First-time user experience Console user interface Persona (user experience) Windows USER Lead user Multi-user MIMO Web User Principles of user interface design Linux User and Developer Concurrent user Natural-language user interface History of the graphical user in