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