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ective approach Acorn User Journal of Organizational and End User Computing User interface modeling User error Apple User Group Connection User intent Z User Group User-defined function Atari ST User User–network interface Attentive user interface Toolkits for user innovation Unique user User activity monitoring Principles of user interface design User environment management Persona (user experience) End-user computing Console user interface Windows USER First-time user experience Multi-user MIMO Multi-user dungeon History of the graphical user interface Natural-language user interface Lead user Concurrent user Average revenue per user Linux User and Developer Web User