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