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ror User Account Control User model Adaptive user interface Active users Object-oriented user interface Toolkits for user innovation Acorn User Z User Group User intent Lazy user model User-Mode Driver Framework Apple User Group Connection Unique user User interface modeling User–network interface Atari ST User Attentive user interface User-subjective approach User activity monitoring Journal of Organizational and End User Computing User-defined function Principles of user interface design Lead user User environment management Multi-user MIMO Persona (user experience) Console user interface First