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