a term used to refer to the increasingly pervasive availability of computational processing in the world around us
the quality of an interactive computer system with respect to ease of learning, ease of use, and user satisfaction
an enumeration of the complete course of events that can take place in response to some user input; the case specifies all possible interactions between the user and the system
Many human activities incorporate computer applications. In human-computer interaction (HCI), the terms useand users are applied to the common properties of computer applications in work activity, and to the people who use computer applications as part of their daily practice. These terms are somewhat unfortunate, as the people rarely construe their own activity as computer use per se or see themselves primarily as users of computer equipment.
the physical representations and procedures that are provided for viewing and interacting with the system functionality.
user interface prototype
an operational version or mock-up of a system that supports interaction between the user and the system that is used for user testing and iterative design