What are user interfaces in computer?

User interfaces are the access points where users interact with designs . They come in three formats: Graphical user interfaces (GUIs)—Users interact with visual representations on digital control panels. A computer’s desktop is a GUI. Voice-controlled interfaces (VUIs)—Users interact with these through their voices.

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Which is an example of tangible system?

They can represent items, people, activities and/or events, and look or feel similar to what they refer to. For example, a cup can be used as three-dimensional tangible symbol to represent the action: “drink”. A photograph of a cup can be used as a two-dimensional tangible symbol to also represent the action : “drink”.

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