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Human Computer Interaction
Definition: Human-computer interaction (HCI), alternatively man-machine interaction (MMI) or computer-human interaction (CHI) is the study of interaction between people (users) and computers. It is often regarded as the intersection of computer science, behavioral sciences, design and several other fields of study. Interaction between users and computers occurs at the user interface (or simply interface), which includes both software and hardware, for example, general purpose computer peripherals and large-scale mechanical systems, such as aircraft and power plants.