Human–computer interaction (HCI) is the process through which people
operate and engage with computer systems. Research in HCI covers the design
and the use of computer technology, which focuses on the interfaces between
people (users) and computers. HCI researchers observe how people interact with
computers and design technologies that allow humans to interact with computers
in new ways. These include visual, auditory, and tactile (haptic) feedback
systems, which serve as channels for interaction in both traditional
interfaces and mobile computing contexts. A device that allows interaction
between human being and a computer is known as a "human–computer interface
".