Human-computer interaction (HCI) is the multidisciplinary field concerned with the design, evaluation, and implementation of interactive computing systems for human use. It examines the ways people interact with computers and designs technologies that let humans engage effectively with digital environments. HCI draws on knowledge from computer science, cognitive psychology, design, and social sciences to improve usability and user experience. Key focus areas include user interface design, accessibility, input devices, and methods for evaluating user interaction. The field has evolved in response to advances in technology, expanding from command-line interfaces to graphical user interfaces and, more recently, to natural user interfaces such as voice and gesture control.
