Computer interaction refers to the ways in which humans communicate and engage with computers and digital devices. This field studies how users interact with software, hardware, and interfaces, aiming to improve usability and user experience. Key components include input methods like keyboards and touchscreens, as well as output displays such as monitors and speakers. The goal of computer interaction is to create systems that are intuitive and efficient for users. This involves understanding user needs and behaviors, often utilizing principles from cognitive psychology and design. Effective computer interaction can enhance productivity and satisfaction in various applications, from mobile apps to websites.