Human-computer interaction (HCI) is the study of how people interact with computers and other digital devices. It focuses on designing user-friendly interfaces that make it easier for users to accomplish tasks. HCI combines elements from computer science, cognitive psychology, and design to improve the overall user experience. The goal of HCI is to create systems that are efficient, effective, and enjoyable to use. This involves understanding user needs and behaviors, as well as testing and refining interfaces. By applying principles of usability and accessibility, HCI aims to ensure that technology is accessible to a wide range of users, including those with disabilities.