Definition
A user is an individual or entity that interacts with a system, application, or device to perform tasks or access information. Users can range from end consumers using a mobile app to administrators managing complex enterprise software. In practice, user interactions are typically mediated through an interface, whether graphical or command line, and involve inputting data, executing commands, or consuming outputs. Understanding user needs and behaviors is crucial for designing intuitive, efficient, and secure systems that meet business objectives. For instance, a customer using an e-commerce website to make a purchase is a user. This differs from a system account, which operates autonomously without direct human interaction. Concepts related to users are fundamental in domains like IT Fundamentals, Security+, and Network+.