What term refers to the range of users for a particular product or system?

The term that refers to the range of users for a particular product or system is "user population." This term encompasses all the potential users who will interact with or benefit from the product, including their varying needs, preferences, and characteristics. Understanding the user population is essential in design and development processes, as it helps designers tailor the functionality, accessibility, and overall experience to meet the specific requirements of different user groups.

In contrast to this, user experience relates to how a user feels about their interaction with a product or system, emphasizing aspects like satisfaction and usability. User interface focuses on the specific points of interaction between the user and the product, such as buttons and menus, while user feedback refers to the opinions and evaluations provided by users regarding their experience with the product. Each of these terms plays a unique role in the design process but does not specifically denote the overall demographic of users, which is why user population is the most appropriate term in this context.