Good control design in a system allows for the ease of use for new users (beginners) or complex, customizable use by seasoned users (experts). A new or inexperienced user of a system will benefit from less options, and a simple interface, whereas an expert user benefits from a customizable, flexible interface that offers more direct access to the functions they use most. Some systems, such as public kiosks, should assume that most users will be new ones, since anyone with expertise in that same environment probably has a more dedicated interface to use than the kiosk, e.g. an employee computer.