A runtime system usually comprises a series of graphics pages that display on your computer screen(s) and provide a "window into the process." You can design your pages to provide your operators with control of an areaA large application can be visualized as a series of discrete sections or areas. Areas can be defined geographically (where parts of the plant are separated by vast distances) or logically (as discrete processes or individual tasks). (or all) of your plant. Your graphics pages can also display the status of your plant by using various graphical items known as objects.