ISO/IEC 11581 applies to icons that are shown on a screen, that users can manipulate and interact with, and that represent data or computer system functions. ISO/IEC 11581-3 addresses only pointers. Pointers are icons that are logically attached to a physical input device, and that the user manipulates to interact with other screen elements, see (ISO/IEC 11581-1. This part describes user interaction with and appearance of pointers on the screen. It also specifies how pointers on a screen change appearance to give users feedback.