Sugar is a graphical user interface (GUI developed for the $100 laptop (XO). The One Laptop Per Child (OLPC) Project designed the interface to be simple enough for a child with little computing experience. XO runs on the Fedora Core operating system and includes open source software, including games, a writing program, a drawing program, a basic calculator, a music composer and other child-friendly applications.
When XO boots up, the display features four views called Home, Friends, Neighborhood and Activity. A simple menu bar at the top of the screen helps the child navigate the interface, which includes a simple Web browser and networking program. Learning aids, child-friendly chat rooms and multi-user activities are available.