Abstract: A PC includes: a desktop display management section causing a display device to display, among desktops, a main or sub desktop by switching between these desktops, the sub desktop being associated with the main desktop; and an application program execution process section executing application programs and displaying images on the main and sub desktops, the images being generated by execution of the application programs, respectively. The desktop display management section switches the main desktop to the sub desktop by a start instruction to start the application program of the image on the sub desktop.