OPERATION DEVICE

PROBLEM TO BE SOLVED: To provide an operation device for maintaining an operational environment for a specified application.SOLUTION: When accepting an input corresponding to the depressing operation of a home button (S13: YES), the control part of a tablet terminal displays a home screen pertinent to a display (S14), and starts the measurement of a display time (S15). When an application is started on the home screen, or when the home screen is switched to the other home screen, the control part of the tablet terminal determines that the display of the home screen has ended (S16: YES), and ends the measurement of the display time (S17). The control part integrates the display time of the home screen, and records the integrated time (S18). Then, the control part selects the home screen to be displayed in recovery from a suspend state on the basis of the display integration time of each home screen (S19).