Abstract: A suspend and resume processing method for suspending and resuming a plurality of hardware states of program tasks is disclosed. In the suspend operation, a key code designated by the user is recognized to determine one of storage areas in which the hardware execution state of the target task is saved, and data of information on the task, such as the task, a key code designated by the user, a target storage area, and the number of resume operations, are stored in a look-up table. In the resume operation, a list of the data of the look-up table is displayed so that the user can easily select a target task to be resumed, the target task is determined by detecting data input by the user, and necessary data is loaded from the relevant storage area, and the number of resume operations is counted and the data of the look-up table is updated.