To provide an information processor which can prolong battery duration when the residual amount of a battery becomes a predetermined value or lower.

An information processor having a power source includes a processing part which executes a plurality of application programs, and a display part which displays the execution results of the application programs. When the residual amount of the power source becomes a threshold value or lower, the processing part terminates the application programs other than the application programs whose execution results are displayed on the display part among the plurality of application programs in execution according to the priority.