Patent ID: 8896550

Claim:
A navigation system, comprising: a main unit; a first medium insertion port disposed on a front surface of the main unit, the first medium insertion port through which a first portable recording medium is loaded into or unloaded from the main unit; a second medium insertion port disposed on the front surface of the main unit, the second medium insertion port through which a second portable recording medium is loaded and unloaded; a display unit disposed on the front surface of the main unit, the display unit being movable between a closed position where the first and second medium insertion ports are covered and an opened position where the first and second medium insertion ports are exposed; a limitation section that limits movement of the display unit to the opened position; a removing section that removes limitation by the limitation section; and an operation section that receives an operation on the navigation system, wherein the removing section removes limitation by the limitation section when the operation section receives a special operation which is different from a normal operation, wherein the second portable recording medium stores map information and update information for displaying a move button on the display unit selectable to cause the display unit to move to the opened position and, when the second portable recording medium stores the update information, the limitation section limits the functionality allocated to the move button to limit the movement of the display unit to the opened position, wherein a position of the first medium insertion port on the front surface of the main unit is different from a position of the second medium insertion port, and wherein the display unit is movable among the closed position where both the first medium insertion port and the second medium insertion port are covered, a semi-opened position where only the second medium insertion port is covered by the display unit, and the opened position where both the first medium insertion port and the second medium insertion port are exposed.