A method and system for determining an energy-efficient operating point of the platform or system. By a theft deterrent device according to the invention, there is provided an anti theft technology which contains the possibility for recycling the articles as a sales object again by neutralising the active substance if the articles are found again. A third gate structure is provided in a peripheral circuit region and includes a second conductive layer pattern, a third dielectric layer pattern including opening portions on the second conductive layer pattern, and a second gate electrode including a concavo-convex portion at an upper surface portion thereof and a third metal silicide pattern. The memory cell includes a gate insulator stack formed above the channel region, and a gate to connect to a word line. The substrate includes a notch portion corresponding a region facing the first display region with the first corner portion provided therebetween. The plunger has an extended position when the switch is in its first position and the blade engages the engine, wherein the plunger blocks movement of the shift mechanism into its reverse position, and a retracted position when the switch is in its second position and the blade disengages the engine, wherein the plunger does not block movement of the shift mechanism into its reverse position.