An organic light-emitting display device includes a thin film transistor on a substrate, a protective layer and a planarization layer covering the thin film transistor, a pixel electrode connected to the thin film transistor, and a wall positioned on at least a portion of the pixel electrode. A logical volume identifier which is unique for the accessed logical volume is used for providing access. Responsive to the determination, when the symbol corresponding to the input data is included in the lower group, the first computation unit detects look-up table information corresponding to a subgroup that includes the symbol corresponding to the input data within the lower group that includes multiple subgroups. Temperature and flow rate of the inflowing coolant liquid are balanced so as to optimize heat transfer while efficiently carrying coolant through small lumens without the need for high pressures. The tool is then assigned to one of the one or more objects of the one or more classes by using the identifier of the object.