Abstract: Disclosed is a tablet PC. The tablet PC includes a pad main body which includes an input portion for inputting predetermined data, and an output portion for outputting results corresponding to input data; a detachable auxiliary device which is detachably coupled to one side of the pad main body to assist functions of the pad main body; and a fastening unit which is provided in the pad main body and fastens the detachable auxiliary device to the pad main body. With this, it is possible to use various auxiliary functions such as convenience in mobility, physical distribution management, inventory control, payment, personal authentication, etc.

Abstract: A portable computer having a heat dissipation structure includes a main body in which a heat generation device generating heat is arranged, wherein a sealed space that is sealed to prevent intrusion of external water and an exposed space into which external air is taken, a heat transfer unit connected to the heat generation device and extended to the exposed space in the sealing space of the main body and transferring the heat of the heat generation device to the exposed space, and a heat dissipation unit arranged in the exposed space of the main body and dissipating the heat transferred by the heat transfer unit. The intrusion of water into the main body may be prevented and simultaneously the heat generated by the heat generation devices may be efficiently dissipated. Thus, the portable computer may be used even in an inferior outdoor environment during rain.