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In recent years, consumer electronic devices have been expanding their application domains from traditional consumer electronic devices such as cellular phones, PDAs(Personal Digital Assistants), PMPs(Portable Multimedia Players), Navigation, to Next Generation Personal Computers(NGPCs) such as eating consumer electronic devices, implanted consumer electronic devices, wearable consumer electronic devices. A wearable consumer electronic device is a computer that is subsumed into the personal space of the user, controlled by the user, and is always on and always accessible. Therefore, among the most salient aspect of wearable consumer electronic devices should be small form factor and long battery lifetime. In this paper, we propose a novel low-power real-time operating system (RTOS) specialized for the ARC(Actual Remote Control). An ARC is a wearable wristwatch-type remote controller; it also can serve as a universal remote control for various consumer electronic devices. The proposed RTOS has about 9KB footprints and is equipped with low-power techniques composed of the dynamic power management and the device power management. Experimental results with wearable application show that we can save energy up to 47 % using the proposed low-power techniques.