Silicon Integrated Systems Corporation. The Group's principal activities are the manufacture and sale of integrated circuit. Other activities include the research, manufacture and sale of specialized applications and provision of precision installation and testing services for integrated circuit. Products include SiS R658, SiS648FX,SiS655, SiS648, SiS645DX, SiS651, SiS M650, SiS648 and others. Operations of the Group are carried out in Taiwan, the United States of America and Hong Kong.