United Microelectronics Corporation is engaged in the business of manufacturing or fabrication of semiconductors. Using the processes and techniques, the Company manufactures chips to the design specifications of the customers. The Company maintains a customer base across industries, including communication, consumer electronics, computer, memory and others. During the year ended December 31, 2008, the net wafer sales derived from the products used in communication devices, consumer electronics, personal computers (PCs), memory and other applications were 55.86%, 24.66%, 17.27%, 0.72% and 1.49% respectively.