TSMC operates four 12-inch wafer GIGAFAB^® fabs, four 8-inch wafer fabs, and one 6-inch wafer fab – all in Taiwan – as well as one 12-inch wafer fab at a wholly owned subsidiary, TSMC Nanjing Company Limited, and two 8-inch wafer fabs at wholly owned subsidiaries, TSMC Washington in the United States, and TSMC China Company Limited. TSMC provides customer service through account management and engineering services offices in North America, Europe, Japan, China, and South Korea