Global Testing Corporation Limited, an investment holding company, provides semiconductor testing services in Taiwan, the Republic of China, Japan, the United States, Singapore, Thailand, and internationally. The company offers testing services, such as wafer sorting and final testing for logic and mixed signal semiconductors used in consumer electronics and communication devices. It provides test program development, conversion, and optimization services; and load board and probe card design services, as well as leases its testers to its customers for trial and pilot testing purposes on an ad hoc basis. The company was founded in 1997 and is headquartered in Hsinchu City, Taiwan.