Global Testing Corporation Limited, an investment holding company, provides testing services in Singapore, the United States, Taiwan, China, Japan, and internationally. It offers various testing services, such as wafer sorting and final testing to the semiconductor industry, focusing on logic and mixed signal semiconductors used in consumer electronics and communication devices. The company also provides test program development, conversion, and optimization services; and load board and probe card design, as well as leases its testers for trial and pilot testing purposes on an ad hoc basis. In addition, it offers marketing services. The company was founded in 1998 and is headquartered in Hsinchu, Taiwan.