Headquartered in Northbrook, Illinois, United States, Underwriters Laboratories Inc. (hereinafter UL) is the first institute for safety standard development and certification in USA. As a global comprehensive testing and certification institute, UL provides various services, such as product safety tests, environment tests, product performance tests, and issuance of certificates regarding health care and medical devices etc. UL is the major cooperating partner with KATRI in the area of testing and certification.