Underwriters Laboratories Inc. (UL) is an independent product safety certification organization that has been testing products and writing standards for safety for more than a century. UL evaluates more than 19,000 types of products, components, materials and systems annually with 20 billion UL Marks appearing on 72,000 manufacturers’ products each year. UL has five distinct business units: Product Safety, Environment, Life & Health, University, and Verification Services. UL’s worldwide family of companies and network of service providers includes 64 laboratory, testing and certification facilities serving customers in 96 countries.