Formerly known as Underwriters Laboratories (UL), this was a non-profit organization but now it has transformed into UL LLC, a for-profit internationally accepted safety organization located in the United States and is one of the biggest & oldest testing laboratories.
Established by William Henry Merrill in 1894, UL has been in practice for about 125 years. It tests products, design safety standards and certifies manufacturers. The products are then known as UL products and are sold around the world. UL products include electronic products, security equipment, lasers, alarms, robotics, medical devices, etc.