< All Topics Main Fire Detection Systems What Does UL Listed Mean? Print What Does UL Listed Mean? PostedJune 30, 2022 UpdatedApril 28, 2025 Byhrss Underwriters Laboratories, UL, is a company that is approved by the U.S. Occupational Safety and Health Administration, OSHA, to perform safety testing on various products and new technologies over a wide range of industries. Read More