It stands for Restriction of Hazardous Substances. RoHS, also known as Directive 2002/95/EC, originated in the European Union and restricts the use of specific hazardous materials found in electrical and electronic products (known as EEE).
RoHS has its roots in the European Union back in 2003. The goal of RoHS (Reduction of Hazardous Substances) is to reduce the environmental effect and health impact of electronics. The legislation's primary purpose is to make electronics manufacturing safer at every stage of an electronic device's life cycle