IEC is the abbreviation for Electrotechnical Commission. This commission is an international standardization organization with its headquarters in Geneva and draws up standards in the fields of electrical engineering and electronics. In 1906 the IEC was founded in London and since 1948 it is located in Geneva. The IEC has mainly unified standards for units of measurement such as Gauss, Hertz or Weber. In the meantime, the IEC’s area of responsibility covers all electrical engineering, i.e. it is responsible for all international norms and standards in the field of electronics and electrical engineering. The IEC standards can also be found in the field of German standards as DIN standards. They are marked as DIN IEC. The IEC standards are the basis of many certifications and tests for the issue of test marks. They mainly contain guidelines and standards for quality and safety in the field of electrical engineering and electronics.