There's only one norm : Click on a logo or title to link to the corresponding website Global Standards One (GS1) Electronic Product Code (EPC) Global International Standardisation Organisation (ISO) International Electrotechnical Commission (IEC) International Telecommunication Union (ITU) European Union (EU) / harmonised standards Comité Européen de Normalisation (CEN) Comité Européen de Normalisation Electrotechnique (CENELEC) European Telecommunications Standards Institute (ETSI) Deutsche Kommission Elektrotechnik Elektronik Informationstechnik im DIN und VDE (DKE) American National Standards Institute (ANSI) Electronic Industries Alliance (EIA) Underwriters Laboratories (UL) Federal Communications Commission (FCC) Institute of Electrical & Electronics Engineers (IEEE) / Standards Association Organisation Internationale de Métrologie Légale (OIML) Bureau International des Poids et Mesures (BIPM) Compliance Engineering magazine World Standards Services Network European Patent Office (EPO) / Espacenet United States Patents & Trademark Office (USPTO) / patent register