translate English to French: CEN, CENELEC and ETSI. Harmonisation Directives referred at the beginning to the industrial standards which are not mandatory as they are not laid down by the national authorities.
Il existe aujourd'hui trois organisations: le CEN, le Cenelec et l'ETSI. Au départ, les directives d'harmonisation avaient trait aux normes industrielles non obligatoires car non établies par les autorités nationales.