EN 55022:2006/A1:2007 is now the oldest version of the standard which can be used to provide a presumption of conformity with the EMC Directive. Manufacturers and importers should therefore apply either EN 55022:2006/A1:2007 or EN 55022:2010 before placing product on the European market.
EN 55022 is the Harmonised electromagnetic compatibility standard for Information technology equipment (conducted and radiated emissions).