Via Executive Order in 2007, the US government required all federal agencies to satisfy 95% of their purchase requirements with EPEAT-registered products.  The registry lists thousands of products, with 40 countries participating.  This year the EPEAT registry expects to add printers, copiers and fax mashines to the registry.  Check this link for a list of current products on the EPEAT registry.

For more information about the development of the EPEAT system, check this link for the Zero Waste Alliance website.