"The present document gives guidance to Information and Communication Technology (ICT) product and service designers on Human Factors issues@ good Human Factors design practice@ and relevant international and national standards. In particular@ it aims to help designers to maximize the level of usability of products and services by providing a comprehensive set of Human Factors design guidelines. The guidelines are intended to encourage a ""Design for All"" approach so as to make products and services accessible to as many people as possible@ including elderly people and persons with disabilities@ without the need for adaptation or specialized design. The present document is applicable to ICT products with a user interface that are connectable to all kinds of fixed and mobile telecommunications networks. This includes products such as telephones@ Multimedia terminals@ Personal digital Assistants (PDAs) and services such as e-mail@ Short Message Services (SMS) and voice messaging. It is applicable to public and private access devices and services."